The most common roof covering used on U.S. households, asphalt shingles are designed as multilayered, water shedding ‘mats’ that rely on the slope of a roof deck to effectively shed water.
Shingles are layered and affixed to an underlayment barrier which protects the actual roof (plywood, OSB, or wood boards), from water and other elements. A properly installed shingle roof deters water from migrating under the shingles and causing leaks.
Shingle roofs typically last 25-30 years, but can last longer depending on the quality of materials used.
The most common causes of wear include wind, rain, sun exposure and temperature changes. Over time, the shingle granule coating begins to wear off, and the shingle itself can become brittle and crack.
If your shingles are showing signs of cracking or curling up, it’s a good indicator that it might be time for a roof replacement.