Punctures: The Most Common TPO Failure — Budget Planning
What moves the number on a TPO roof in Fryman Canyon, and why two bids differ by thousands.
Price is the first thing anybody wants and the last thing most contractors will commit to. The working figure for a TPO roof in Fryman Canyon is $7.50 to $12.00 a square foot installed over a prepared deck, and the rest of this explains what moves it, because the same roof can differ by half again depending on things you can check yourself before anyone quotes.
What you are actually paying for
Membrane thickness, insulation build-up and the number of penetrations to detail around set the price. Sixty mil rather than forty-five is a small percentage on the quote and a large difference in puncture resistance.
Where quotes diverge
Deck repair should be priced per sheet in writing before work starts, because it is the one item nobody can size until the covering comes off. Weld testing is the item to insist on. A probe run along every seam while the crew is still on site costs nothing and finds the cold welds that would otherwise be discovered by a tenant in December. It is also the line that most often separates two quotes that looked identical on page one.
How Fryman Canyon changes the figure
Big Tujunga Canyon funnels wind and, when it rains, water. The season's rain arrives in a handful of heavy events rather than steadily, so a gutter or a low-slope drain that has been dry since April has to cope with months of runoff in an afternoon, usually carrying grit off the slopes with it. Scattered older properties on difficult ground, often with additions and outbuildings that were never detailed as carefully as the main roof.
What we look at before quoting
- Seam integrity, probed along the full length rather than spot-checked
- Punctures and abrasion, especially on traffic routes to rooftop plant
- Membrane shrinkage and any resulting tension at the perimeter
- Flashing and termination bar at every wall, curb and upstand
- Drain sumps and clamping rings, checked and clear
- Fastener plates showing through the membrane surface
- Weathering and chalking of the surface, particularly on exposed elevations
Common questions
Can I get an accurate price without an inspection?
You can get a range. You cannot get a price, because nobody knows the deck condition until the covering comes off, which is why the per-sheet repair rate belongs in the estimate.
Is financing worth it on a roof?
It depends on the alternative. Deferring a failing roof through another wet season usually costs more in interior repairs than the finance charge would have.
The honest summary
TPO is a good system installed properly and an expensive mistake installed quickly. Seams and punctures decide its life, so protect the surface and test the welds. In Fryman Canyon the thing to watch is gutter and drain capacity, and every addition where it joins the main roof.
Free inspection, drone photography where access is difficult, and a written estimate with deck repair priced per sheet. No obligation.