Expert flat roof replacement and repair using TPO, EPDM, and modified bitumen systems. Residential additions, garages, commercial buildings, and low-slope roofs throughout Nassau and Suffolk County.
Flat and low-slope roofs are common on Long Island homes — found on additions, attached garages, porches, dormers, and commercial buildings. When a flat roof fails, it fails completely: pooling water, membrane blistering, and seam failures quickly lead to leaks and extensive interior damage if not addressed.
Greene Group Construction installs all major flat roofing systems used on Long Island: TPO (thermoplastic polyolefin), EPDM (rubber roofing), and modified bitumen. We remove all existing roofing material, inspect and repair the roof deck, install proper tapered insulation for drainage where needed, and apply the new membrane system with heat-welded or adhesive seams.
We recommend TPO for most Long Island flat roof applications due to its superior heat-reflective properties, energy efficiency, long lifespan, and strong resistance to UV exposure, punctures, and chemical exposure. EPDM remains an excellent, cost-effective choice for smaller applications, and modified bitumen is well-suited for certain commercial applications.
White TPO membrane reflects up to 85% of solar radiation, significantly reducing cooling costs during Long Island summers — especially for additions and commercial rooftops with HVAC equipment.
We install all three major flat roof systems — here's how they compare for Long Island homes
Our recommended system for most Long Island applications. Energy-efficient white membrane with strong seams and excellent resistance to UV, chemicals, and punctures.
Time-tested black rubber membrane. Cost-effective and durable, ideal for smaller flat roof sections, garages, and residential additions.
Multi-layer asphalt-based system with excellent durability. Common on commercial buildings and roofs with foot traffic from rooftop HVAC systems.
Serving all of Nassau and Suffolk County — call for a free flat roof inspection