Silicone-Edge Roofing Membranes for Waterproof Lap Seals
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing roofing systems face challenges in forming effective lap seals between roofing membranes to prevent water ingress, particularly on flat roofing substrates, which are prone to leaks.
Innovation Solution
A method involving roofing membranes with specific layer configurations, including a bottom layer of mesh material and a top layer of cured or uncured silicone, where the uncured silicone is exposed and cured to form a lap seal, enhancing the water-resistant or waterproof nature of the membrane overlap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional roofing membranes are used with standard lap sealing methods, then installation is simple and quick, but the lap seals are ineffective and allow water ingress
Solution Approach 1:
The roofing membrane is divided into distinct functional layers: a base membrane layer and a separate lap seal layer. This segmentation allows each layer to perform its specific function - the base membrane provides structural integrity while the lap seal layer specifically addresses water resistance at overlap regions, resolving the contradiction between reliability and complexity by distributing functions across separate components.
Solution Approach 2:
The lap seal layer is formed as a composite structure with hydrophobic material and optionally hydrophilic material, creating a material combination that provides superior water resistance. This composite approach enhances the reliability of the lap seal while maintaining reasonable complexity through the use of layered material structures rather than monolithic designs.
2Reliability
If uncured silicone edge portions are used to form lap seals, then water resistance is improved, but additional curing steps and time are required
Solution Approach 1:
The lap seal layer is pre-formed with uncured silicone material during membrane manufacturing, preparing the sealing surface in advance. This preliminary action allows the membrane to be installed quickly without requiring immediate curing, and the silicone can be cured later through exposure to moisture or heat from the roofing substrate, thus reducing the time loss during installation while maintaining water resistance.
Solution Approach 2:
The uncured silicone in the lap seal layer is designed to self-cure through exposure to environmental moisture or heat from the roofing substrate after installation. This self-service mechanism eliminates the need for external curing equipment or additional manual curing steps, reducing time loss while achieving the desired water resistance.
3Reliability
If overlapping membrane edges are used to form laps, then water ingress is prevented through the lap seal, but the lap area becomes vulnerable to wind uplift and tearing
Solution Approach 1:
The lap seal layer is constructed as a composite material system combining hydrophobic material with optional hydrophilic material, creating a multi-layer structure that provides both water resistance and enhanced mechanical strength. This composite structure prevents water ingress while the layered construction and material properties resist wind uplift forces and tearing, resolving the contradiction between water resistance and structural strength.
Solution Approach 2:
The lap seal layer is applied specifically at the overlap regions where both water resistance and wind uplift resistance are most needed. This localized application of enhanced material properties ensures that the vulnerable lap areas receive concentrated protection without requiring the entire membrane to be strengthened, maintaining the balance between reliability and strength.
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 described method creates a robust, water-resistant or waterproof lap seal between roofing membranes, effectively preventing water ingress and improving the integrity of the roofing system, particularly on flat substrates.
Implementation Method 1
curing the edge portion of the uncured silicone of the second membrane and the edge portion of the uncured silicone of the first membrane
Data Source
AI summary
A method includes obtaining a first membrane; obtaining a second membrane; wherein the first and/or second membrane include an uncured silicone edge portion; installing the first membrane above a roofing substrate; installing the second membrane above the roofing substrate; overlapping the first membrane and the second membrane; curing the uncured silicone edge portion; and providing a lap seal between the first membrane and the second membrane.