Flat and low-slope roofs are everywhere on the Charleston peninsula, on piazzas, rear additions, porches and commercial buildings. They need membrane systems designed to handle standing water, not shingles. We replace them with TPO, modified bitumen or restoration coatings depending on the building.
This service is part of our roof replacement services in Charleston. Homeowners who need it often ask about FORTIFIED hurricane roof upgrades, 2026 roof replacement cost ranges or a complete new roof installation at the same time, so we price and plan them together.
Systems we install
- TPO: white, heat-welded seams, reflective and cost-effective
- Modified bitumen: multi-ply, tough and well suited to small residential low-slope roofs and porches
- EPDM: rubber membrane for specific applications
- Silicone or acrylic restoration coatings when the existing roof is sound
Fixing ponding and drainage
Water that sits for days after a storm shortens a flat roof's life. During replacement we can add tapered insulation, crickets and new scuppers or drains to move water off the roof.
Piazzas and tie-ins
On Charleston single houses, the low-slope piazza roof meets the main roof and the wall in places that leak if they aren't flashed carefully. We pay special attention to those joints.
Areas we serve
Flat Roof Replacement is available for homes in Downtown Charleston, West Ashley, James Island, Mount Pleasant, North Charleston, Daniel Island, Johns Island, Folly Beach, Sullivan's Island, Isle of Palms and Hanahan.
Frequently asked questions
How long does a flat roof last?
Typically 15 to 25 years for TPO and modified bitumen, depending on installation quality, drainage and maintenance.
What does flat roof replacement cost?
Most residential low-slope roofs run about $8 to $13 per square foot, depending on insulation, drainage changes and access.
Do you do commercial flat roofs?
Yes, small to mid-size commercial and mixed-use buildings in the Charleston area.
Related roof replacement services
All roof replacement servicesNew Roof InstallationShingle Roof ReplacementMetal Roof ReplacementFORTIFIED & Hurricane-Rated RoofsRoof Replacement Cost