Choosing the right materials and techniques for your roofing can significantly affect the roof’s structure, longevity, and ...

Flat roof replacements can cost anywhere from $3,000 to $20,000 depending on the roof’s size, type and materials. But most homeowners pay around $9,000 to replace a flat roof.

GRP and fiberglass flat roofing materials are slightly less expensive, each at $5 to $7 per square foot. FLAT ROOF MATERIAL COST, PER SQUARE FOOT ...