Fleece-Backed Flashing Assembly for Polymeric Roof Seals
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Solution Overview
Problem
Conventional liquid flashing compositions form an inferior bond with polymeric panels in roofing systems, failing to create a watertight seal effectively.
Innovation Solution
A flashing assembly using a fleece-backed flashing membrane with a polymeric membrane component and a fabric component, where a liquid flashing composition is applied to the fabric component and bonds to both the membrane system and a vertical structure, forming a cured residue for a secure seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional liquid flashing compositions are applied directly to polymeric panels, then the application process is simple, but the bonding performance is inferior and fails to create an effective watertight seal
Solution Approach 1:
A fleece backing is introduced as an intermediary layer between the liquid flashing composition and the polymeric panel. The fleece backing provides a surface that enhances adhesion for the liquid flashing composition, while the polymeric membrane portion bonds to the polymeric panel. This intermediary structure resolves the bonding issue without complicating the overall application process.
Solution Approach 2:
The flashing assembly uses a composite structure combining a polymeric membrane portion and a fleece backing. This composite material approach allows the liquid flashing composition to bond effectively to the fleece backing while the polymeric membrane portion integrates with the roof membrane system, achieving both ease of application and reliable bonding.
2Productivity
If liquid flashing composition is applied without fabric reinforcement, then the application is faster and simpler, but the seal strength and watertight performance are insufficient
Solution Approach 1:
The invention merges the liquid flashing composition application with a fabric reinforcement (fleece backing) into a single integrated flashing assembly. The fabric reinforcement is incorporated into the assembly before or during application, providing structural strength and seal integrity while maintaining application efficiency through a unified process.
3Strength
If flashing assemblies use traditional membrane flashings welded to the membrane system, then the bonding is strong, but the process complexity and installation difficulty increase
Solution Approach 1:
The invention replaces the mechanical welding process with a chemical bonding approach. The liquid flashing composition chemically bonds to the fleece backing and the polymeric membrane portion adhesively bonds to the roof membrane system, eliminating the need for welding equipment and complex installation procedures while maintaining strong bonding.
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 provides a robust and watertight seal between polymeric roofing membranes and vertical structures, enhancing the bonding performance of liquid flashing compositions with polymeric panels.
Implementation Method 1
a cured residue layer of a liquid flashing composition extending from said fabric component of said fleeced flashing membrane to a surface of said vertical structure
Implementation Method 2
said cured residue being bonded to said fabric component and said surface of said vertical structure
Implementation Method 3
said polymeric membrane component being bonded to said membrane system
Data Source
AI summary
One or more embodiments of the present invention provide A roofing system comprising (i) a roof deck; (ii) a vertical structure extending from said roof deck; (iii) a membrane system covering said roof deck; and (iv) a flashing assembly creating a water-proof seal between said membrane system and said vertical structure, where said flashing assembly includes a flashing composite having a polymeric membrane component and a fabric component, said polymeric membrane component being bonded to said membrane system, and said flashing assembly further including a cured residue layer of a liquid flashing composition extending from said fabric component of said fleeced flashing membrane to a surface of said vertical structure, and said cured residue being bonded to said fabric component and said surface of said vertical structure.