TPO Roofing

TPO, short for thermoplastic polyolefin, is a single-ply membrane rolled out in wide sheets and heat-welded together at the seams rather than glued or taped. That heat-welding is a big part of what makes a properly installed TPO roof reliable — a fused seam behaves more like one continuous sheet than a series of joints, which matters over years of thermal expansion and contraction.

TPO is typically a reflective white or light-colored membrane, which keeps roof surface temperatures lower under Houston's long, intense summer sun compared to darker roofing materials. Lower surface temperatures translate into less thermal stress on the membrane itself and, often, a meaningful reduction in cooling load for the building underneath. It's a practical fit for a climate that spends much of the year working against a building's cooling system rather than its heating system.

A TPO installation starts with the existing roof condition and insulation layer, since a compromised deck or wet insulation underneath a new membrane defeats the purpose of replacing it. The membrane is then rolled out, seamed with heat-welding equipment, and flashed carefully at every parapet, curb, drain and piece of rooftop equipment — the same principle as flashing on a shingle roof, just executed with membrane detailing instead of metal and shingles.

Seam separation is the most frequent issue, usually from a seam that wasn't fully fused during installation or that's been stressed by movement over time. Punctures from foot traffic or dropped tools during other rooftop work are common on buildings with a lot of equipment. Flashing failures around HVAC curbs, vents and parapets show up just as often on a TPO roof as they do on a shingle roof, for the same underlying reason — penetrations are always the weak point.

Scheduled inspections catch seam and flashing issues before they become an active leak, which is especially valuable on a low-slope roof where interior water damage often shows up before any visible sign on the roof itself. See Commercial Roof Repair for how we scope targeted repairs, and Commercial Roofing Resources for maintenance program details.