Roofing Shingle Headlap Sheet Structure for Lower Weight and Wind Hold
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Solution Overview
Problem
Conventional asphalt-based roofing shingles are heavy and costly to produce, with limited options for reducing weight and manufacturing efficiency, and existing solutions either increase the shingle's width or do not effectively enhance wind resistance.
Innovation Solution
The use of a roofing shingle design that replaces most of the headlap portion with a water impermeable sheet, reducing weight and cost, and incorporates a coated mat with organic-based coating material, along with a reinforcement member or sealant to improve wind resistance by creating a strong bond between shingles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a conventional asphalt-based roofing shingle is used with full-width coated mat, then wind resistance and durability are maintained, but weight and production cost increase
Solution Approach 1:
The coated mat is segmented to extend only through the buttlap portion rather than the full shingle width, creating a discontinuous reinforcement pattern that reduces weight while maintaining wind resistance where most needed (at the exposed buttlap edge)
Solution Approach 2:
The coated mat provides localized reinforcement in the buttlap portion where wind uplift forces are most critical, rather than uniformly distributing material across the entire shingle width, optimizing the balance between wind resistance and weight reduction
2Productivity
If the coated mat extends through the complete width of the shingle, then wind resistance is improved, but manufacturing efficiency and material usage increase
Solution Approach 1:
The coated mat material is extracted from the headlap portion of the shingle, removing unnecessary material that does not contribute to wind resistance, thereby reducing raw material usage and increasing manufacturing line capacity
3Reliability
If a water impermeable sheet is added to the headlap portion, then wind resistance is improved, but shingle width and complexity increase
Solution Approach 1:
The water impermeable sheet is merged with the coated mat structure, integrating multiple functions (water impermeability and wind resistance reinforcement) into a single composite component rather than adding separate elements
Solution Approach 2:
The water impermeable sheet serves multiple functions simultaneously: providing water impermeability in the headlap portion and acting as a reinforcement layer to improve wind resistance, reducing the need for separate components
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
This design achieves a weight reduction of at least 25% compared to conventional shingles, maintains a similar width, and enhances wind resistance by improving the adhesion between shingles, allowing for faster sealing and stronger bonds at lower temperatures.
Implementation Method 1
a water impermeable sheet adjacent to the coated mat. The sheet has a width that extends from the head edge through at least about 90% of the headlap portion
Implementation Method 2
incorporates a coated mat with organic-based coating material, along with a reinforcement member or sealant to improve wind resistance by creating a strong bond between shingles
Data Source
AI summary
A roofing shingle includes a buttlap portion with a butt edge and a headlap portion with a head edge. The roofing shingle includes a coated mat which is a roofing mat coated with an organic-based coating material. The roofing shingle also includes a water impermeable sheet adjacent to the coated mat. In one embodiment, the headlap portion of the coated mat is mostly replaced by the sheet. In another embodiment, the roofing shingle has a limited width. In a further embodiment, the roofing shingle is reduced in weight compared to a conventional shingle.