The lifespan of your roof is only as good as the workmanship and quality of materials utilized. The climate in your particular location will also be a factor. Depending on your roofing system, a roof with Coastal Windows & Exteriors can last a lifetime. But if you have inferior shingles, poor or non-existing underlayment, your roof may only last 5 years. Cheap roofing materials or improper installation will shorten the lifespan of any roof.