Composite Moisture Barrier Sheet for Cavity Wall Drainage
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Solution Overview
Problem
Existing moisture barriers for cavity walls are inadequate in preventing moisture transmission between interior and exterior walls, and there is a need for a system that effectively directs moisture away from the interior wall while ensuring fire safety and ease of installation.
Innovation Solution
A moisture barrier system comprising a barrier sheet with an interior reinforcement mesh and an outer polymeric layer, supported by a sheet support system that includes sealant, corner units, and a surface fixing system with fasteners, which is designed to be installed between interior and exterior walls to create a continuous moisture barrier and direct moisture towards exit apertures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing moisture barriers are used for cavity walls, then installation is simple, but moisture transmission prevention is inadequate
Solution Approach 1:
The barrier sheet employs a composite structure consisting of a polymeric outer layer combined with an interior reinforcement mesh. This composite material provides both effective moisture transmission prevention through the polymeric layer and structural integrity through the reinforcement mesh, resolving the contradiction between reliability and complexity by integrating multiple functions into a single composite component.
2Strength
If a reinforcement mesh is added to the barrier sheet, then structural integrity improves, but manufacturing complexity increases
Solution Approach 1:
The reinforcement mesh and polymeric outer layer are merged into a single integrated barrier sheet structure. The mesh is positioned within the polymeric layer during manufacturing, creating a unified component that provides both strength and moisture barrier functionality. This merging approach improves structural integrity while avoiding the need for separate assembly steps that would increase manufacturing complexity.
Data Source
AI summary
A moisture barrier system, comprising a barrier sheet adapted to be installed on a building having an interior wall structure and an exterior wall structure spaced apart from the interior wall structure to define a cavity there between.