![]() ![]() ![]() Also, be sure to choose a UV-resistant material so it doesn't degrade with continued exposure to sunlight. Seamless models are better than seamed ones, as the seams are weak points that can leak. These roofs are the most popular flat roof option and can last 40 years or more. ![]() A roof installer heats and stretches PVC, plastic, rubber, or EPDM to fit across your roof and adheres it to your home with a solvent or bitumen or melts it to the roof structure to keep it in place. Single-ply membrane cost around $5.50 per square foot, or between $4 and $7 per square foot, installed. However, it requires multiple layers to be truly waterproof, which increases cost, and each layer has to be applied quickly in its liquid form, SPF has a short pot life. It's a liquid product that expands into a dense, waterproof foam and is a popular choice because of its longevity, energy efficiency, and easy maintenance. Polyurethane roofing, also known as SPF, can last for up to 50 years if properly maintained. ![]() Most people pay around $5.50 per square foot, installed, for polyurethane roofing, or between $4 and $7 per square foot, with an average price of $550 per square. However, fiberglass roofs aren't recommended for large structures, as they're prone to ponding across large areas, which puts strain on the roof and risks cracking and leaking. A fiberglass flat roof is usually double-layered to add strength and durability, and they have a lifespan of 20 years or more.Īlthough a budget-friendly material, fiberglass is lightweight and fire- and weather-resistant. You'll pay between $4 and $6 per square foot. Resource Centerįiberglass, or GRP, flat roofs cost an average of $5 per square foot, or $500 per square. Find hiring guides, material costs, expert advice, how-to's and more. ![]()
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