Installation
What is Low-Slope Application?
Roofing Glossary · Installation
Definition
Roofing installation on pitches between 2:12 and 4:12 that require special low-slope underlayment systems or alternative materials to compensate for reduced water-shedding capacity. Asphalt shingles installed on low slopes require double underlayment, low-slope starter strips, and closer nail patterns per manufacturer guidelines. Many shingle warranties are voided on pitches below the minimum specified slope.
Related Roofing Terms
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Roof PitchThe steepness of a roof expressed as a ratio of vertical rise to horizontal run — for example, 6:12 ...
→TPOThermoplastic Polyolefin — a single-ply white or light-colored roofing membrane widely used on low-s...
→EPDMEthylene Propylene Diene Monomer — a synthetic rubber roofing membrane available in black or white, ...
→Modified BitumenA factory-reinforced asphalt roofing membrane modified with APP (atactic polypropylene) or SBS (styr...
→UnderlaymentA water-resistant or waterproof barrier material installed directly over the roof decking and beneat...
More Installation Terms
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