Integrated Air Barrier Assembly with Anti-Blocking Layer
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Solution Overview
Problem
Existing air barrier systems in building construction face challenges in maintaining durability and preventing air leakage, especially when exposed to temperature extremes and fastener penetrations, which require multiple installation steps and can lead to damage during storage and installation.
Innovation Solution
An integrated air barrier assembly with a liquid-applied fastener-sealing layer and an anti-blocking facing layer, where the fastener-sealing layer remains soft to seal around fasteners and the anti-blocking layer prevents sticking or blocking, allowing for single-step installation and enhanced durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the air barrier is placed over the gypsum board or CMU on the exterior side with insulation over it, then the air barrier durability is improved by protecting from temperature extremes, but the installation process becomes complex requiring multiple steps and the fasteners create entry points for air leakage
Solution Approach 1:
The patent combines the air barrier layer and insulation layer into a single integrated assembly with the air barrier material laminated to the insulation board. This merging eliminates the need for separate installation steps of applying air barrier over gypsum board and then adding insulation, reducing installation complexity while maintaining durability through the integrated design that protects the air barrier from temperature extremes.
Solution Approach 2:
The integrated air barrier assembly serves multiple functions simultaneously: the air barrier layer provides air sealing, the insulation layer provides thermal insulation, and their integration provides structural unity. This multi-functionality reduces the number of separate components and installation steps needed, addressing the complexity issue while maintaining the protective function against temperature extremes.
2Reliability
If the air barrier is placed over the gypsum board or CMU on the exterior side with insulation over it, then the air barrier durability is improved by protecting from temperature extremes, but air leakage occurs at fastener penetration points
Solution Approach 1:
The patent employs a flexible air barrier material that is laminated to the insulation board. This flexible film can deform and seal around fastener penetration points, preventing air leakage. The thin film nature allows it to conform to the fastener shaft and create an effective seal, addressing the air leakage issue while maintaining the durability benefits of the integrated assembly protected from temperature extremes.
3Reliability
If the air barrier material is made soft and flexible to seal around fasteners, then fastener sealability is improved, but the boards block or stick together when stacked during storage and shipping
Solution Approach 1:
The patent creates a composite structure with the air barrier layer laminated to the insulation board. The rigid insulation board provides structural support and blocking resistance during storage, while the air barrier layer maintains its soft, flexible properties for fastener sealability. This composite material approach allows each layer to perform its optimal function without compromising the other, resolving the contradiction between flexibility for sealing and rigidity for storage stability.
4Temperature
If aluminum foil layer is provided on insulation board, then heat reflection is improved, but cladding fasteners penetrate the foil layer and form entry points for air leakage
Solution Approach 1:
The patent replaces the rigid aluminum foil layer with a flexible air barrier material that can deform and seal around fastener penetration points. This flexible film maintains the heat reflection property while providing the ability to conform to fasteners and prevent air leakage, eliminating the harmful effect of fastener penetrations through the reflective layer.
Data Source
AI summary
An integrated air barrier assembly is provided as an integral product in which a fastener-sealing layer is secured between opposed surfaces of a board and an anti-blocking facing layer. The assembly exhibits good fastener sealability, including for larger self-drilling screws. The anti-blocking facing layer maintains the fastener-sealing layer inward of the environment and prevents blocking or sticking of the assembly when stacked. In some embodiments, the anti-blocking facing layer can be a metal film or foil, which can reflect heat away from the fastener-sealing layer, thereby maintaining a lower temperature on the fastener-sealing layer. In some embodiments, the board can be an insulating layer or wood layer. The assembly can be readily installed in a single step during construction.