TPO Roofing Price Calculator

This roofing calculator will estimate the approximate cost to install a new TPO roof system (50, 60 or 80-mil). The tool also provides an option to estimate the cost of installing competing single-ply flat roofing materials (PVC and EPDM rubber roofing), as well as Tar & Gravel and Built-up Roofing (Rolled Asphalt / Modified Bitumen).

Roof Size
x ft.
Roof Drains
ln. ft.
Roof Slope
Low End
Mid Range
Estimated Roof Price: $0
High End

See costs in your area Start Here - Enter Your Zip Code

To estimate roofing cost, enter roof / building dimensions, choose tear-off options, new ISO insulation and the number of roof curbs or penetrations (chimneys, skylights, roof hatch, parapet walls, etc).

How to Estimate Your Roof Cost Accurately

  • This calculator is only as accurate as the numbers you plug into it. If your measurements are off, so will be the estimated roof size and price. It is important that you accurately measure your roof. Include any overhangs, bump-outs, and parapet walls.
  • Include all parts of the roof into the calculator. Things like curb flashings (HVAC units, Chimneys, Skylights, Roof Hatches) or drains may seem of little importance to you, but they take considerable amount of time to flash properly and slow down the process.
  • Don't forget tear-off. Most states require that your roof may not have more than TWO layers of materials (without special approval by building engineer or architect and permission from your City/Town building department). It is also recommended to remove all existing materials down to the roof deck, before installing a new roof. This allows you to remove all wet insulation and repair a rotted / rusted roof decking.
Commercial TPO Roof InstallationCalculator limitations: It is important to understand that these are only approximate figures. Your actual price will greatly depend on your geographic location, roof complexity, the contractor you choose, and ever fluctuating cost of materials.

We provide this calculator for reference ONLY propose, and it is not a solicitation or offer to install any roofing products.

We recommend that you get at least 3 quotes from reputable, local contractors who specialize in Flat Roofing, and have extensive experience with Thermoplastic Single Ply systems, such as TPO and PVC heat-welded membranes.

Always hire a contractor that has General Liability, Workers Comp and optionally Bond / Excess insurance. Also, ask for at least 3-5 references of jobs that are OVER 5 years old.

Read more about TPO Roofing Installation.

Related article: Which is better - TPO or EPDM Rubber roof?

26 thoughts on “TPO Roofing Price Calculator

  1. Margaret Gentry

    Roof is in emergency condition in Titusville. No insurance status so no delay for work to begin. Received a $14k quote for 1173 sf flat roof 1950s ranch. HELP!

    1. TPO Roofer Post author

      Hi Margaret,

      I’d say $14K is a bit expensive for 1173 s.f. … but that could be home size, and roof is probably bigger, with overhangs and what-not …

      What the exact roof size?
      What material was quoted?
      What insulation was quoted?
      Does quote include tear-off?
      Did you get additional quotes?

      I recommend you know answers to the above questions, so you can compare quotes. Get additional quotes.

      Please elaborate on what kind of “HELP” you are looking for.

      Good luck, Leo

  2. barbie

    I just had TPO installed on an addition and the contractor screwed the TPO into the guttering. They actually screwed through the guttering and the wood the guttering is screwed to. Is this the correct procedure? Seems crazy. Please advise!

    Thank you

    1. TPO Roofer Post author


      Well … this is not entirely correct, but also not completely wrong. Let me explain.

      You want the roof to overhang the gutter, so that water from the roof would not go behind gutters.

      Now what your contract did is wrong method. They should have used metal drip edge, that overhangs the gutter. Why they did not do it? Most likely because they were lazy, and it costs a pretty penny to have drip edge installed (vs aluminum termination bar) … We are talking about $4.5 per foot extra cost to the contractor. However, when you have 30-50 feet of roof edge, that is merely $150-250, and contractor should have priced that into the job.

      Now I don’t know if you discussed roof edge, and it was your idea to have termination bar vs drip edge. If so, then I think contractor did the right thing.

      If they installed screws above gutter, water would be “leaking” from behind the gutter, and you’d not like that.

      Hope this helps. Leo

  3. Diann Vicario

    I live in a mobile home. It started out as a single and one of the former owners had an addition put on. I have no idea what shape the roof is in. However, the leaks that we have appear to be coming from the area where the addition connects with the original home. It is also a very old home and we cannot afford to buy a new home. Thank you!!

    1. TPO Roofer Post author


      Is there a question? I will assume that you need a solution. Cheapest option is to have a 3-4 foot wide strip of TPO / PVC or Rubber roof installed between addition and original roof. Tuck the strip under original roof and overlap the addition roof. I assume original roof is ABOVE or higher than addition. If not, reverse the order.

      Otherwise, you may want to consider replacing the whole roof. This will be costly however.

      Good luck.

  4. Joseph manion

    Can we install solalr racking for solar panels on top of the TPO we will not penetrate the roof we use cinder blocks to hold the racking down

    1. Leo - Roofer


      You should be able to instal solar with ballasted racking on TPO roof, without any problems. What I would recommend to prevent any possible leak issues, is to use some sore of separation mat… even a strip of TPO material, where racking is in contact with roof.

      And of course, take into account combined weight of ballasted solar + snow load, to make sure your roof does not collapse if too much snow falls on it.

      Good luck

      1. Jim Kirby

        The separation mat acts as a sacrificial layer when the PV system moves around. The key to the sacrificial layer is to have it adhered to the TPO, not to the bottom of the PV racking system. If the separation sheet is attached to the bottom of the rack, it moves when the rack moves and causes damage to the TPO membrane.

  5. Jose

    Your calculator would be much more helpful if the calculation included a ZIPCODE FIELD to immediately reflect LOCAL labor cost estimates (without waiting for local roofers to calculate the cost themselves and email it to me), since this will vary a TON depending on what state/ where a roofer is working. For example, your estimator estimates straight labor cost of installation of new TPO on simple roof with no penetrations etc at $640 per square. I think that is a national estimate, since its around $300 per square a crew gets per square for TPO here in Tennessee.

    1. Leo - Roofer


      When materials cost $170-200+ per square (membrane, drip edge, insulation, screws + plates, glue, patches, etc) – a “normal” roofing company CANNOT install it $300 and not lose money on the job.

      Also consider that most existing roofs should be stripped off, and old roofing must be disposed of.

      So you $300 figure is completely unrealistic.

      We did not put Zip Code field, because it is a usability issue – that’s why we have Region option – to account for different local markets.

    1. TPO Roofer Post author

      Yes it does – full installed cost. But obviously this is only an estimate, and actual prices will depend on the roof and location, and contractor, and materials used in the job, and many other factors.

      Still, these are pretty close estimates!

    1. TPO Roofer Post author

      Brian, not to be rude or anything, but if you don’t know anything about TPO, maybe you should not be selling it. It is a fairly complex system and small mistakes can cost big bucks.

      I recommend you start by reading about particular products on manufacturers websites.

      Best of luck selling it, and don’t take personal offense please.

  6. Gemma Buttrum

    All licensed Roofers must carry insurance and be bonded for the safeguard of their clients. Be sure to authenticate this when using the Roofers you finally choose but don’t stop there. Get information about the limits of the protection and which company they are really insured with. Also get information about warranties.;

  7. Windows on Washington

    As a means to give the customer some familiarity with ranges, it seems like an effective tool.

    Granted, every project is different and needs to be examined on a case by case basis, but I think this will help clients get a very good idea of what they need to be thinking in terms of.

    I think it is a very nice interface and is pretty slick set up. 

    Great job!!

    Windows on Washington

  8. TPO Roofing

    Thanks for the TPO roofing calculator. Very helpful tool. Been looking for something like this for awhile!

    1. joseph pallivathucal

      I need 41000 sq ultraply tpo with 30 year warenty and like to know how much will cost for the product including the shiping to california

      1. Leo - Roofer


        I don’t think you will get a 30 year warranty anywhere. The max in commercial roofing is 25 years, and only on thickest membrane (typically 80+ mil), which is the most expensive option.

        1. David Bloomer

          Actually there are several manufacturers that will offer a 30 year NDL. You can get a 30 year warranty as long as certain conditions are met, such as installation needs to be done by a certified roofing contractor, also for a 30 year NDL warranty (No Dollar limit) it must be a commercial building. You will also be required to use 80 mil TPO, along with other detail requirements.


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