Self-Adhering Drainage/Ventilation Barrier Without Mechanical Fasteners
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Solution Overview
Problem
Existing moisture intrusion issues in building structures due to holes created by mechanical fasteners used to attach barrier products, such as house wraps, are not adequately addressed by current drainage/ventilation barrier systems.
Innovation Solution
A self-adhering drainage/ventilation product comprising a weather barrier membrane, drainage structure, moisture-resistant layer, adhesive layer, and release layer, which are applied without mechanical fasteners, allowing for a unitary, multilayered structure that minimizes moisture intrusion and facilitates ventilation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If mechanical fasteners are used to attach barrier products to the building structure, then the barrier product can be securely fastened, but holes are created that allow moisture intrusion
Solution Approach 1:
The patent replaces the mechanical fastening system (nails, staples, screws) with a chemical adhesion system using pressure-sensitive adhesive. This substitution eliminates the need for penetrating fasteners that create holes, thereby preventing moisture intrusion while maintaining secure attachment of the barrier product to the building structure.
Solution Approach 2:
The patent changes the attachment mechanism from mechanical penetration to chemical bonding through pressure-sensitive adhesive. This parameter change in the attachment method allows the barrier to be securely fastened without creating holes, thus resolving the contradiction between attachment strength and moisture intrusion prevention.
2Reliability
If a unitary multilayered structure is used, then moisture intrusion is minimized, but the device complexity increases
Solution Approach 1:
The patent combines multiple functional layers (barrier layer, drainage layer, ventilation layer, and adhesive layer) into a single unitary multilayered structure. This merging of functions into one integrated product achieves reliable moisture intrusion resistance while eliminating the need for separate components and their associated fastening systems, thereby managing the complexity through consolidation rather than proliferation of parts.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces moisture intrusion and enhances ventilation by eliminating the need for mechanical fasteners, ensuring a durable and breathable barrier system with improved moisture management.
Implementation Method 1
an adhesive layer, the adhesive layer is a plurality of adhesive strips and/or scatter coated adhesive over and co-extensive with the moisture resistant layer, the adhesive is a pressure sensitive adhesive (PSA)
Data Source
AI summary
A drainage/ventilation product is placed in a building structure. The product includes: a weather barrier membrane faces away from the building structure; a drainage structure affixed to and co-extensive with the weather barrier membrane; a moisture resistant layer affixed to and co-extensive with the drainage structure; an adhesive layer, the adhesive layer is a plurality of adhesive strips and/or scatter coated over and co-extensive with the moisture resistant layer, the adhesive is a pressure sensitive adhesive (PSA) and has a pull adhesion in a range of about 10-21 psi, and covers about 40-95% of a surface of the moisture resistant layer; and a release layer releasably covers and is co-extensive with the adhesive layer. Whereby the moisture/ventilation product is placed on the building structure without mechanical fasteners. A method is also disclosed.