TPO, EPDM, and Flat Roofing Solutions

Flat and low-slope roofs are standard on commercial buildings, multi-family properties, and many residential additions throughout Pennsylvania, New Jersey, and Delaware. These roof types require specialized membrane systems that traditional shingles cannot provide. Greenawalt Roofing installs, repairs, and replaces TPO, EPDM, and modified bitumen flat roofing systems engineered for decades of leak-free performance.

TPO (Thermoplastic Polyolefin) Roofing

TPO has become the most widely installed commercial roofing membrane in the United States, valued for its heat-welded seams, energy efficiency, and competitive cost. TPO membranes are available in white, gray, and tan, with the white option delivering significant cooling cost savings by reflecting up to 90% of solar energy. Heat-welded seams create a monolithic bond that is stronger than the membrane itself, virtually eliminating seam failures that plague mechanically fastened and adhesive-bonded systems.

Greenawalt Roofing installs fully adhered and mechanically attached TPO systems from manufacturers including Carlisle SynTec, GAF, and Firestone. System selection depends on your building’s structure, insulation requirements, and local wind uplift ratings — our team evaluates each project individually to recommend the right approach.

EPDM (Rubber) Roofing

EPDM rubber roofing has a 60-year track record as one of the most reliable flat roofing membranes available. Its flexibility allows it to handle building movement and temperature extremes without cracking or splitting — a critical advantage in the mid-Atlantic climate where rooftop temperatures can swing more than 150 degrees between summer and winter. EPDM is available in 45-mil and 60-mil thicknesses, with the heavier gauge recommended for most commercial and multi-family applications.

Modified Bitumen Roofing

Modified bitumen systems combine the proven waterproofing properties of built-up roofing with modern polymer-modified membranes that add flexibility and UV resistance. These multi-layer systems are particularly well-suited for roofs that experience foot traffic — mechanical equipment areas, rooftop decks, and building access points. Torch-applied, cold-adhesive, and self-adhered options give us flexibility to match the installation method to your building’s requirements and conditions.

Flat Roof Maintenance and Repair

Flat roofing systems require regular inspection and maintenance to deliver their full service life. Standing water, membrane punctures, flashing separation, and drain blockages are the most common issues we address. Our maintenance programs include biannual inspections, drain clearing, seam testing, and prompt repair of any deficiencies found — preventing small issues from becoming expensive emergency repairs.

Whether you need a new flat roof installation for a commercial building, a membrane replacement on an aging warehouse, or a repair on a residential addition, Greenawalt Roofing’s flat roofing specialists deliver systems built to perform.