Membrane roofing
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Solution Overview
Problem
Current roofing constructions face challenges in providing cost-effective installation while maintaining uplift load resistance and retaining exterior construction materials like shingles and siding, especially under severe environmental conditions such as high winds and hail.
Innovation Solution
A construction underlayment featuring a rigid foam board with a reinforcing facing including a flexible base and an array of touch fastener elements, which are bonded to the foam board to enhance adhesion and resistance to uplift forces, and can include additional features like a tie layer with reinforcing scrim for improved dimensional stability and fire resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional roofing constructions are used, then installation is simpler and cost-effective, but uplift load resistance is insufficient under severe environmental conditions
Solution Approach 1:
The patent employs composite construction by bonding a reinforcing facing (including fabric or mesh layers) to rigid insulation boards. This creates a composite panel system where the facing provides tensile strength and crack resistance while the insulation provides thermal performance and structural support, together achieving superior uplift load resistance compared to conventional separate-layer constructions.
Solution Approach 2:
The patent merges multiple functions into integrated components: the reinforcing facing is bonded directly to the insulation board to form a unified panel that simultaneously provides structural reinforcement, thermal insulation, and a substrate for membrane attachment. This integration simplifies installation while maintaining high uplift resistance.
2Temperature
If membrane roofing is secured over rigid insulation boards, then thermal barrier properties are improved, but resistance to wind uplift and separation is insufficient
Solution Approach 1:
The patent creates a composite panel system by bonding a reinforcing facing (fabric or mesh) to rigid insulation boards. This composite structure combines the thermal insulation properties of the rigid board with the tensile strength and crack resistance of the facing material, achieving both thermal performance and wind uplift resistance simultaneously.
Solution Approach 2:
The patent allows the reinforcing facing to bridge across cracks and irregularities in the insulation board, creating a continuous reinforced surface that distributes wind uplift loads evenly across the panel assembly, preventing localized failure and membrane separation.
3Object-affected harmful factors
If exterior construction materials are retained to buildings, then protection from environmental forces is improved, but installation cost and complexity increase
Solution Approach 1:
The patent combines the insulation board and reinforcing facing into a pre-bonded composite panel, which simplifies installation by reducing the number of separate materials and steps required. The integrated panel provides both thermal protection and environmental force resistance, eliminating the need for separate reinforcement layers and reducing labor costs.
Solution Approach 2:
The pre-bonded composite panel integrates multiple protective functions into a single installable unit, providing cost-effective protection against environmental forces while maintaining simplicity in installation procedures.
Data Source
AI summary
A foam roofing underlayment is provided with a reinforcement membrane having an array of fastener elements for engaging fastener elements on a flexible roof membrane. The underlayment is formed by molding foam between the reinforcement membrane and a carrier membrane. The underlayment in secured to the roof using washers having fastener elements for engaging the fastener elements of the flexible roof membrane. An anti-peel flap with fastener elements is provided around the periphery of the washers. A slip sheet is used between the underlayment and the flexible roof membrane to permit accurate positioning of the flexible roof membrane prior to engagement of the fastener elements. The interstices between the fastener elements provide lateral moisture paths to vents in the flexible roof membrane.