Lightweight Roofing Shingle With Fabric Backing to Cut Weight
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Solution Overview
Problem
Conventional asphalt roofing shingles are heavy, costly due to the use of asphaltic materials and fine granular aggregates, and pose challenges in transportation, installation, and manufacturing due to their weight and abrasive nature, which also leads to equipment wear and exposure risks for workers.
Innovation Solution
The development of a lightweight asphalt roofing shingle that eliminates the asphalt coating layer and fine aggregate backing particles, replacing them with a reinforcing fabric or film layer on the underside, along with a release tape to prevent sticking during handling and storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional asphalt coating layers and fine granular aggregates are used, then the shingle has sufficient durability and weather resistance, but the weight increases and transportation cost rises
Solution Approach 1:
The patent changes the material parameters by replacing heavy asphaltic materials and fine granular aggregates with lighter alternative materials that maintain protective functions. This includes using lighter coating compositions and alternative backing materials that reduce overall shingle weight while preserving durability and weather resistance.
Solution Approach 2:
The patent extracts and removes the heavy asphalt coating layers and fine granular aggregate backing from the shingle structure. By eliminating these traditional heavy components and replacing them with lighter alternatives, the shingle weight is reduced while maintaining the necessary protective and functional properties.
2Stability of the object's composition
If fine granular aggregate material is applied to the back surface, then the shingles do not stick together during stacking, but the manufacturing cost increases and equipment wear intensifies
Solution Approach 1:
The patent removes the fine granular aggregate backing material from the shingle construction. By extracting this problematic material, the patent eliminates the issues of increased manufacturing cost, equipment wear from abrasive particles, and worker exposure risks, while maintaining shingle stacking stability through alternative means.
Solution Approach 2:
The patent replaces expensive fine granular aggregates with more economical alternative backing materials or treatments that provide the necessary non-sticking function during stacking and transport, thereby reducing manufacturing costs while maintaining functionality.
3Stability of the object's composition
If fine aggregate particulates are used as backing material, then the shingles maintain their position during transport, but worker exposure to dust and emissions increases
Solution Approach 1:
The patent extracts and eliminates fine granular aggregate particulates from the shingle backing. By removing these abrasive, dust-generating materials, the patent significantly reduces worker exposure to harmful dust and emissions during manufacturing, handling, and installation, while maintaining shingle position stability through alternative methods.
Data Source
AI summary
A lightweight roofing shingle comprising a saturated mat having an exposed side and an unexposed side wherein a fabric reinforcing layer substantially replaces the bottom asphalt coating and the backing aggregate on the unexposed side of a conventional shingle. The lightweight shingle will have a top asphalt layer applied to the exposed side of the mat and a layer of granular material applied to the top asphalt layer opposite the mat per conventional construction, and the fabric reinforcing layer is adhered directly to the unexposed side of the saturated mat. In one embodiment, the fabric reinforcing layer covers an entire area of the unexposed side of the saturated mat. The reinforcing layer may preferably be a nonwoven fabric made from PET or polypropylene. The lightweight roofing shingle may also include a release tape layer applied to the reinforcing layer opposite the saturated mat.