Granule loss in spray foam (SPF) roofing occurs when the protective layer of granules embedded in the foam starts to detach or wear away. This granule topcoat acts as a shield, protecting the foam from UV damage, foot traffic, and weathering. Over time, factors like heavy sun exposure, storms, foot traffic, or poor initial installation can cause the granules to loosen and shed. Sometimes, normal aging leads to some gradual granule loss, but excessive or patchy granule loss usually signals more serious wear or damage underneath the protective layer. If left untreated, exposed foam can become brittle and develop cracks, leading to leaks and water intrusion. Simple diagnostics involve inspecting the roof for areas where the granules are missing, looking for discoloration, soft spots, or crumbling foam. Homeowners can safely do a visual check from a ladder or roof edge, but avoid walking on the foam to prevent damage.
If granule loss is noticed, minor touch-ups can sometimes be done with patch kits designed for SPF roofs, but extensive damage requires professional attention. Calling a roofer familiar with spray foam systems is important to assess whether a simple sealant application will suffice or if a reroofing is needed. When speaking with a contractor, ask clearly about the cause of the granule loss and the expected lifespan after repairs. Also, inquire how their fix will affect your roof’s existing warranty, especially since SPF roofs often come with specific maintenance requirements. A good roofer should provide a clear explanation and recommend solutions that restore protection without voiding your warranty.