Bridging (Roofing)

Bridging (Roofing)

What Does Bridging Mean in Roofing? Bridging is typically seen at roof-to-wall transitions on low-slope membrane roofs, where the roofing material changes direction from horizontal to vertical. Instead of following the shape of the surface below it, the membrane...
Cold Weld

Cold Weld

How Cold Welds Occur Cold welds occur in heat-welded membrane roofs such as TPO and PVC. During installation, adjacent sheets are heated and pressed together to form a continuous waterproof surface. A cold weld occurs when part of that seam does not fully fuse. Cold...
Degranulation

Degranulation

What Does Degranulation Mean for a Roof Granules are the outer shield of asphalt roofing products. They protect the asphalt layer underneath from sun exposure and physical wear. Because granules serve as an asphalt roof’s protective outer layer, the extent of...
Exposed Fastener

Exposed Fastener

Why Exposed Fasteners Matter Most fasteners on shingle roofs are protected under the next course of shingles. When a fastener remains visible, such as on base flashing or on ridge caps, it depends on sealant instead of overlap to protect it. Most fasteners pass...
Ponding

Ponding

What Causes Ponding Water on Low-Slope Roofs Ponding water most commonly appears on flat or low-slope commercial roofs after heavy rainfall. Because these roofs are designed with minimal pitch, water can collect in low areas if slope is insufficient or water’s path to...