The answer to 'how often to replace shingle replacement' is that most asphalt shingle roofs need to be replaced every 15-25 years, depending on the climate and weather conditions in your area. Factors like sun exposure, wind, and hail can impact the lifespan of your roof. Regular inspections and maintenance can help extend the life of your shingles, but eventually they will need to be fully replaced.
Shingles can start to show signs of wear like curling, cracking, or missing granules over time. If 30% or more of your shingles are damaged, it's usually time for a full roof replacement. Waiting too long can lead to leaks and more expensive repairs, so it's best to replace your roof before major problems occur.