Roof construction for a conservatory, winter garden and terrace covering

Abstract

Described and claimed is a roof structure for a conservatory or patio roof with two longitudinal beams that extend parallel to each other in a roof plane. A plurality of rafters extend between the longitudinal beams, parallel to each other and to the roof plane, as well as perpendicular to the longitudinal beams. A support is provided on each of the rafters to support flat roof elements between two adjacent rafters. In a first section, the support forms a gradient towards the first longitudinal beam. In a second section, the support forms a gradient towards the second longitudinal beam. The roof structure is surrounded by a circumferential fascia that extends parallel to the roof plane and has a fascia height perpendicular to the roof plane that is greater than a maximum rafter height perpendicular to the roof plane. Furthermore, a conservatory ora terrace roof with a corresponding roof construction is presented and claimed.

Description

[0001] The present invention relates to a roof construction for a winter garden or a patio roof and to a winter garden or a patio roof with such a roof construction.

[0002] A conservatory is a permanent extension to a permanent building, such as a house, that provides protection from wind and weather. The walls and roof of a conservatory are typically made of large, transparent roof elements that allow sunlight to penetrate the conservatory. The sun warms the air inside, allowing comfortable temperatures to be maintained even at low outside temperatures. Conservatories can be heated or (essentially) unheated. In the latter case, they are referred to as cold conservatories.

[0003] Conservatories typically have a lean-to roof, which is attached to a building's exterior wall on one side and rests on two or more posts opposite. Instead of being attached to the exterior wall, the lean-to roof can also rest on several pillars on the side of the house. The lean-to roof slopes away from the exterior wall so that rain and meltwater can drain away and not collect on the roof. To ensure sufficient drainage, lean-to roofs often have a pitch of 5° or more. This means that conservatories—depending on their size—often have roof heights of 40 cm or more.

[0004] For example, if the conservatory is to be installed on a building with a flat roof, the sloping lean-to roof of the conservatory may be perceived as aesthetically unsuitable. Therefore, it is known from the state of the art to equip lean-to roofs of conservatories with a surrounding fascia with a uniform vertical fascia height, so that the entire roof structure is concealed by the fascia at the sides. The fascia can be formed, for example, from sheet metal or a surrounding purlin crown or purlin ring. Since the fascia must cover and overlap the entire roof height, fascia heights of 45 cm or more are easily achieved, which accordingly leads to a disproportion between the overall height of the conservatory and the fascia height.

[0005] Patio roofs are also usually designed as lean-to roofs. This poses the corresponding problem that the lean-to roof, which slopes away from the building, is perceived as aesthetically unsuitable, and the fascia used to improve the appearance has a fascia height that is disproportionate to the other dimensions of the patio roof.

[0006] Against this background, it is an object of the present invention to provide an improved roof construction for a conservatory as well as a conservatory or a patio roof, by means of which a reduced roof height can be achieved.

[0007] The object is achieved by a roof construction according to claim 1 and a winter garden or a patio roof according to claim 12. Preferred embodiments of the roof construction are the subject of the dependent claims.

[0008] According to a first aspect of the invention, a roof structure for a conservatory or patio roof comprises a first longitudinal beam and a second longitudinal beam. The first longitudinal beam and the second longitudinal beam extend parallel to one another in a roof plane. A plurality of rafters extend between the first longitudinal beam and the second longitudinal beam. The plurality of rafters run parallel to one another, perpendicular to the first longitudinal beam, and parallel to the roof plane. Each of the rafters has a continuous web. The continuous web extends uninterruptedly from the first longitudinal beam to the second longitudinal beam, parallel to a rafter direction. Each of the webs has two outer surfaces that run perpendicular to the roof plane and parallel to the rafter direction. For supporting flat roof elements between each two adjacent rafters, a support is attached to each outer surface of a web facing an adjacent rafter.In a first section, extending away from the first longitudinal beam, the support forms a slope toward the first longitudinal beam. In a second section, extending from the first section to the second longitudinal beam, the support forms a slope toward the second longitudinal beam. The roof structure is surrounded by a continuous fascia that extends parallel to the roof plane and has a fascia height perpendicular to the roof plane that is greater than a maximum rafter height perpendicular to the roof plane.

[0009] In other words, the invention provides a roof structure that, instead of the lean-to roof typically used for a conservatory or patio roof, implements a gable roof that is completely concealed behind a surrounding panel. By using a gable roof, the height of the roof structure can be significantly reduced compared to conventional roof structures for conservatories. Whenever details of the roof structures are described below, this implies that they are always suitable for conservatories and patio roofs, unless it is explicitly stated that the details apply only to conservatories or patio roofs.

[0010] The roof structure initially has two longitudinal beams, one of which borders the roof structure towards a building and the other borders the roof structure at the opposite end. The longitudinal beams can, for example, be connected by cross beams arranged at their outer ends. This can, for example, form a continuous purlin. However, this is not necessary. The first longitudinal beam and the second longitudinal beam can also run perpendicular to an external wall of a building on which the conservatory is located. If the conservatory is located in the corner of a house, the longitudinal beams can also be arranged parallel to a first external wall of the building and perpendicular to a second external wall. In any case, however, they border the roof structure on opposite sides.

[0011] According to the invention, the longitudinal beams run parallel to each other and in a plane, which is hereinafter referred to as the roof plane. If the roof structure is part of a conservatory or is used as a patio roof, the roof plane runs horizontally. Thus, viewed from the side, the arrangement of the longitudinal beams parallel to each other and in a plane creates the impression that the roof structure has no visible slope.

[0012] A number of rafters rest on the longitudinal beams, extending from one longitudinal beam to the other and—as is typical for rafters—run parallel to each other. The number of rafters varies, particularly depending on the dimensions of the roof structure. At least two rafters are provided, with flat roof elements arranged between them. However, significantly more than two rafters are usually used.

[0013] Each rafter has a web that runs between the two longitudinal beams. The web can be, for example, the web of a T-beam or a double I-beam. Furthermore, the web can be made of aluminum, steel, or another metal or metal alloy. In any case, the web has two parallel outer or side surfaces, each of which faces directly adjacent rafters and runs perpendicular to the roof plane.

[0014] To support the flat roof elements, a support for flat roof elements is attached to each outer surface of a rafter that faces another rafter. For example, the supports can be formed by elongated L-profiles or angle profiles attached to the outer surfaces. The profiles are preferably made of the same material as the web, but to simplify production, they are not machined as a single piece with the web. Instead, they are subsequently attached to the outer surfaces of the web during the manufacture of the roof structure and permanently bonded to them.

[0015] The supports represent support surfaces on which the flat and preferably transparent roof elements are arranged. Each rafter has a support so that flat roof elements can be placed between it and each immediately adjacent rafter. A rafter that is located between two other rafters therefore has two supports so that a connection can be made to both adjacent rafters via flat roof elements. A rafter at the edge of the roof structure with only one immediately adjacent rafter therefore only requires one support because flat roof elements are only placed on one side of the rafter. This does not, however, prevent a rafter at the edge of the roof structure from having two supports, of which the support facing the edge remains unused, for example.This has the advantage that fewer different components are required for the roof structure, since the edge rafters and the center rafters are identical. If a rafter has two supports, these can be spatially separated. They can also be designed as a single piece.

[0016] Each support between the longitudinal beams is divided into two sections. A first section extends from the first longitudinal beam to the second section and the second section extends from the first section to the second longitudinal beam. The first section and the second section differ from each other in their gradient. In the area of the first section, the support slopes down towards the first longitudinal beam. If water falls onto flat roof elements that are held by two supports in the first section, the water runs off towards the first longitudinal beam. In the area of the second longitudinal beam, however, the support slopes down towards the second longitudinal beam. Accordingly, water that falls onto roof elements held by the second section runs off towards the second longitudinal beam. Consequently, an apex or the highest point of the rafter support is formed between the first and second sections of the longitudinal beam.It goes without saying that the supports of immediately adjacent rafters, which together are intended to hold the same flat roof element, should ideally run parallel to each other in order to provide stable support for the flat roof elements.

[0017] By using split supports on the rafters, the height of the roof structure can be significantly reduced compared to a lean-to roof, without sacrificing a sufficient slope of the flat roof elements. Rain and meltwater thus drain further, preventing puddles from forming on the roof elements. This allows the height of the surrounding fascia around the roof structure to be reduced compared to a conventional conservatory with a lean-to roof, without the roof structure being visible from the outside. The fascia thus appears less massive than the rest of the conservatory structure, which enhances the overall appearance of the conservatory.

[0018] In this context, a fascia is referred to as circumferential if it surrounds the roof structure at least in those sections that are not adjacent to or attached to an exterior building wall. However, it is preferred if the fascia extends completely around the outside of the roof structure. The height of the fascia, which is constant all the way around the roof structure, is selected so that the roof structure is largely or even completely concealed from the outside. At the very least, the fascia height is selected so that the fascia completely conceals the rafters and the flat roof elements arranged on them when the roof structure is projected onto a vertical plane perpendicular to the roof plane.

[0019] In a preferred embodiment, the supports are formed by support elements. Each support element is at least partially materially bonded to the outer surface of the web of the respective rafter. The support elements are preferably formed by L-profiles or angle profiles. Furthermore, it is preferred if the support elements are materially bonded to the web of the respective rafter. In other words, the preferred embodiment provides for the supports to be formed by support elements, for example in the form of angle profiles or L-shaped profiles. For example, two support elements in the form of L-shaped profiles can be attached to each outer surface, with each support element forming a section of the support. The support elements are preferably made of the same material as the rafters and welded to them.The support elements do not have to be welded to the outer surfaces along their entire length. Rather, it is sufficient if the support elements are welded to the outer surfaces in sections. In any case, however, there is a solid, non-detachable connection between the outer surfaces and the support elements. The support elements are therefore not simply connected to the rafters via plug-in connections, snap-in connections, screw connections, or other reversibly detachable connections.

[0020] Preferably, the rafter height of the web perpendicular to the roof plane between the first longitudinal beam and the second longitudinal beam is constant. A uniform rafter height simplifies the fabrication of the roof structure, as the rafters can be made from uniform beams that do not require chamfering. Since the fascia always suggests a flat roof, the uniformly high rafters are not noticeable from the outside and do not contribute to the external design of the roof.

[0021] The rafters are preferably designed as T-beams with a flange extending vertically from the web on both sides. The flange of the rafters rests on the first longitudinal beam and the second longitudinal beam. In other words, the preferred embodiment provides for the rafters to be formed by simple T-beams. The T-beams are made, for example, of aluminum, which is lightweight and does not rust. T-beams can absorb high loads, and the flanges running parallel to the roof plane can be placed directly on the longitudinal beam. Since T-beams are commercially available in a wide variety of designs, the use of T-beams enables a cost-effective yet robust roof structure.

[0022] In a preferred embodiment, the rafters between the longitudinal beams are prestressed in such a way that the rafters do not bend downwards under the load of the flat roof elements in such a way that a surface of the rafters facing a floor assumes a convex shape.

[0023] In other words, the preferred embodiment provides that the rafters do not merely rest on or be connected to the longitudinal beams, but are pre-tensioned between the longitudinal beams to prevent the rafters from bending or sagging under the weight of the flat roof elements. Specifically, the pre-tensioning prevents the rafters from curving towards the ground in the middle after the flat roof elements have been supported, i.e. colloquially speaking, from sagging. This prevents there from being a lowest point between the two longitudinal beams along the rafters, where condensation collects on the rafters instead of flowing off laterally to the longitudinal beams. If condensation collects on the rafters, this can lead to unwanted droplets forming in the middle under the roof structure if the rafters are sagging. In the present embodiment, the pre-tensioning of the rafters counteracts this.However, the rafters must be made in one piece.

[0024] The first section of each support preferably extends from the first longitudinal beam to the center of the respective rafter. The second section of each support preferably extends from the center of the respective rafter to the second longitudinal beam. In the preferred embodiment, the rafter supports are thus divided into two equally long sections. In this way, the minimum rafter height is achieved when both sections of the supports have the same slope to the roof plane. In principle, however, it is also conceivable to design the first and second sections with different lengths.

[0025] In a preferred embodiment, the first longitudinal member and the second longitudinal member are designed as a gutter-shaped profile, each with two lateral edges extending in a longitudinal direction to drain water running off the flat roof elements. The longitudinal members thus simultaneously form gutters, or the longitudinal members are formed by the gutters. The gutter-shaped profile can be U-shaped or box-shaped, with the latter being preferred. To allow rainwater to drain from the gutter-shaped profile, the longitudinal members can each have a slope in their direction of extension.

[0026] It is further preferred if the rafters only rest on the lateral edge of the first longitudinal member that is closer to the second longitudinal member. It is further preferred if the rafters only rest on the lateral edge of the second longitudinal member that is closer to the first longitudinal member. In other words, the preferred embodiment provides that the rafters do not extend over or beyond the gutter-shaped longitudinal members, but only reach to and rest on the inner edge of the longitudinal members. This has several advantages. Firstly, the gutter formed by the gutter-shaped longitudinal member is accessible from above so that it can be cleaned. In addition, it also makes it possible to pull the outer side of the longitudinal members up as a panel so that it conceals the rafters from the outside. There is then no need to attach an additional panel to the outside of the longitudinal member.

[0027] The latter then leads to the fact that, in a further preferred embodiment, the lateral edge of the first longitudinal member which is closer to the second longitudinal member has a lower height perpendicular to the roof plane than the lateral edge which is further away from the second longitudinal member. It is furthermore preferred if the lateral edge of the second longitudinal member which is closer to the first longitudinal member has a lower height perpendicular to the roof plane than the lateral edge which is further away from the first longitudinal member. Consequently, in the preferred embodiment, the channel-shaped longitudinal members are not designed to be symmetrical in the longitudinal direction, but rather have a high side wall and a flatter side wall. The lower side wall always faces the roof surface. The rafters and, if applicable, also the flat roof elements rest on it.

[0028] The taller side wall faces away from the roof surface, forming the outer wall of the longitudinal beam. The outer wall can be used as a surrounding fascia or at least as part of the surrounding fascia. Furthermore, the taller outer wall prevents the gutter from overflowing. The gutter is extended toward the roof surface by the flat roof elements adjoining the gutters, preventing it from overflowing. By using a low, interior side wall on the gutter-shaped roof beam, the height of the roof structure is further reduced.

[0029] Preferably, the first section and the second section of each support are each inclined at an angle of 0.5° to 10° to the roof plane, more preferably at an angle of 1° to 5°, and even more preferably at an angle of 2° to 4°. The specific selection of the most suitable angle is based on the balance between achieving the lowest possible rafter height and, at the same time, achieving sufficiently high rainwater drainage to prevent puddles from forming. For example, the first section and the second section of the supports can each be inclined at an angle of 3.5° to the roof plane.

[0030] In a preferred embodiment, the aperture height is a maximum of 25 cm and preferably a maximum of 20 cm.

[0031] Furthermore, it is preferred if the cover extends perpendicular to the roof plane over the entire height of the longitudinal beams and rafters, so that the entire roof structure is concealed when the roof structure and the cover are projected onto a vertical plane perpendicular to the roof plane. The cover can be formed perpendicular to the roof plane in one or more parts, for example, from different components of the roof structure. The sections of the cover that conceal different sides of the roof structure, i.e., in particular, the long sides and the transverse sides, are generally formed from different parts.

[0032] In a second aspect, the problem underlying the invention is solved by a conservatory or patio roof with two or more posts and a roof structure according to one of the preceding embodiments. The posts support the roof structure. The roof plane runs horizontally. The roof structure is supported by at least two posts when the first or second longitudinal beam is attached to a building wall. However, it is preferred to use at least four posts or corner posts, so that the first longitudinal beam and second longitudinal beam are each supported by two posts.

[0033] With regard to the advantages and details of the design of the conservatory or patio roof, reference is made to the above explanations of the respective designs of the roof construction that are used as part of the conservatory or patio roof.

[0034] The invention will be described in more detail below with reference to the drawings showing an embodiment of a winter garden with an embodiment of a roof construction, in which Figure 1a perspective view of a first embodiment of a winter garden, Figure 2a further perspective view of the embodiment of Figure 1 with side glazing, Figure 3 a perspective view of details of the roof construction of the embodiment from Figure 1 , Figure 4 a further perspective view of details of the roof construction of the embodiment from Figure 1 , Figure 5 a first side view of the embodiment of a winter garden from Figure 2 , Figure 6 a second side view of the embodiment of a winter garden from Figure 2 , Figure 7 a perspective view of the embodiment of Figure 1from below and Figure 8 a schematic cross section through a detail of the embodiment from Figure 1 .

[0035] The Figures 1 to 8 show an embodiment of a winter garden 1 with a roof structure 3. The winter garden 1 has four posts or corner posts 5 that support the roof structure 3. The corner posts 5 run vertically and are in the Figure 1 In the embodiment shown, they are all the same length, so that the roof structure 3 is arranged at a uniform height above the ground and is thus horizontal. The corner posts 5 can be composed of several aluminum profiles 7, as in Figure 7 can be seen in which the embodiment from Figure 1 shown from below. To Figure 7 In order not to overload the system with reference symbols, the aluminum profiles 7 were provided with reference symbols only for one of the four posts 5.

[0036] The roof structure 5 is built on two longitudinal beams 9a, 9b, each extending between two posts 5. The two longitudinal beams 9a, 9b run parallel to each other and define a common roof plane that is perpendicular to the roof posts 5. The longitudinal beams 9a, 9b are each gutter-shaped profiles and form the gutters of the roof structure 3. Figure 8shows a schematic sketch of one of the longitudinal beams 9a, 9a, in which the gutter-shaped profile or the gutter 10 formed thereby is clearly visible. The longitudinal beam 9a, 9b has a box-shaped cross-section with a flat base 11 and two lateral edges 13, 15 of different heights perpendicular to the base 11. The inner edge 15 of the first longitudinal beam 9a, which faces the second longitudinal beam, is flatter or less high than the outer edge 13 of the first longitudinal beam 9a, which faces the second longitudinal beam 9b. The second longitudinal beam 9b is constructed accordingly. The gutters 10 drain into downpipes formed within the posts 5 and not shown in the figures.

[0037] In the exemplary embodiment shown in the figures, nine identical rafters 17 rest on the longitudinal beams 9a, 9b, extending perpendicular to the longitudinal beams 9a, 9b and parallel to the roof plane, as well as parallel to one another. In the figures, only a few of the rafters 17 are identified by reference numerals in order not to overload the figures with reference numerals. This also applies to many other components of the roof structure 3 and the conservatory 1, since the roof structure 3 is made up of many identical elements. To avoid unnecessary repetition, it is not pointed out individually for each element below that not every occurrence of this element in the figures has been provided with a reference numeral.

[0038] The rafters 17 are T-beams made of aluminum, with a web 19 extending in a rafter direction 23 and a flange 21 extending perpendicularly from the web 19. The rafters 17 each rest with the flange 21 on the longitudinal beams 9a, 9b, specifically on the inner lateral edge 15 of the channel-shaped profiles, as can be seen in particular in the Figures 1 to 3and 9. The rafters 17 do not protrude, or at least not significantly, into the gutters 10 formed by the longitudinal beams 9a, 9b, so that these are accessible from above. In addition, this makes it possible to raise the outer edge 13 of the longitudinal beams 9a, 9b so that a sufficiently deep gutter 10 and already part of a circumferential panel 25 is formed. The height Hs of the rafters 17, i.e. their dimension perpendicular to the roof plane, is constant over the entire length of the rafters 17 from the first longitudinal beam 9a to the second longitudinal beam 9b. The rafters 17 can therefore be formed from commercially available T-beams. The web 19 of each rafter 17 has two outer walls 27, each of which extends perpendicular to the roof plane and in the rafter direction 23.

[0039] In the embodiment in the Figures 1 to 8Two L-shaped profiles 29 made of aluminum were attached to each outer wall 27 of a rafter 17, forming a support 31 for roof elements 33. The right angle formed between the two legs of the L-shaped profiles 29 points downwards and towards the web 19 of the respective rafter 17. Therefore, the L-profiles 29 are Figures 1 to 8 not necessarily recognizable as such. The supports 31 support the roof elements 33. Therefore, they generally only need to be provided on the outer walls 27 of rafters 17 that face another rafter 17, because roof elements 33 are always only placed between two adjacent rafters 17. In the exemplary embodiment, however, all rafters 17 on both outer walls 27 have L-shaped profiles. This facilitates the manufacture of the roof structure 3, since only one type of rafter 17 needs to be manufactured.

[0040] The rafters 17 are prestressed between the longitudinal beams 9a, 9b in such a way that they do not bend beyond the roof plane onto the ground, i.e., in the direction of gravity, under the load of the flat roof elements 33. The surface of the flange 21 facing the ground thus has a concave or flat shape, but not a convex shape. This prevents a lowest point along the rafters 17 between the longitudinal beams 9a, 9b where condensation would collect and drip off.

[0041] The supports 31 formed by the L-shaped profiles are divided into two sections 35a, 35b. Each of the sections 35a, 35b is formed by an L-shaped profile 29. The first section 35a directly adjoins the first longitudinal beam 9a, while the second section 35b begins at the second longitudinal beam 9b. The two sections 35a, 35b meet in the middle of the roof structure 3, so that the two sections 35a, 35b are essentially the same length. The two sections 35a, 35b differ in the direction in which they descend towards the roof plane or the longitudinal beams 9a, 9b. The inclination of the sections 35a, 35b is determined by the L-shaped profiles 29, which are attached to the outer walls 27 of the rafters 17 at a corresponding angle 37.

[0042] The angle 37 between the sections 35a, 35b and the roof plane, which also corresponds to the angle 37 between the sections 35a, 35b and the flanges 21 of the T-beams forming the rafters 17, is in the embodiment shown in the Figures 1 to 7 approximately 3.5°. This slope is sufficient for rain or meltwater to flow from the flat roof elements 33 into the gutters formed by the longitudinal beams 9a, 9b and to prevent puddles from forming on the roof elements 33. In this context, we would like to point out that Figure 8 is merely a schematic sketch that does not represent the structure of the roof construction to scale.

[0043] By dividing the supports 31 into two sections 35a, 35b with opposite gradients, the required height of the rafters 17 can be approximately halved compared to a lean-to roof conventionally used for conservatories. In combination with the shortened inner edge 15 of the longitudinal beams 9a, 9b, on which the rafters 17 rest, a roof structure 3 for a conservatory of conventional dimensions with a height HD of 20 cm or less can be provided, which nevertheless has a sufficient gradient to drain rain and meltwater. The height HD of the roof structure is understood here to be the sum of the height of the inner edge 15 of the longitudinal beams 9a, 9b and the rafter height Hs, i.e. the height HD of the roof structure without the cover, which results when the roof structure is projected onto a vertical plane running perpendicular to the roof plane.

[0044] Due to the low height HD of the roof structure 3, a flatter panel 25 can also be used, which surrounds the roof structure 3 and conceals it from the outside. The effect of the panel is particularly noticeable in the Figures 5 and 6 to recognize, in which a longitudinal view ( Figure 5 ) and a cross view ( Figure 6 ) of the conservatory 1. In both figures, the roof structure 3 disappears completely behind the fascia 25, giving the impression of a flat roof from the outside. The fascia 25 is only approximately half as high as the fascia that would be required for a lean-to roof covering the same area.

[0045] The circumferential aperture 25 is in the embodiment in the Figures 1 to 8composed of several parts. On the transverse sides 37, which extend between the longitudinal members 9a, 9b, the cover 25 is composed of two angle profiles, although this is not shown in detail in the figures. On the longitudinal sides 41, which are formed by the longitudinal members 9a, 9b, the cover 25 is constructed in three parts. The lowermost part of the cover 25 is formed by the outer lateral edge 13 of the longitudinal members 9a, 9b, the middle part by a sheet metal 41, and the uppermost part by an angle profile 43. Figure 8 In the diagram in which the three parts 13, 41, and 43 are most clearly visible, a gap is shown between each of the three parts. However, this only serves to graphically separate the three parts 13, 41, and 43 from each other.

[0046] The winter garden 1 also has a series of vertical glass elements 45, which, however, are only in the Figures 2 , 3 , 5 and 6The vertical glass elements 45 are held in frames which are known from the prior art and are therefore not explained in detail here. Arrows are shown on the glass elements 45, which indicate in which direction the respective vertical glass element 45 can be moved. In the winter garden 1 in the Figures 1 to 8 It is a cold winter garden that is not heated. List of reference symbols

[0047] 1 Winter garden 3 Roof construction 5 Posts, corner posts 7 Profiles 9a, 9b Longitudinal beams 10 Gutter 11 Bottom of the longitudinal beam 13 Outer lateral edge of the longitudinal beam 15 Inner lateral edge of the longitudinal beam 17 Rafter 19 Web 21 Girder 23 Rafter direction 25 Fascia 27 Outer wall of the rafter 29 L-shaped profiles 31 Supports 33 Roof elements 35a, 35b Sections of the supports 37 Angle between roof plane and supports 39 Cross sides 41 Sheet metal 43 Angle profile 45 Glass elements H s Rafter height HD Height of the roof structure HB Height of the fascia

Claims

1. Roof construction (3) for a conservatory (1) or a patio roof, comprising a first longitudinal beam (9a) and a second longitudinal beam (9b), wherein the first longitudinal beam (9a) and the second longitudinal beam (9b) extend parallel to one another in a roof plane, wherein a plurality of rafters (17) extend between the first longitudinal beam (9a) and the second longitudinal beam (9b), wherein the plurality of rafters (17) extend parallel to one another, perpendicular to the longitudinal beams (9a, 9b), and parallel to the roof plane, wherein each of the rafters (17) has a continuous web (19), wherein the continuous web (19) extends continuously from the first longitudinal beam (9a) to the second longitudinal beam (9b) parallel to a rafter direction (23), wherein each of the webs (19) has two outer surfaces (27) that run perpendicular to the roof plane and parallel to the rafter direction (23),wherein, for supporting flat roof elements (33) between two adjacent rafters (17), a support (31) is fastened to each outer surface (27) of a web (19) facing an adjacent rafter (17), wherein the support (31) forms a gradient towards the first longitudinal member (9a) in a first section (35a) extending away from the first longitudinal member (9a), and wherein the support (31) forms a gradient towards the second longitudinal member (9b) in a second section (35b) extending from the first section (35a) to the second longitudinal member (9b), and wherein the roof construction (3) is surrounded by a circumferential panel (25) which extends parallel to the roof plane and which has a panel height (H, B ) perpendicular to the roof plane which is greater than a maximum rafter height (Hs) perpendicular to the roof plane.

2. Roof construction (3) according to claim 1, wherein the supports (31) are formed by support elements, wherein each support element is at least partially materially fastened to the outer surface (27) of the web (19) of the respective rafter (17).

3. Roof construction (3) according to claim 2, wherein the support elements are formed by L-profiles or angle profiles and / or wherein the support elements are welded in a material-locking manner to the web (19) of the respective rafter (17).

4. Roof construction (3) according to claim 1, 2 or 3, wherein a rafter height (Hs) of the web (19) perpendicular to the roof plane between the first longitudinal member (9a) and the second longitudinal member (9b) is constant.

5. Roof construction (3) according to one of the preceding claims, wherein the rafters (17) are designed as T-beams with a belt (21) extending vertically from the web (19) on both sides, wherein the rafters (17) rest with the belt (21) on the first longitudinal beam (9a) and the second longitudinal beam (9b).

6. Roof construction (3) according to one of the preceding claims, wherein the rafters (17) are prestressed between the longitudinal beams (9a, 9b) in such a way that the rafters (17) do not bend under the load of the flat roof elements (33) in such a way that a surface of the rafter (17) facing a ground assumes a convex shape.

7. Roof construction (3) according to one of the preceding claims, wherein the first section of each support (31) extends from the first longitudinal member (9a) to a center of the respective rafter (17) and wherein the second section of each support (31) extends from a center of the respective rafter (17) to the second longitudinal member (9b).

8. Roof construction (3) according to one of the preceding claims, wherein the first longitudinal member (9a) and the second longitudinal member (9b) are designed as a channel-shaped profile, each with two lateral edges (13, 15) extending in a longitudinal direction, in order to drain water running off the flat roof elements (33).

9. Roof construction (3) according to claim 8, wherein the rafters (17) rest only on the lateral edge (15) of the first longitudinal member (9a) which is closer to the second longitudinal member (9b), and / or wherein the rafters (17) rest only on the lateral edge (15) of the second longitudinal member (9b) which is closer to the first longitudinal member (9a).

10. Roof construction (3) according to claim 8 or 9, wherein the lateral edge (15) of the first longitudinal member (9a) which is closer to the second longitudinal member (9b) has a lower height perpendicular to the roof plane than the lateral edge (13) which is further away from the second longitudinal member (9b), and / or wherein the lateral edge (15) of the second longitudinal member (9b) which is closer to the first longitudinal member (9a) has a lower height perpendicular to the roof plane than the lateral edge (13) which is further away from the first longitudinal member (9a).

11. Roof construction (3) according to one of the preceding claims, wherein the first section (35a) and the second section (35b) of each support (31) are each inclined at an angle of 0.5° to 10° to the roof plane, preferably inclined at an angle of 1° to 5° to the roof plane and more preferably inclined at an angle of 2° to 4° to the roof plane.

12. Roof construction (3) according to one of the preceding claims, wherein the panel height (H B ) is a maximum of 25 cm and preferably a maximum of 20 cm.

13. Roof construction (3) according to one of the preceding claims, wherein the cover height (Hs) perpendicular to the roof plane is greater than a combined height of the longitudinal beams (9a, 9b) and the rafters (17) perpendicular to the roof plane, so that the entire roof construction (3) is concealed when the roof construction (3) and the cover (25) are projected onto a vertical plane running perpendicular to the roof plane.

14. Conservatory (1) or patio roofing with two or more posts (5) and a roof structure (3) according to one of the preceding claims, wherein the posts (5) support the roof structure (3) and the roof plane runs horizontally.

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