The answer to 'how long does shingle replacement last' is that asphalt shingle roofs typically last 15-30 years, depending on the quality of the shingles and the climate conditions. High-quality shingles in mild climates can last up to 30 years, while lower-quality shingles or those exposed to harsh weather may only last 15-20 years.
Factors that affect the lifespan of shingles include the material, installation quality, sun exposure, weather conditions, and proper maintenance. Homeowners should inspect their roof regularly and consider replacing shingles when they show signs of significant wear, such as curling, cracking, or loss of granules.