How long does a pitched roof last?

Covering versus structure

When people say a roof is worn out, they almost always mean the outer layer: shingles, underlayment, flashing, and pipe boots. The rafters or trusses and most of the decking are built to last as long as the home, and they only fail early when water gets in for years or the attic overheats and traps moisture.

Why pitch helps

Sloped roofs shed water quickly, so shingles dry fast after rain and debris slides off. Steeper roofs generally drain and dry even faster, which is one reason a steep main roof often outlasts a low-slope porch roof on the same house.

What shortens roof life in Georgia

• Sun and heat: south and west facing slopes take the most UV and heat and usually wear out first. See heat and humidity and roof life.
• Poor attic ventilation: a hot, humid attic bakes shingles from below and can void shingle warranties.
• Trees and debris: shade breeds moss and algae, and piles of leaves and pine straw trap water in valleys.
• Storms: hail and wind can end a roof's life early, regardless of its age.
• Small parts: rubber pipe boots and sealant often fail well before the shingles, causing leaks on otherwise sound roofs.

Signs the covering is nearing the end

Curling or cracked shingles, heavy granule loss in the gutters, bare spots, and repeated leaks at different places all suggest the roof is near the end. For lifespans by material and the factors that move them, see how long a roof lasts in Georgia.