TPO roof repair
TPO (thermoplastic polyolefin) is the white single-ply membrane on many warehouses, big box stores and offices built in the last 25 years. Its seams are heat-welded with hot air, so most repairs are a cleaned, prepared area and a welded TPO patch. Most TPO repair visits fall in the $300 to $1,100 range; a replacement TPO roof runs $4 to $14 per sq ft, and the system typically lasts 20 to 30 years.
Typical TPO repair
$300 to $1,100
Replacement $4 to $14 per sq ft.
Common TPO problems
- Seams that were under-welded at install and open with age and movement.
- Punctures from foot traffic, dropped tools and hail.
- Flashing failures at curbs, walls and pipe boots.
- Surface cracking and chalking on older or thinner membranes.
- Wrinkles where the sheet has pulled from the adhesive or between fasteners.
What TPO repairs typically cost
| Job | Typical price |
|---|---|
| Welded patch Clean, prepare, weld a TPO patch | $150 to $1,500 |
| Seam repair Re-weld, re-tape or strip-in an opened lap | $200 to $1,000 |
| Flashing repair Curbs, walls, pipe boots and pitch pans | $200 to $750 |
| Membrane section Cut out and replace a damaged area | $250 to $1,750 |
| New TPO roof Installed | $4 to $14 per sq ft |
Typical US prices from published national roofing cost guides, January 2026 editions, read November 2026. Installed, in US dollars, before any local tax. A guide, not a quote.
What a sound TPO repair includes
A dry, clean, primed surface
Patches and seams only hold on clean, dry membrane. A roofer who patches over standing water or dirt is selling a callback.
The cause, not just the drip
Water travels under membrane and along deck flutes, so the wet ceiling tile is rarely under the hole. A good repair names where the water got in.
Cleaned and welded, not glued
Old TPO gets dirty and oxidized; it needs cleaning with a membrane cleaner before a hot-air weld will bond. A probe check of every new weld shows it took.
Wet insulation found and dealt with
Wet board loses most of its insulating value and holds water against the deck. Cores or a moisture survey show how far it has spread; badly wet areas are cut out and replaced.
Photos before and after
Dated photos of every repair, and its location on a roof plan, protect your warranty and any insurance claim, and help the next roofer.
Safe access and fall protection
Work near an unprotected edge on a low-slope roof calls for fall protection under OSHA 1926.501: guardrails, safety nets, personal fall arrest or the combinations the rule allows. Ask how the crew will get up and stay safe.
TPO roof leaking? Send us the building ZIP and we will find a roofer working in that area.
Ask for a free quoteHow a TPO repair usually goes
Find the entry point
The roofer walks the roof, checks the areas above the leak and upslope of it, and may use a moisture meter, infrared scan or cores.
Make it watertight
If water is coming in, a temporary repair first: a compatible patch, sealant or tarp held down so wind cannot lift it.
Permanent repair
The proper detail for the system: a heat-welded patch, taped seam, re-set flashing or a section of new membrane.
Report and photos
Before and after photos, what was found and what to budget for next, so you can decide between repair and replacement with facts.
Questions people ask
Can a TPO roof be repaired?
Yes. Most TPO repairs are a heat-welded patch over a cleaned area. Very old, brittle TPO can be hard to weld, which is a sign the roof is near its end.
How long does a TPO roof last?
Typically 20 to 30 years, depending on membrane thickness, installation quality, climate and maintenance.
Can you patch TPO with EPDM tape or roof cement?
Not if you want it to last. TPO bonds to TPO by welding. Tapes and sealants made for TPO exist for temporary repairs, but the permanent repair is welded.
Can you paint a TPO roof?
Coatings made for single-ply roofs can be applied to a sound TPO roof, usually with a primer. Check that a coating does not void the membrane warranty first.
What does a TPO roof repair cost?
Most visits cost $300 to $1,100. Seam repairs run about $200 to $1,000 and flashing repairs $200 to $750.
Get the TPO roof repaired
The building ZIP, where to reach you, then a few taps about the roof. About a minute.
This is a free matching service, not a commercial roofer. We look for one who works in your area and tell you their name before anything is shared. Nobody contacts you until you say yes.
Thanks, your enquiry is in.
- We look for a commercial roofer who covers your building and does this kind of work, then email or call to tell you who it is.
- Your details reach that firm only if you say yes.
- They inspect the roof and give you a written price. No marketing from us, ever.