Damage & Failure
What is Delamination?
Roofing Glossary · Damage & Failure
Definition
The separation of layers within a laminated shingle or roofing membrane, either between the two asphalt mats in architectural shingles or between plies in a flat roof system. Delamination in architectural shingles is typically a manufacturing defect visible as separation at the shingle's lower edge. In flat roofing, delamination between plies or between the membrane and insulation causes blistering and reduces the system's structural and waterproofing integrity.
Related Roofing Terms
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Architectural ShinglesA premium category of asphalt shingles constructed from two laminated fiberglass mat layers, creatin...
→Membrane FailureThe degradation or rupture of a flat or low-slope roofing membrane system resulting in water infiltr...
→BlisteringThe formation of bubble-like raised areas on the surface of asphalt shingles caused by moisture trap...
→SplittingThe formation of longitudinal cracks in a flat roof membrane due to thermal cycling, substrate movem...
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