Low-slope (flat) TPO roofing system installed right over wood ceiling boards – project 15031302

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We’ve replaced a relatively new roof. Previous roofs here were constantly purely designed and purely installed.

As a result this house did experience various leaking issues over the years, which were not actually resolved with another and another new roof.

We’ve replaced it with GAF EverGuard® TPO 60 mil installed as a fully adhered system, along with total of 7" thick ISO insulation to exceed at that time required R-38 insulation R-Value and with other components and installation details assuring dependency on this roof for long years.

In the process we have also replaced lots of damaged 2x6 tongue and groove (T&G) wood ceiling/roof deck boards.

Existing gutters and downspouts were also replaced with new aluminum seamless gutters and with larger downspouts.

Final TPO weld at finally fixed stubborn leaking area

Replacing damaged 2x6 T&G deck boards with new ones

TPO membrane welding robot in action

Mechanical attachment of TPO membrane at roof connection with wall

Robot welding of TPO flashing to the main roof membrane at roof-to-wall connection

4 Responses

  1. kswistun
    Good question: (1) Yes, avoid installing TPO membrane right over the plywood. However if for any reason you need to do so, make sure all plywood fasteners are screws vs. nails. Some nails may pop out and puncture the TPO membrane. (2) In this case, I am referring to "TPO roofing system", not to TPO membrane only. "TPO roofing system" on this roof includes 7" thick (in total) ISO insulation.
    April 4, 2021
  2. Ivan Ilin
    If the TPO installer did not install any insulation layer under the membrane, is it an acceptable practice? They just glued the membrane straight away on top of the plywood flat roof surface.
    April 2, 2021
  3. insulation for attic ceiling
    The tranquility you may experience over here is unmatched for when you compare it with the hustle and busy life of the suburbs in Mumbai. Magnetic generator electrical power is also becoming more popular as it possesses the advantage of being in position to turn out electrical power continuously under any weather. It's simple steps like this that can add up and make a great difference over time.
    June 7, 2018
  4. insulationreviewed
    Thanks for the awesome content. I have shared it on my social media accounts.
    May 29, 2018

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