Q&A – TPO, PVC or Torchdown?

After multiple leaks on a low-slope section of his roof, Joseph asks advice about which roofing system is his best option moving forward. 

Homeowner Joseph Manu from Washington asked: 

“We have a situation where our builder installed shingles (IKO Cambridge) on a very low slope section of our roof (1/12 pitch) and we had multiple roof leaks as a result. Finally, after repeated complaints the builder has agreed to fix it by changing shingles to a torchdown product. They are suggesting specifically CertainTeed Flintlastic SA. We consulted another roofer who suggested using TPO/PVC over torchdown. Does anyone have experience with installing torchdown for low slope roof areas? We are concerned about the life of the product. Any feedback about that specific torchdown product? Would you recommend PVC/TPO over torchdown? Also, any issues with having two different products in different sections of the roof?” 

Our resident expert roofer, John Stout with Go Roof Tune Up™, had this to say in response: 

“Sorry to hear of your leak problems. It appears that you are well on your way to solving the problem. CertainTeed FlintLastic SA has a very good reputation. TPO, PVC and Modified Bitumen are all good roofing systems, if properly installed. The “SA” in CertainTeed refers to the application of the product, the product is self-adhered not heat applied or torched down. 

It is important to have the existing shingle roof removed (from the flat section) and an approved roof installed. I’m sure that the system will give you good service for the life of your shingle roof. It is important to have your roof cleaned of trash and debris and minor maintenance taken care of by your local roofing contractor.”  

Have a question? AskARoofer. 

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About Go Roof Tune Up 

Go Roof Tune Up™ is comprised of certified roofing professionals and expert craftsmen with a senior management team of a combined 140 years of roofing experience. With this experience and continuing education for all team members we are convinced that roof maintenance is the best way to ensure the longevity of a roof and that by far most roofs can be repaired rather than replaced. Go Roof Tune Up™ is the premier provider of roofing services including repair, maintenance and replacement. We currently offer services in a number of States and the list is growing regularly. We work with homeowners, real estate professionals, property managers and home investors. Because of our extensive roof repair experience, Go Roof Tune Up™ can confidently offer you an exclusive 5 years no Leaks Limited Warranty- on your ENTIRE ROOF!