What is a TPO roof and is it good for a flat roof?
TPO stands for thermoplastic polyolefin, which is a mouthful for what is really just a tough, flexible plastic sheet made to cover flat and low-slope roofs. Roofing 101 installs TPO on homes with flat sections, additions, patio covers, and on small commercial buildings all over central Oklahoma. If your roof does not have enough pitch for shingles or metal to shed water properly, a membrane like TPO is usually the answer.
Here is how it works. TPO comes in wide rolls of white membrane that get rolled out over the roof deck, usually over a layer of insulation board. The seams where the sheets overlap are heat-welded together with a hot-air gun, which fuses them into one continuous surface. Done right, those welded seams are as strong as the membrane itself, and that is the whole point of a flat roof: give the water nowhere to sneak in, because on a flat roof it is going to sit there instead of running off.
Installed, TPO typically runs about $7 to $13 per square foot depending on the thickness of the membrane, the insulation, and how much detail work your roof has around vents, drains, and walls. That makes it a mid-range option, more than a basic shingle but a fair price for a surface that is built to pond water and take Oklahoma sun.
The big advantage of TPO in our climate is that white membrane reflects heat instead of soaking it up. On a flat roof baking under an Oklahoma July sun, a reflective surface can meaningfully cut how hot the space underneath gets, which your air conditioner will appreciate. TPO also handles ponding water and resists tears and punctures better than some older flat-roof systems, and it does not use the messy hot tar that built-up roofs are known for.
TPO is not the answer for every roof. If you have plenty of slope, shingles or standing-seam metal will usually serve you better and last longer. And a membrane roof is only as good as the flashing and welds at every edge and penetration, which is exactly where a rushed installer creates leaks. Matt has spent 35 years learning where flat roofs fail, and he welds and flashes them so they do not come back on him.
If you have a flat or low-slope section giving you trouble, call Matt at 405-646-0053 to find out whether TPO is the right fit and to get transparent pricing before any work begins.
Related roofing services
Still have a question about your roof?
Talk to Matt directly — the owner, not a salesperson. Honest answers, no pressure, no callbacks.