The answer to 'what causes roof replacement' is that there are several common reasons a roof may need to be replaced, including age, damage, and deterioration. Older roofs that have reached the end of their lifespan, usually 20-30 years, often need to be replaced due to normal wear and tear. Severe weather events like hail, heavy snow, or high winds can also cause significant damage that requires a full roof replacement. Additionally, leaks, missing or cracked shingles, and extensive rot or mold growth are all signs that a roof is failing and needs to be replaced.
Roof replacement is a major home improvement project, so it's important for homeowners to work with a qualified roofing contractor to assess the condition of their roof and determine the best course of action. A professional roofer can provide an expert evaluation and recommend whether repairs or a full replacement is needed.