ROOF PANEL JOINT ASSEMBLY

Abstract

This document describes a method for installing a ceiling system comprising: adhesively joining a ceiling panel and a magnetic joining element together to form a ceiling panel assembly; magnetically attaching the ceiling panel assembly to at least one suspended support element; and wherein the ceiling panel and the magnetic joining element are adhesively joined together at the time of installation.

Description

This application is an International PCT Application claiming the benefit of United States of America Provisional Application No. 63 / 069,372, filed on August 24, 2020. The disclosure of the prior applications is incorporated herein by reference. FIELD OF INVENTION The present invention relates to a roof panel assembly, roof systems comprising the roof panel assembly, methods for installing these roof systems, and methods for forming these roof panel assemblies. Particular embodiments of the invention utilize a magnetic fastening element. BACKGROUND OF THE INVENTION Building panels, specifically roof panels, are required to meet stringent safety standards to ensure appropriate resistance to flames and smoke formation during a fire. Meeting these safety requirements often compromises the desired aesthetic and / or structural properties of the panel. Therefore, there is a need for a building panel that not only exhibits enhanced resistance to flame and smoke formation but also displays the desired aesthetic and structural properties. BRIEF DESCRIPTION OF THE INVENTION In some embodiments, the present invention relates to a roofing system comprising: at least one support member comprising a lower support surface; at least one roof panel assembly comprising: a roof panel comprising a porous body having a first major surface opposite a second major surface and a lateral surface extending between them, the porous body having a body thickness as measured between the first and second major surfaces; a magnetic bonding element; an adhesive; wherein the adhesive couples the magnetic bonding element to the first major surface of the porous body, and the adhesive penetrates the porous body to a first depth as measured from the first major surface, the first depth being approximately 1% to approximately 33% of the body thickness;wherein at least one roof panel is secured in place within the roof system by a magnetic coupling between the magnetic joining element and the at least one support member. Other embodiments of the present invention include a roof panel assembly comprising: a roof panel comprising a porous body having a first major surface opposite a second major surface and a lateral surface extending between them, the porous body having a body thickness as measured between the first and second major surfaces; a magnetic bonding element; an adhesive; wherein the adhesive couples the magnetic bonding element to the first major surface of the porous body, and the adhesive penetrates the porous body to a depth as measured from the first major surface, the depth being approximately 1% to approximately 33% of the body thickness;wherein the porous body comprises a network of open pathways extending between the first major surface, the second major surface, and the lateral surface, and wherein the adhesive occupies at least a first portion of the network of open pathways of the porous body. Other embodiments of the present invention include a method of installing a ceiling system comprising: a) adhesively joining together a ceiling panel and a magnetic joining element to form a ceiling panel assembly; b) magnetically attaching the ceiling panel assembly to at least one suspended support element; wherein the ceiling panel and the magnetic joining element are adhesively joined together at the time of installation. Other embodiments of the present invention include a method for forming a roof panel assembly comprising: a) applying an adhesive in a first state to an external surface of a roof panel in a first region; b) contacting a magnetic bonding element with the external surface of the roof panel and the adhesive within the first region; c) mechanically coupling the roof panel and the magnetic bonding element together with a fastener, the fastener extending at least partially through the first region such that the fastener contacts the adhesive in the first state; and d) curing the adhesive such that the adhesive transitions from the first state to a second state to form the roof panel assembly; wherein the first state of the adhesive is an uncured state and the second state of the adhesive is a cured state. Other areas of applicability of the present invention will become apparent from the detailed description provided later herein. It is understood that the detailed description and specific examples, insofar as they indicate the preferred embodiment of the invention, are provided for illustrative purposes only and are not intended to limit the scope of the invention. BRIEF DESCRIPTION OF THE FIGURES The present invention will be more fully understood from the detailed description and accompanying figures, where: FIGURE 1 is a perspective view of a roof panel assembly according to the present invention; FIGURE 2 is a cross-sectional view of the acoustic building panel of FIGURE 1 along lines ll of FIGURE 1; FIGURE 3 is a close-up view of portion X of FIGURE 2; FIGURE 4 is an elevation view of a construction system comprising the roof panel assembly of this disclosure; FIGURE 5 is a perspective view of a construction system comprising the roof panel assembly of this disclosure; FIGURE 6 is a perspective view of a roof panel assembly according to another embodiment of the present invention; FIGURE 7 is a cross-sectional view of the acoustic building panel of FIGURE 6 along lines ll-ll of FIGURE 6; and FIGURE 8 is a close-up view of portion XX of FIGURE 7. DETAILED DESCRIPTION OF THE INVENTION The following description of preferred embodiments is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Since it is used from beginning to end, the terms "intervals" are used as shorthand to describe each and every value that falls within the interval. Any value within the interval can be selected as the endpoint of the interval. Furthermore, all references cited herein are incorporated herein by reference in their entirety. In the event of a conflict between a definition in this disclosure and that of a cited reference, this disclosure shall prevail. Unless otherwise specified, all percentages and quantities expressed herein and elsewhere in this specification are understood to be percentages by weight. Quantities are determined based on the active weight of the material. It is proposed that the description of illustrative embodiments according to the principles of the present invention be read in relation to the accompanying FIGURES, which are to be considered part of the complete written description. In the description of embodiments of the invention disclosed herein, any reference to direction or orientation is made simply for the convenience of the description and is not intended in any way to limit the scope of the present invention. Relative terms such as “lower,” “upper,” “horizontal,” “vertical,” “above,” “below,” “up,” “down,” “top,” and “bottom,” as well as derivatives thereof (e.g., “horizontally,” “downward,” “upward,” etc.), are to be interpreted as referring to the orientation as described below or as shown in the FIGURE under analysis.These relative terms are for the convenience of description only and do not require the apparatus to be constructed or operated in a particular orientation unless explicitly stated as such. Terms such as joined, fixed, connected, coupled, interconnected, and the like refer to a relationship where structures are secured or joined together either directly or indirectly through intermediate structures, as well as to both movable and rigid joints or relationships, unless expressly described otherwise. Furthermore, the features and benefits of the invention are illustrated by reference to the exemplified embodiments. Accordingly, the invention is not expressly limited to the exemplary embodiments that illustrate any possible non-limiting combination of features that may exist alone or in other combinations of features; the scope of the invention is defined by the appended claims hereto. Unless otherwise specified, all percentages and quantities expressed herein and elsewhere in this specification are understood to be weight percentages. The quantities determined are based on the active weight of the material. For the purposes of this application, the term “approximately” means + / - 5% of the reference value. For the purposes of this application, the term “substantially free” means less than approximately 0.1% by weight based on the total reference value. With reference to FIGURES 1-3, this disclosure relates to a building panel assembly 50 (also known as a roof panel assembly 50), comprising a building panel 10 (also known as a roof panel), a magnetic joining element 20, and an adhesive 40. With reference to FIGURES 4-5, this disclosure relates to a building system 1 comprising at least one of the building panel assemblies 50. In some embodiments of the present invention, the building system 1 may be a roof system 1; therefore, the term roof system may be used from beginning to end, but the present invention is not limited to roof applications. Instead, the following analysis may also be applied to other building systems, such as wall systems, interior decorative systems, and the like.The term "roof panel 10" can be used interchangeably with the term "building panel," however, the present invention is not limited to roof panels. The term "roof panel assembly 50" can be used interchangeably with the term "building panel assembly," however, the present invention is not limited to roof panel assemblies. Instead, the following analysis, for example, can also be applied to wall panels. As discussed in more detail herein, the ceiling panel 10 of the present invention can be an acoustic ceiling panel 10. As discussed in more detail herein, the ceiling panel 10 of the present invention can be a flame-resistant ceiling panel 10. The ceiling panel 10 of the present invention can be a flame-resistant acoustic ceiling panel 10. With reference now to FIGURES 1-3, the roof panel 10 may comprise a first major exposed surface 11 that is opposite a second major exposed surface 12. The roof panel 10 may comprise an exposed side surface 13 that extends between the first and second major exposed surfaces 11,12. The roof panel 10 may have a panel thickness as measured by the distance between the first major exposed surface 11 and the second major exposed surface 12. The roof panel 10 may comprise a body 100. The body 100 may comprise a first major surface 111 that is opposite a second major surface 112. The body 100 may comprise a lateral surface 113 that extends between the first and second major surfaces 111,112 of the body 100. The lateral surface 113 may form a perimeter of the body 100. Body 100 can have a body length (LB) that varies from approximately 60 cm to approximately 310 cm, including all lengths and sub-intervals in between. In some modalities, the body length (LB) can vary from approximately 75 cm to approximately 250 cm, including all lengths and sub-intervals in between. In some modalities, the body length (LB) can vary from approximately 104 cm to approximately 230 cm, including all lengths and sub-intervals in between. In some modalities, the body length (LB) can vary from approximately 104 cm to approximately 110 cm, including all lengths and sub-intervals in between. In some modalities, the body length (LB) can vary from approximately 210 cm to approximately 230 cm, including all lengths and sub-intervals in between. Body 100 can have a body width (WB) that varies from approximately 60 cm to approximately 130 cm, including all widths and sub-intervals in between. In some modalities, the body width (WB) can vary from approximately 75 cm to approximately 130 cm, including all widths and sub-intervals in between. In some modalities, the body width (WB) can vary from approximately 100 cm to approximately 120 cm, including all lengths and sub-intervals in between. Body 100 may have a body thickness tB as measured by the distance between the first major surface 111 and the second major surface 112. The body thickness tB may vary from approximately 18 mm to approximately 27 mm, including all thicknesses and sub-intervals in between. In some embodiments, the body thickness tB may vary from approximately 19 mm to approximately 26 mm, including all lengths and sub-intervals in between. In some embodiments, the body thickness tB may vary from approximately 22 mm to approximately 25 mm, including all lengths and sub-intervals in between. In some embodiments, the body thickness tB may be approximately 25.4 mm. According to the present invention, the ratio of body length LB to body thickness te can be at least 24:1. According to the present invention, the ratio of body length Lb to body thickness te can be at least 35:1. In some embodiments, the ratio of body length l_B to body thickness tB can be at least 40:1. In some embodiments, the ratio of body length l_B to body thickness tB can be at least 80:1. In some embodiments of the present invention, the ratio of body length LB to body thickness tB may vary from approximately 35:1 to approximately 172:1, including all ratios and sub-ranges between these. In some embodiments of the present invention, the ratio of body length LB to body thickness tB may vary from approximately 35:1 to approximately 133:1, including all ratios and sub-ranges between these. In some embodiments of the present invention, the ratio of body length LB to body thickness tB may vary from approximately 40:1 to approximately 120:1, including all ratios and sub-ranges between these. In some embodiments of the present invention, the ratio of body length LB to body thickness tB may vary from approximately 40:1 to approximately 50:1, including all ratios and sub-ranges between these.In some embodiments of the present invention, the ratio of body length LB to body thickness tB can vary from approximately 85:1 to approximately 95:1, including all ratios and sub-intervals between these. According to the present invention, the ratio of body width WB to body thickness tB can be at least 24:1. In some embodiments, the ratio of body width WB to body thickness tB can be at least 30:1. In some embodiments, the ratio of body width WB to body thickness tB can be at least 35:1. In some embodiments, the ratio of body width WB to body thickness tB can be at least 40:1. In some embodiments of the present invention, the ratio of body width WB to body thickness tB can vary from approximately 35:1 to approximately 50:1, including all ratios and sub-ranges between these. In some embodiments of the present invention, the ratio of body width LB to body thickness tB can vary from approximately 40:1 to approximately 45:1, including all ratios and sub-ranges between these. The first larger exposed surface 11 of the roof panel 100 may comprise the first larger surface 111 of the body 100. The second larger exposed surface 12 of the roof panel 10 may comprise the second larger surface 112 of the body 100. According to the embodiments where the first larger exposed surface 11 of the roof panel 10 comprises the first larger surface 111 of the body 100 and the second larger exposed surface 12 of the roof panel 10 comprises the second larger surface 112 of the body 100, the panel thickness may be substantially equal to the body thickness tB. In some embodiments, the roof panel 10 may further comprise a fabric covering. The fabric covering or lining sheet may be formed from a non-woven material. By way of example, the non-woven material may be fiberglass. The fabric covering may have a thickness ranging from approximately 0.2 mm to approximately 0.4 mm, including all thicknesses and sub-intervals in between. The fabric covering may be attached to the second larger surface 112 of the body 100. The fabric covering may be attached by adhesive, fasteners, and the like. According to the embodiments where the roof panel 10 comprises a fabric covering attached to the second larger surface 112 of the body 100 and the first larger exposed surface 11 of the roof panel 10 comprises the first larger surface 111 of the body 100, the panel thickness can be substantially equal to the sum of the body thickness and the fabric thickness. In these embodiments, the first larger exposed surface 11 of the roof panel 10 can be formed by the fabric covering. In other words, the first larger exposed surface 11 of the roof panel 10 can comprise the fabric covering. Body 100 can be formed from fibrous material 140. The fibrous material 140 can be present in body 100 in an amount ranging from approximately 90.0% by weight to approximately 99.9% by weight based on the total weight of body 100, including all weight percentages and sub-intervals between. In a preferred embodiment, the fibrous material 140 can be present in body 100 in an amount ranging from approximately 95.0% by weight to approximately 99.9% by weight based on the total weight of body 100, including all weight percentages and sub-intervals between. Fibrous material 140 may comprise a plurality of fibers having an average fiber length ranging from approximately 25 mm to approximately 100 mm, including all fiber lengths and sub-intervals therein. Fibrous material 140 may also comprise a plurality of fibers having an average fiber diameter ranging from approximately 4 denier to approximately 15 denier, including all fiber diameters and sub-intervals therein. A denier is a unit of measurement in fiber techniques equivalent to one gram of mass per 9,000 meters of length. The fibrous material 140 may comprise a plurality of fibers having a substantially straight geometry, whereby the fibers extend substantially straight. In some embodiments, the fibrous material 140 may comprise a plurality of fibers having a crimp geometry, whereby the fibers have a flat, zigzag, and / or spiral shape. In some embodiments, the fibers may have a zigzag shape. In some embodiments, the fibers may have a spiral shape. Fibrous material 140 may comprise organic fiber. The organic fiber may be a synthetic organic fiber. The organic fiber may be present in an amount ranging from approximately 95% to approximately 100% by weight based on the total weight of fibrous material 140, including all weight percentages and sub-ranges in between. In some embodiments, the organic fiber may be present in an amount of at least 99% by weight based on the total weight of fibrous material 140, including all weight percentages and sub-ranges in between. In some embodiments, the organic fiber may be approximately 100% by weight of fibrous material 140. In some forms, the fibrous material 140 consists essentially of organic fiber. In some forms, the fibrous material 140 consists of organic fiber. In some forms, the fibrous material 140 is substantially free of inorganic fiber. In some forms, the body 100 is substantially free of inorganic fiber. In some embodiments, the fibrous material 140 consists essentially of synthetic organic fiber. In some embodiments, the fibrous material 140 consists of synthetic organic fiber. In some embodiments, the fibrous material 140 is substantially free of inorganic fiber. In some embodiments, the body 100 is substantially free of inorganic fiber. In some embodiments, the fibrous material 140 is substantially free of natural organic fiber. In some embodiments, the body 100 is substantially free of natural organic fiber. The term natural organic fiber can refer to fiber that occurs naturally, such as, but not limited to, cellulosic fiber (also known as cellulose fiber). The synthetic organic fiber may be a polymeric fiber. The polymeric fiber may be formed from a thermoplastic polymer. The polymeric fiber may be a polyester fiber. The polyester fiber may be formed from thermoplastic polyester. In other embodiments, the polymeric fiber may be formed from one or more thermoplastic polymers such as, but not limited to, olefinic polymers, for example, polyethylene and polypropylene; polyamide, for example, nylon 6 and nylon 6,6; thermoplastic elastomers, for example, SBS and ABS, and the like. In some embodiments, a portion of the polymeric fiber may be formed from a thermoset polymer. In some forms, the polyolefin can be made from ethylene polymers, such as high-density polyethylene (“HDPE”); medium-density polyethylene (“MDPE”); low-density polyethylene (“LDPE”); and linear low-density polyethylene (“LLDPE”). Polyester fiber may be present in an amount ranging from approximately 95.0% by weight to approximately 100% by weight based on the total weight of fibrous material 140, including all weight percentages and sub-intervals therein. Polyester fiber may be present in an amount of at least approximately 70% by weight based on the total weight of fibrous material 140. In some embodiments, polyester fiber may be present in an amount of at least approximately 99% by weight based on the total weight of fibrous material 140. In some embodiments, polyester fiber may be approximately 100% by weight of fibrous material 140. Non-limiting examples of polyester fiber include fibers formed from polymeric material selected from one or more of the terephthalate polymers, such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyethylene glycol terephthalate (PETG'j, glycol modified PBT, and the like. The polyester polymer that forms polyester fiber can have a glass transition temperature ranging from approximately 70 °C to approximately 85 °C, inclusive of all temperatures and sub-intervals in between. The polyester polymer that forms polyester fiber can have a melting temperature ranging from approximately 110 °C to approximately 295 °C, inclusive of all temperatures and sub-intervals in between. In some embodiments, the polyester fiber may be a single-component fiber formed entirely from a single polyester polymer. In other embodiments, the polyester fiber may be a two-component fiber formed from two different polyester polymers (i.e., a first polyester polymer and a second polyester polymer). The first polyester may have a first melting temperature ranging from approximately 245 °C to approximately 255 °C, inclusive of all temperatures and sub-intervals between these. The second polyester may have a second melting temperature ranging from approximately 255 °C to approximately 265 °C, inclusive of all temperatures and sub-intervals between these.Regardless of the melting temperature intervals cited above, the first melting temperature may be equal to approximately 90% to approximately 97% of the second melting temperature, including all percentages and sub-intervals in between. Bicomponent fiber can have a side-by-side or core-liner configuration. In the core-liner configuration, the first polyester polymer forms the core, and the second polyester forms the liner, which at least partially surrounds the core. In the core-liner configuration, the bicomponent fiber can comprise one or more fibers that are either a concentric core-liner (symmetric core-liner) or an eccentric core-liner (asymmetric core-liner). In bicomponent fibers, the first polyester may be present in an amount ranging from approximately 25% by weight to approximately 75% by weight of the bicomponent fiber and the second polyester is present in an amount ranging from approximately 75% by weight to approximately 25% by weight, where both amounts are based on the total weight of the bicomponent fiber and include all amounts and sub-intervals between these. ΡΟΟ7ηη / Ω7η7 / Β / ΥΙΛΙ Body 100 may further comprise at least one additional component selected from flame retardants, finishing oils, and / or colorants. The additional component may be present in an amount ranging from approximately 0.1% by weight to approximately 10.0% by weight based on the total weight of the body, including all amounts and sub-ranges in between. In some embodiments, the additional component may be present in an amount ranging from approximately 0.1% by weight to approximately 5.0% by weight based on the total weight of the body, including all amounts and sub-ranges in between. The sum of the weight of the fibrous material and the additional component may be equal to 100% of the weight of body 100. Body 100 may consist essentially of the fibrous material and the additional component. Body 100 may consist of the fibrous material and the additional component. The fire retardant may be present in an amount ranging from approximately 0.1% by weight to approximately 5.0% by weight based on the total weight of the body 100, including all amounts and sub-ranges in between. In some embodiments, the fire retardant may be present in an amount ranging from approximately 0.5% by weight to approximately 4.0% by weight based on the total weight of the body 100, including all amounts and sub-ranges in between. Non-limiting examples of fire retardant may include compounds containing non-halogenated phosphorus, phosphine oxides, phosphinates, phosphonates, phosphates, and mixtures thereof. The finishing oil may be present in an amount ranging from approximately 0.1% by weight to approximately 5.0% by weight based on the total body weight, including all amounts and sub-ranges in between. Non-limiting examples of finishing oil may include one or more fiber lubricant compounds. The colorant is present in an amount that varies from approximately 0.1% to approximately 2.0% by weight based on the total body weight, including all amounts and sub-intervals in between. Non-limiting examples of colorant may include dyes, pigments, and combinations thereof. Non-limiting examples of pigments may include titanium dioxide, carbon black, and mixtures thereof. Other non-limiting examples of colorants include 2,2-(vinylenedi-p-phenylene)bisbenzoxazole; copper phthalocyanine; diiron trioxide; 1,1'-((6-phenyl-1,3,5-triazine-2,4-diyl)diimino)bis-9,10antharcenedione; and combinations thereof. The colorant can be white, black, gray, or any color within the color spectrum. According to the present invention, the term "color" can include colors of the visible light spectrum (e.g., red, orange, yellow, green, cyan, blue, violet, brown, etc.) as well as white, black, and gray. In a non-limiting example, the body can be white and the colorant can be titanium dioxide. In a non-limiting example, the body can be black and the colorant can be carbon black. In a non-limiting example, the body can be white and the colorant can be gray and a mixture of titanium dioxide and carbon black. Body 100 may be porous, also known as a porous body 100. Porous body 100 may allow air and water vapor to flow between the first major surface 111, the second major surface 112, and / or the side surface 113. Body 100 may be sufficiently porous to allow sufficient airflow through body 100 under atmospheric conditions for the roof panel 100 to function as an acoustic roof panel, requiring properties related to noise reduction and sound attenuation, as further discussed herein. Specifically, the body 100 of the present invention may have a porosity ranging from approximately 90.0% to approximately 97.0%, including all values ​​and sub-ranges between these. In a preferred embodiment, the body 100 has a porosity ranging from approximately 91% to 94%, including all values ​​and sub-ranges between these. According to the present invention, porosity refers to the following: % Porosity = [VTotai - (VF+ Vac)] / VTotai Where V-rotai refers to the total volume of body 100 defined by the first major surface 111, the second major surface 112, and the lateral surfaces 113. VF refers to the total volume occupied by the fibrous material in body 100. Vac refers to the total volume occupied by the additional components in body 100. Therefore, the % porosity represents the amount of free volume within body 100. The porous nature of body 100 can result in a network of open pathways 150 that exist as gaps between the VF and Vac. The network of open pathways 150 can be fluidly coupled and allow airflow through body 100 between at least the first major surface 111 and the second major surface 112 and / or the lateral surface 113. As discussed in further detail herein, body 100 can comprise a first portion 151 of the network of open pathways 150 that is empty, the term "empty" referring to the fact that the first portion 151 of the network of open pathways 150 is substantially free of any substance other than the fibrous material 140 or additional components comprising body 100. The building panel 10 of the present invention, comprising the porous body 100, can exhibit sufficient airflow to enable the building panel 10 to reduce the amount of sound reflected in a room. The reduction in the amount of sound reflected in a room is expressed by a Noise Reduction Coefficient (NRC) rating as described in American Society for Testing and Materials (ASTM) test method C423. This rating is the average of the sound absorption coefficients in 1 / 3-octave bands (250, 500, 1000, and 2000 Hz), where, for example, a system with an NRC of 0.90 has approximately 90% of the absorption capacity of an ideal absorber. A higher NRC value indicates that the material provides better sound absorption and reduced sound reflection. The building panel 10 of the present invention has an NRC of at least approximately 0.5. In some embodiments, the building panel 10 of the present invention may have an NRC ranging from approximately 0.60 to approximately 1.0, inclusive of all values ​​and sub-intervals between these. In a preferred embodiment, the building panel 10 of the present invention may have an NRC ranging from approximately 0.70 to approximately 1.0, inclusive of all values ​​and sub-intervals between these. Body 100 can also exhibit an apparent density as measured by the total weight of Body 100 divided by Vtotai. The apparent density of Body 100 can range from approximately 72 kg / m³ to approximately 101 kg / m³, including all densities and sub-intervals in between. In a preferred embodiment, the apparent density of Body 100 can range from approximately 77 kg / m³ to approximately 96 kg / m³, including all densities and sub-intervals in between. In some embodiments, the apparent density of Body 100 can range from approximately 86 kg / m³ to approximately 96 kg / m³, including all densities and sub-intervals in between. It has been discovered that the body 100 of the present invention, formulated from the fibrous material and additional components analyzed above, results in a roof panel 10 that exhibits improved resistance to fire and smoke spread. Specifically, this improvement in fire and smoke spread values ​​is observed when the body 100 and the resulting building panel 10 exhibit one or more of the colors analyzed above. The ceiling panel 10 of the present invention can exhibit a Class A fire rating based on a flame spread value of <25, as well as a Class A rating based on a smoke developed value of <450. The ceiling panel 10 of the present invention can also exhibit a smoke developed value of less than 400. The roof panel 10 of the present invention can be manufactured by forming the body 100 according to an air-depositing process or a carding process. A fabric or other coating layer can then be attached to the second major surface 112 of the body 100 by an adhesive or fastener. The fabric or other coating layer can then form the second major exposed surface 12 of the roof panel 10. According to these embodiments, the first major surface 111 of the body 100 can form the second major exposed surface 12 of the roof panel 10. According to these embodiments, the side surface 113 of the body 100 can form the side exposed surface 13 of the roof panel 10. In other embodiments, a coating, such as paint, can be applied to the second major surface 112 of the body, whereby the coating forms the second major exposed surface 12 of the roof panel 10. According to these embodiments, the first major surface 111 of the body 100 can form the second major exposed surface 12 of the roof panel 10. According to these embodiments, the side surface 113 of the body 100 can form the side exposed surface 13 of the roof panel 10. In other embodiments, the body 100 can form the entire roof panel 10, such that no additional covering, coating, or lining is required on the second major surface 112 of the body 100, resulting in the second major surface 112 of the body 100 forming the second major exposed surface 12 of the roof panel. According to these embodiments, the first major surface 111 of the body 100 can form the second major exposed surface 12 of the roof panel 10. According to these embodiments, the side surface 113 of the body 100 can form the side exposed surface 13 of the roof panel 10. The air-depositing process or a carding process forming the body 100 of the present invention may comprise a first step of depositing fibrous material and any additional component onto a first conveyor surface moving along a machine direction. The fibrous material and the additional component may be moved along the machine direction to a mixing apparatus, such as an air-depositing apparatus or a carding apparatus. In the air-depositing process, the fibrous material and any additional component are mixed together in the presence of pressurized air to form a blend. In the carding process, the mixing process may be facilitated by two or more textured rollers that beat the blend of fibrous material, optionally with the additional component. The resulting mixture can be deposited onto a second conveyor surface in the form of a continuous strip having a first thickness. The continuous strip can then be passed along the machine direction between two or more compression rollers, whereby the continuous strip is compressed to a second thickness. The second thickness can be substantially equal to the body thickness tB. The resulting compressed strip can then be cut to the body size 100 for both body length Lb and body width Wb. The ratio of the second thickness to the first thickness can vary from approximately 1:2 to approximately 1:20, including all ratios and sub-ranges in between. During manufacturing, the thermoplastic nature of the polymer fiber can bond the fibrous material and additional components together. Specifically, the mixture can be heated to a temperature above the melting point of at least one thermoplastic polymer within the fibrous material. The mixture can be heated to a temperature ranging from approximately 110 °C to approximately 200 °C, including all temperatures and sub-ranges in between. Above the melting temperature, the thermoplastic polymer can at least partially melt and come into contact with adjacent fibrous material and additional components. When the mixture cools below the melting temperature, the resulting fibrous material and additional components are retained together. The fibrous material can be retained above its melting temperature as the continuous web passes through the compression rollers, thus compressing the web while at least some of the fibrous material remains molten. Therefore, the continuous web can be compressed from the first thickness to the second thickness while molten and then cooled to a solidified state at the second thickness (i.e., body thickness Ib), thereby retaining the second thickness. Once cooled to a solidified state, the continuous web can be cut to size for body width Wb and body length Lb. The body 100 of the roof panel 10 of the present invention can also be formed from at least two separate layers, each layer being formed from the formulation discussed above, whereby each layer can be coupled together by adhesive or a suitable fastener. According to some embodiments, each of the layers that can compose the multi-layer body 100 has a layer thickness that is equal to approximately 10% to approximately 50% of the body thickness tB of the overall body 100, so that when the separate layers are combined, the multi-layer structure has a thickness equal to the body thickness tB. The panel assembly 50 of the present disclosure can be formed by coupling the magnetic joining element 20 to the building panel 10 using at least one adhesive 40.The magnetic joining element 20 may comprise a larger upper surface 21 opposite a larger lower surface 22 and a lateral surface 23 extending between these. The magnetic joining element 20 may have a larger dimension, such as a length, a smaller dimension, such as a width, and a thickness as measured between the larger upper surface 21 and the larger lower surface 22. The magnetic bonding element 20 can be a magnet selected from one or more of a neodymium-iron-boron magnet, a samarium-cobalt magnet, an alnico magnet, a ceramic magnet, and a ferrite magnet. In forming the panel assembly 50, the adhesive 30 can be applied in a first state to at least one glue region of the first larger exposed surface 11 of the roof panel 10. Subsequently, the magnetic bonding element 20 can be placed within one of the glue regions such that the magnetic bonding element 20 comes into direct contact with the adhesive 30. Once applied and the magnetic bonding element 20 is at least partially placed within the first region, the adhesive 30 can cure and transition from the first state to the second state. The adhesive 30 can be applied at the time of installation of the roof panel assembly 50. In other words, the roof panel assembly 50 can be assembled from separate components of the roof panel 10, the adhesive 30, and the magnetic joining element 20 at the time of installation of the roof system 1, which can also be referred to as field assembly of the roof panel assembly 50. The first state of adhesive 30 may be an uncured reactive composition. Non-limiting examples of uncured reactive compositions include isocyanate-terminated polyurethane prepolymers, unreacted resin-hardener mixtures, and other reactive compositions that may cure upon exposure to moisture under atmospheric conditions. Non-limiting examples of unreacted resin-hardener mixtures include epoxy blends comprising a reactive resin and a crosslinker. In a non-limiting embodiment, the adhesive in its first state may be an isocyanate-terminated polyurethane prepolymer, whereby the isocyanate groups are water-reactive and cure upon exposure to moisture to form urea-linked polyurethane. Specifically, the adhesive 30 in the first state can be applied directly to the first exposed major surface 11 of the building panel 10 in at least one glue region, and subsequently the lower major surface 22 of the magnetic bonding element 20 can be brought into contact with one of the glue regions such that the lower major surface 22 of the magnetic bonding element 20 comes into contact with the adhesive 30 within the glue region. In an alternative embodiment, the adhesive 30 in the first state can be applied directly to the lower larger surface 22 of the magnetic bonding element 20, so that the adhesive-applied lower larger surface 22 of the magnetic bonding element 20 then comes into contact with the first exposed larger surface 11 of the building panel 10 such that the contact between the magnetic bonding element 20, the adhesive 30, and the building panel 10 forms at least one glue region. Once in contact with the first major exposed surface 11 of the building panel 10, the adhesive 20 can flow and penetrate the body 100 of the building panel 10 to form an internal region 31 of the adhesive 30 that occupies at least some of the voids formed by the open path network 150 within the body, so that the voids of the body 100 that are occupied by the internal region 31 of the adhesive are a second portion 152 of the open path network within the body 100. In other words, the panel assembly 50 includes the body 100 that has the first portion 151 of the open path network 150, so that the first portion 151 includes open voids that are empty, as well as the second portion 152 of the open path network 150 that are occupied by the internal region 31 of the adhesive 30. The adhesive 30 present in the internal region 31 can penetrate the body 100 from the first major surface 111 of the body 100 to a first depth Di that varies from approximately 1% to approximately 50% of the panel thickness te, including all percentages and sub-intervals in between. In some embodiments, the first depth Di varies from approximately 10% to approximately 50% of the panel thickness ib, including all percentages and sub-intervals in between. In some embodiments, the first depth Di varies from approximately 15% to approximately 45% of the panel thickness te, including all percentages and sub-intervals in between. After application, as adhesive 30 reacts to the transition from the first state to the second state (i.e., cures), it can undergo both a chemical and a physical transformation. In a non-limiting embodiment, adhesive 30 can be an expanding adhesive that undergoes a volume change during the curing step (i.e., as it transitions from the first state to the second state). In this embodiment, the adhesive 30 in the first state can occupy a first volume, and the adhesive 30 in the second state can occupy a second volume, with the second volume being larger than the first. Alternatively, the adhesive 30 in the first state can exhibit a first density, and the adhesive 30 in the second state can exhibit a second density, with the second density being less than the first. According to some embodiments, when the adhesive 30 is an expanding adhesive, the curing step may increase the volume occupied by the second portion 152 of the open route network 150. According to some embodiments, when the adhesive 30 is an expanding adhesive, the curing step may increase the first depth Di to which the adhesive penetrates the body 100 of the roof panel 10. Once it comes into contact with the first larger exposed surface 11 of the building panel 10, the adhesive 30 can exist above the first larger exposed surface 11 of the building panel 10 to form an external region 32 of the adhesive 30 that does not occupy the internal volume of the body 100. The external region 32 of the adhesive 30 can be at least partially in contact with the side surface 23 of the magnetic bonding element 20. According to the modalities where the adhesive 30 is an expansion adhesive, the curing step can also cause the adhesive to come into contact with a larger portion of the lateral surface 23 of the magnetic bonding element 20. In the second state, the adhesive 30 can cohesively bond at least the lower surface 22 of the magnetic bonding element 20 to the first larger surface 111 of the body 100. In the second state, the adhesive 30 can cohesively bond at least the lower surface 22 of the magnetic bonding element 20 to the first larger exposed surface 11 of the building panel 10. In the second state, the internal region 31 of the adhesive 30 can be cohesively bonded to the fibrous material 140 located within the second portion 152 of the open pathway network 150 of the body 100. In the second state, the internal region 31 of the adhesive 30 can be mechanically interlocked with the fibrous material 140 located within the second portion 152 of the open pathway network 150 of the body 100, such that the magnetic bonding element 20 is cohesively bonded to the adhesive 30 and the adhesive 30 is mechanically interlocked with the fibrous material 140 located within the second portion 152 of the open pathway network 150 of the body 100. In the second state, the outer region 32 of the adhesive 30 can cohesively bond the side surface 23 of the magnetic bonding element 20 to the first larger surface 111 of the body 100. In the second state, the outer region 32 of the adhesive 30 can cohesively bond the side surface 23 of the magnetic bonding element 20 to the first larger exposed surface 11 of the roof panel 10. With reference now to FIGURES 4-6, the present invention further includes a ceiling system 1 comprising at least one of the ceiling panel assemblies 50. In some embodiments, the ceiling system 1 may comprise a plurality of the ceiling panel assemblies 50. The ceiling system 1 may comprise one or more of the ceiling panel assemblies 50 installed in an interior space, whereby the interior space comprises a plenum 3 and an active room environment 2. The plenum 3 is located below the structural ceiling, which is the downward-facing surface of the structural separation between floors or a roof of a building, such as a subfloor of an adjacent upper floor, or the roof structure of a building. Full space 3 provides space for mechanical lines within a building (e.g., HVAC, plumbing, etc.). Active space 2 provides space for building occupants during the building's normal intended use (e.g., in an office building, the active space would be occupied by offices containing computers, lighting, etc.). In the installed state, the ceiling panel assemblies 50 can be magnetically supported in the interior space by one or more support elements 300. The support elements 300 can comprise a lower support surface 310 configured for magnetic attachment to the magnetic attachment element 20 of the ceiling panel assembly 50. In some embodiments, the support elements 300 may comprise an elongated member 301 extending longitudinally along a longitudinal axis AA. The elongated member 301 may comprise the lower bearing surface 310, which also extends along the longitudinal axis AA. The lower bearing surface 310 of the elongated member 301 may have a width Wem as measured in a direction transverse to the longitudinal axis AA. Non-limiting examples of the elongated member 301 include a support strut or an inverted T-bar, whereby the lowest bearing surface 310 is the lower surface of the support strut or the lower face of a lower flange of the inverted T-bar. The support elements 300 comprise elongated members 301; the roof system 1 may comprise a plurality of these elongated members 301 arranged in a parallel arrangement. Each of the roof panel assemblies 50 can be installed by placing the upper surface 21 of each magnetic joining element 20 of each roof panel assembly 50 adjacent to the lowermost supporting surface 310 of an elongated member 301. The elongated member 301 can be formed from a ferrous metal, thereby creating a magnetic connection between the elongated member 301 and the magnetic joining element 20. The resulting interface between the upper surface 21 of the magnetic joining element 20 and the lower support surface 310 of the elongated member 301 can be substantially free of adhesive. According to the present invention, the major dimension of the magnetic fastening element may be equal to or less than the width Wem of the elongated member 301. In some embodiments, the major dimension of the magnetic fastening element may be substantially equal to the width Wem of the elongated member 301. In some embodiments, the major dimension of the magnetic fastening element may be less than the width Wem of the elongated member 301. The ratio of the width Wem of the elongated member 301 to the major dimension of the magnetic fastening element may vary from approximately 1.0:1.0 to approximately 5.0:1.0, including all ratios and sub-ratios therein. The ratio of the width Wem of the elongated member 301 to the major dimension of the magnetic fastening element may vary from approximately 1.1:1.0 to approximately 2.0:1.0, including all ratios and sub-ratios therein. According to the present invention, the smaller dimension of the magnetic connecting element may be equal to or less than the width Wem of the elongated member 301. In some embodiments, the smaller dimension of the magnetic connecting element may be substantially equal to the width Wem of the elongated member 301. In some embodiments, the smaller dimension of the magnetic connecting element may be less than the width Wem of the elongated member 301. The ratio of the width Wem of the elongated member 301 to the larger dimension of the magnetic connecting element may vary from approximately 1.0:1.0 to approximately 5.0:1.0, including all ratios and sub-ranges therein. With reference now to FIGURES 6-8, a roof panel assembly 50a according to another embodiment of the present invention is illustrated. The roof panel assembly 50a is similar to the roof panel assembly 50 except as described below. The description of the roof panel assembly 50 above applies generally to the roof panel assembly 50a described below, except with respect to the differences specifically noted below. A similar numbering scheme will be used for the roof panel assembly 50a as with the roof panel assembly 50, except that numbers with the suffix "a" will be used. The panel assembly 50a of this disclosure can be formed by attaching the magnetic fastening element 20a to the building panel 10a using at least one adhesive 30a and one fastener 40a. The magnetic fastening element 20a may comprise a larger upper surface 21a opposite a larger lower surface 22a, a side surface 23a extending between them, and a through-hole 24a extending continuously between the larger upper surface 21a and the larger lower surface 22a at a location that is at least partially inserted from the side surface 23a. In some embodiments, the magnetic fastening element 20a may further comprise a countersunk portion 25a formed in the through-hole 24a, such that the countersunk portion 25a is located immediately adjacent to the larger upper surface 21a of the magnetic fastening element 20a. In forming the panel assembly 50a, the adhesive 30a in the first state can be applied to at least one glued region of the first larger exposed surface 11a of the roof panel 10a. Subsequently, the magnetic fastener 20a can be positioned within one of the glued regions such that the magnetic fastener 20a comes into direct contact with the adhesive 30a. Subsequently, the fastener 40a can be driven through the through-hole 24a of the magnetic fastener 20a and into the body 100a of the roof panel 10a, so that the through-hole 24a of the magnetic fastener 20a overlaps at least partially with the glued region in the vertical direction, such that the fastener 40a extends at least partially through the adhesive 30a present in the glued region. In some embodiments, fastener 40a is inserted through adhesive 30a into the glue region when adhesive 30a is in the first state or has not yet fully transitioned to the second state. In some embodiments, fastener 40a is inserted through adhesive 30a into the glue region when adhesive 30a is in the second state. The fastener 40a may comprise a head 41a and a locking element 42a extending downward from the head 41a. In a non-limiting example, the fastener 40a may be a screw comprising a head 41a and a locking element 42a that is a threaded body. The locking element 42a of the fastener 40a may extend through the through-hole 24a of the magnetic fastening element 20a and into the body 100a to a second depth D2A as measured from the first major surface 111a of the body 100a to the most distal point of the locking element 42a. The second depth Día can vary from approximately 20% to approximately 80% of panel thickness ib, including all percentages and sub-intervals in between. In some configurations, the second depth D2a can vary from approximately 30% to approximately 80% of panel thickness te, including all percentages and sub-intervals in between. In some configurations, the second depth Ü2A can vary from approximately 30% to approximately 75% of panel thickness ib, including all percentages and sub-intervals in between. The head 41a of the fastener 40a can be located completely within the countersunk portion 25a of the magnetic fastening element 20a, thereby resulting in no horizontal overlap between the top surface 21a of the magnetic fastening element and the fastener 40a. The adhesive 30a can be applied and the fastener 40a can be secured to the roof panel 10a at the time of installation of the roof panel assembly 50a. In other words, the roof panel assembly 50a can be assembled from separate components of the roof panel 10a, the adhesive 30a, the fastener 40a, and the magnetic joining element 20a at the time of installation of the roof system 1a, which can also be referred to as field assembly of the roof panel assembly 50a. In some embodiments, the adhesive 30a in the first state can be applied directly to the first exposed major surface 11a of the building panel 10a in at least one adhesive region, and subsequently the lower major surface 22a of the magnetic fastening element 20a can be brought into contact with one of the adhesive regions such that the lower major surface 22a of the magnetic fastening element 20a makes contact with the adhesive 30a within the adhesive region. Subsequently, the fastener 40a can be driven into the roof panel 10a through the adhesive region, so that the fastener 40a extends through the through-hole 24a present in the magnetic fastening element 20a. Adhesive 30a can be an expanding adhesive that reacts to transition from the first state to the second state (i.e., cures), thus undergoing both a chemical and a physical transformation. In a non-limiting embodiment, expanding adhesive 30a can undergo a change in volume during the curing step (i.e., as adhesive 30a transitions from the first state to the second state). In this embodiment, adhesive 30a in the first state can occupy a first volume, and adhesive 30a in the second state can occupy a second volume, with the second volume being greater than the first volume. In this embodiment, adhesive 30a in the first state can exhibit a first density, and adhesive 30a in the second state can exhibit a second density, with the second density being less than the first density. According to some embodiments, when the adhesive 30a is an expanding adhesive, the curing step may increase the volume occupied by the second portion 152a of the open path network 150a. According to some embodiments, when the adhesive 30a is an expanding adhesive, the curing step may increase the first depth Día to which the adhesive penetrates the body 100A of the roof panel 10A. Additionally, the adhesive 30a may expand in the through-hole 24a of the magnetic fastener 20a before fully transitioning to the second state, such that the adhesive 30a is present within the through-hole 24a of the magnetic fastener 20a in at least a partially uncured state before the fastener 40a is driven through the through-hole 24a.In this mode, the adhesive 30a expands both in the through hole 24a of the magnetic bonding element 20a and in the second portion 152a of the open path network 150a before fully curing (i.e., before making a complete transition from the first state to the second state). Once in contact with the first major exposed surface 11a of the building panel 10a, the adhesive 30a can flow and penetrate the body 100a of the building panel 10a to form an internal region 31a of the adhesive 30a that occupies at least some of the voids formed by the network of open pathways 150a within the body. Driving the fastener 40a into the body 100a and through the adhesive region can result in the internal region 31a of the adhesive 30a extending to a first depth Día that varies from approximately 1% to approximately 50% of the panel thickness tB, including all percentages and sub-intervals in between. In some embodiments, the first depth Día varies from approximately 10% to approximately 50% of the panel thickness tB, including all percentages and sub-intervals in between.In some modalities, the first Day depth varies from approximately 15% to approximately 45% of the panel thickness tB, including all percentages and sub-intervals between these. The ratio of the second depth (D2a) to the first depth (Día) can vary from approximately 1:1 to approximately 5:1, including all ratios and subintervals in between. The ratio of the second depth (D2A) to the first depth (Día) can vary from approximately 1:1 to approximately 3:1, including all ratios and subintervals in between. The ratio of the second depth (Dsa) to the first depth (Día) can vary from approximately 1:1 to approximately 2:1, including all ratios and subintervals in between. The ratio of the second depth (D2a) to the first depth (Día) can vary from approximately 1:1 to approximately 1.5:1, including all ratios and subintervals in between. In the second state, the adhesive 30a can cohesively bond at least the lower surface 22a of the magnetic bonding element 20a to the first larger surface 111a of the body 100a. In the second state, the adhesive 30a can cohesively bond at least the lower surface 22a of the magnetic bonding element 20a to the first larger exposed surface 11a of the building panel 10a. In the second state, the internal region 31a of the adhesive 30a can be cohesively bonded to the fibrous material 140a located within the second portion 152a of the open pathway network 150a of the body 100a. In the second state, the internal region 31a of the adhesive 30a can be mechanically interlocked with the fibrous material 140a located within the second portion 152a of the open pathway network 150a of the body 100a such that the magnetic bonding element 20a is cohesively bonded to the adhesive 30a and the adhesive 30a is mechanically interlocked with the fibrous material 140a located within the second portion 152a of the open pathway network 150a of the body 100a. In the second state, the internal region 31a of the adhesive 30a can cohesively bond the securing element 42a of the fastener 40a to the fibrous material 140a located within the second portion 152a of the open pathway network 150a of the body 100a. In the second state, the internal region 31a of the adhesive 30a can be mechanically interlocked with both threads present in the securing element 42a of the fastener 40a and the fibrous material 140a located within the second portion 152a of the open pathway network 150a of the body 100a. In the second state, the outer region 32a of the adhesive 30a can cohesively bond the side surface 23a of the magnetic bonding element 20a to the first larger surface 111a of the body 100a. In the second state, the outer region 32a of the adhesive 30a can cohesively bond the side surface 23a of the magnetic bonding element 20a to the first larger exposed surface 11a of the roof panel 10a. Although not depicted, according to the modalities, the building systems form wall surfaces. In the installed state, the first major exposed surface 11 of the building panel 10 may face a wall support surface (such as a strut or a pre-existing drywall wall surface) and the second major exposed surface 12 of the building panel 10 may face the active room environment 2, so that the first and second major exposed surfaces are in a vertical or semi-vertical orientation relative to the active room environment 2.

Claims

1. A roofing system, characterized in that it comprises: at least one support member comprising a lower support surface; at least one roof panel assembly comprising: a roof panel comprising a porous body having a first larger surface opposite a second larger surface and a lateral surface extending between them, the porous body having a body thickness as measured between the first and second larger surfaces; a magnetic fastening element; an adhesive; wherein the adhesive couples the magnetic fastening element to the first larger surface of the porous body, and the adhesive penetrates the porous body to a first depth as measured from the first larger surface, the first depth being approximately 1% to approximately 50% of the body thickness;and wherein at least one roof panel is secured in place within the roof system by a magnetic coupling between the magnetic joining element and at least one support member.

2. The roofing system according to claim 1, characterized in that the porous body is formed from a fibrous material and comprises a network of open pathways extending between the first major surface, the second major surface and the side surface, and wherein the adhesive occupies at least a first portion of the network of open pathways of the porous body.

3. The roof system according to claim 2, characterized in that the adhesive present in the first portion of the open route network surrounds a first portion of the fibrous material, thereby mechanically interlocking the adhesive and the first portion of the fibrous material.

4. The roof system according to any of claims 1 to 3, characterized in that the adhesive is an expanding material.

5. The roofing system according to any of claims 1 to 4, characterized in that the porous body has an apparent density ranging from approximately 86.5 kg / m3 to approximately 96.1 kg / m3 and a porosity ranging from approximately 90% to approximately 97%.

6. The roof system according to any of claims 1 to 5, characterized in that the roof panel assembly further comprises a fastener extending through the magnetic fastening element and into the roof panel, and wherein the fastener is in contact with the adhesive. cccznn / cznz / B / viAi 7. The roof system according to claim 6, characterized in that the fastener extends into the roof panel a second depth as measured from the first larger surface, the second depth being approximately 20% to approximately 80% of the body thickness.

8. A roof panel assembly, characterized in that it comprises: a roof panel comprising a porous body having a first major surface opposite a second major surface and a lateral surface extending between them, the porous body having a body thickness as measured between the first and second major surfaces; a magnetic bonding element; an adhesive; wherein the adhesive couples the magnetic bonding element to the first major surface of the porous body, and the adhesive penetrates the porous body to a depth as measured from the first major surface, the depth being approximately 1% to approximately 50% of the body thickness; and wherein the porous body comprises a network of open paths extending between the first major surface, the second major surface, and the lateral surface, and wherein the adhesive occupies at least a first portion of the network of open paths of the porous body.

9. The roof panel assembly according to claim 8, characterized in that the porous body is formed from a fibrous material, and wherein the adhesive present in the first portion of the open pathway network surrounds a first portion of the fibrous material, thereby mechanically interlocking the adhesive and the first portion of the fibrous material.

10. The roof panel assembly according to any of claims 8 to 9, characterized in that the porous body has an apparent density ranging from approximately 86.5 kg / m3 to approximately 96.1 kg / m3, and wherein the porous body has a porosity ranging from approximately 90% to approximately 97%.

11. The roof panel assembly according to any of claims 8 to 10, characterized in that it further comprises a fastener extending through the magnetic fastening element and into the roof panel.

12. The roof panel assembly according to claim 11, characterized in that the fastener extends into the roof panel a second depth as measured from the first larger surface, the second depth being approximately 20% to approximately 80% of the body thickness.

13. A method for installing a ceiling system characterized in that it comprises: a) adhesively joining together a ceiling panel and a magnetic joining element to form a ceiling panel assembly; b) magnetically attaching the ceiling panel assembly to at least one suspended support element; and wherein the ceiling panel and the magnetic joining element are adhesively joined together at the time of installation.

14. The method according to claim 13, characterized in that step a) further comprises applying an adhesive to the roof panel and the magnetic joining element, whereby the adhesive is mechanically interlocked and cohesively bonded to the roof panel.

15. The method according to claim 13, characterized in that step a) further comprises securing the roof panel and the magnetic joining element together with a fastener, whereby the fastener comes into contact with the adhesive.

16. The roof panel assembly according to any of claims 13 to 15, characterized in that the roof panel comprises a first major surface opposite a second major surface and a side surface extending between them, the roof panel further comprising a porous body having a network of open paths extending between the first major surface, the second major surface and the side surface, and wherein after step a) the adhesive occupies at least a first portion of the network of open paths of the porous body.

17. The method according to claim 16, characterized in that during step a) the adhesive expands during curing in the first portion of the open path network.

18. A method for forming a roof panel assembly, characterized in that it comprises: a) applying an adhesive in a first state to an external surface of a roof panel in a first region; b) contacting a magnetic bonding element with the external surface of the roof panel and the adhesive within the first region; c) mechanically coupling the roof panel and the magnetic bonding element to each other with a fastener, the fastener extending at least partially through the first region such that the fastener contacts the adhesive in the first state; d) curing the adhesive so that the adhesive transitions from the first state to a second state to form the roof panel assembly; and wherein the first state of the adhesive is an uncured state and the second state of the adhesive is a cured state.

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