
Flat Roof Systems Experts

Low-slope and flat roofs require a completely different engineering approach than pitched roofs. At Harborline Roofing & Exteriors, we specialize in high-performance membranes like EPDM (rubber) and TPO (thermoplastic). These systems are designed to create a continuous, waterproof skin over your structure. Whether it’s a modern residential addition in Westport or a commercial storefront in Stamford, we provide the specialized welding and sealing required for flat surfaces.



Replacement or major repair is necessary when you notice "ponding" water that remains 48 hours after rain, or if you see blisters and cracks in the existing membrane. Flat roofs are common on garages, balconies, and commercial extensions, but they are prone to failure if the drainage isn't perfect. If your current flat roof is more than 15 years old or showing signs of internal ceiling leaks, a professional assessment of the substrate is critical.

What’s required for a flat roof is an obsessive focus on seams and flashing. We start by ensuring the roof deck has the proper "pitch" for drainage, often installing tapered insulation to move water toward scuppers or drains. We then heat-weld or chemically bond the membrane sheets to create a monolithic barrier. Harborline Roofing & Exteriors pays extra attention to "terminations"—the points where the roof meets the walls—to ensure zero water penetration.


Start by completing the 'Get a Free Quote' form on our website to share your Flat Roof Systems needs with us.

Next, we'll arrange a property visit at a time that works for you to provide an in-person estimate for your Flat Roof Systems needs.

After you approve our estimate, we'll schedule a date to complete the job. Our team will work hard to exceed your expectations!
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