Roof assemblies - renovation
The definitive Guide to Cleaning & Treating Asphalt Shingle Roofs
...granule loss and can lead to rot on the roof deck below if the moisture makes it's way through. In cold climates, this trapped water can also freeze, expanding and cracking the shingles and holding onto the snow that can cause ice damming.
Aging Signs: Curling, Cracking, and Granule Loss
Look for shingles that are curl...
