Polymeric Fastener Sleeve for Self-Sealing Sheathing Panels
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Solution Overview
Problem
The labor-intensive and prone-to-leaks application of sealants or tapes is required to achieve water-resistance and air-tightness at fastener points in building panels, which can be improved by integrating self-sealing fasteners that eliminate the need for separate sealing materials.
Innovation Solution
The use of self-sealing fasteners with a collating sleeve and cylindrical sheaths made from polymeric materials, such as polyurethane or PVC, that compress around the fasteners to create a seal between the fastener head and the panel, maintaining air and water barrier properties without additional sealing materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sealants or tapes are applied to fastener points to achieve water-resistance and air-tightness, then the water and air barrier properties are improved, but the installation process becomes labor-intensive and time-consuming
Solution Approach 1:
The patent combines the sealing function with the fastener itself by integrating a cylindrical sheath made of polymeric material around the fastener shaft. This merging eliminates the need for separate sealants or tapes, as the sealing action is performed automatically by the sheath compressing against the panel surface when the fastener is driven in, thus improving installation efficiency while maintaining reliable water and air barrier properties.
Solution Approach 2:
The cylindrical sheath is designed to automatically perform the sealing function without requiring separate sealing materials or additional manual sealing steps. As the fastener is driven through the panel, the sheath compresses against the panel surface and seals around the fastener head, creating a self-sealing mechanism that eliminates labor-intensive sealant application while ensuring consistent water and air tightness.
2Reliability
If separate sealants and tapes are used to seal fastener points, then water-resistance is achieved, but the device complexity and number of components increase
Solution Approach 1:
The patent merges the sealing function into the fastener assembly by incorporating a cylindrical sheath that surrounds the fastener shaft. This integration reduces the system from multiple separate components (fastener plus sealant plus tape) to a single integrated self-sealing fastener, simplifying the overall device while maintaining effective water resistance through the sheath's compression seal.
3Reliability
If sealants are applied manually to each fastener point, then air-tightness is achieved, but the installation time and labor requirements increase
Solution Approach 1:
The cylindrical sheath is designed to automatically create an air-tight seal around the fastener head as the fastener is driven through the panel. The sheath compresses against the panel surface and seals around the fastener, performing the sealing action automatically during the fastening process itself. This eliminates the need for separate manual sealant application steps, significantly reducing installation time while ensuring consistent air-tightness at each fastener point.
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 self-sealing fasteners effectively maintain the air and water resistance of the sheathing panels, preventing leaks and reducing installation time by eliminating the need for separate sealants, while ensuring bulk water resistance and low air infiltration rates.
Implementation Method 1
cylindrical sheaths made from polymeric materials, such as polyurethane or PVC, that compress around the fasteners to create a seal
Data Source
AI summary
A sheathing panel is described, including at least one barrier overlay secured to a panel, a plurality of fasteners engaged in the barrier overlay and the panel, a plurality of sealing cylindrical sheaths surrounding a portion of each fastener and positioned between the fastener and the barrier overlay, such that the sheathing panel has at least one of the following properties: a water vapor transmission rate of at least 7.0 grams/m2/24 hours at 73° F. and 50% relative humidity (RH), a water vapor permeance of at least 1.3 perms at 73° F. and 50% RH, or an air infiltration rate of less than 0.2 L/s-m2 at 75 pascals. A method of engaging the fasteners with the panel is also provided.