Reverse Ballasted Roof System Wind Uplift Resistance
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Solution Overview
Problem
Current roof systems face challenges in wind uplift resistance, energy efficiency for temperature regulation, and installation time and effort, particularly in maintaining internal building temperature and dealing with the complexity of multiple roofing layers.
Innovation Solution
A reverse ballasted roof system is introduced, featuring a structural roof beam with insulation, a first waterproofing membrane, a weighted cover board, and a second waterproofing membrane that seals the weighted cover board, along with an optional method to modernize existing loose laid ballasted systems by removing the ballast layer and installing a weighted cover board with an additional waterproofing membrane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a traditional ballasted roof system is used, then wind uplift resistance is provided by the ballast layer, but the system requires multiple roofing layers and adhesive materials increasing installation complexity
Solution Approach 1:
The patent extracts and removes the traditional ballast layer from the roof system, replacing it with a weighted cover board that provides the necessary wind resistance without requiring multiple additional roofing layers. This simplifies the overall system structure while maintaining wind uplift resistance.
Solution Approach 2:
The patent inverts the traditional ballasted roof configuration by placing the waterproofing membrane beneath the weighted cover board rather than above it. This reversal eliminates the need for adhesive materials and simplifies installation while maintaining the structural integrity and wind resistance functions.
2Strength
If traditional roof systems with multiple layers are used, then wind resistance is achieved, but installation time and effort increase
Solution Approach 1:
The patent merges the functions of the ballast layer and waterproofing membrane into a single integrated assembly where the weighted cover board is positioned directly over the waterproofing membrane. This consolidation reduces the number of separate installation steps and materials required, thereby reducing installation time and effort while maintaining wind resistance.
3Stability of the object's composition
If adhesive materials are used in traditional roof systems, then bonding between layers is achieved, but installation complexity and material requirements increase
Solution Approach 1:
The patent extracts and eliminates adhesive materials from the roof system by using a mechanical bonding approach where the waterproofing membrane is positioned beneath the weighted cover board and secured through the board's weight and structure. This removes the need for adhesive materials while maintaining stable layer bonding.
4Loss of energy
If insulation is positioned close to the structural roof beam, then energy efficiency is improved, but access and installation difficulty increase
Solution Approach 1:
The patent segments the roof assembly into distinct, modular components including the structural roof beam, insulation layer, waterproofing membrane, and weighted cover board. This segmentation allows for easier installation and access during construction, as each component can be positioned independently without requiring complex manipulation of tightly packed layers.
Data Source
AI summary
A converted reverse ballasted roof system is provided including a structural roof beam. Insulation is positioned upwardly adjacent the structural roof beam, and a first waterproofing membrane is arranged upwardly adjacent the first waterproofing membrane. A weighted cover board is disposed upwardly adjacent the first waterproofing membrane and a second waterproofing membrane is installed upwardly adjacent the weighted cover board. The first water proofing membrane and the second waterproofing membrane substantially seal the weighted cover board.