The answer to 'how often to replace shingles' is that most asphalt shingle roofs need to be replaced every 15-25 years, depending on various factors. Asphalt shingles are a common and cost-effective roofing material, but they do have a finite lifespan. Factors like climate, roof slope, sun exposure, and proper installation can affect the longevity of shingles.
Most manufacturers recommend replacing asphalt shingle roofs every 15-20 years, though they can sometimes last 20-25 years with proper maintenance. Signs it's time to replace shingles include curling, cracking, loss of granules, and leaks. It's important to have a professional roofing contractor inspect your roof regularly to assess its condition and determine the best time for replacement.