This roofing calculator will estimate approximate cost to install a new TPO flat roof system (50, 60 or 80-mil). The calculator 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). To estimate roofing cost, enter roof / building dimensions, choose tear-off options, new ISO insulation and roof curbs or penetrations (chimneys, skylights, roof hatch, parapet walls, etc).
How to estimate 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 price and roof size. It is important that you accurately measure your roof. Include any overhangs, bump-outs, and parapet walls.
Include all roof items into the calculator. Things like curb flashings (HVAC units, Chimneys, Skylights, Roof Hatches) or roof 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 roof tear-off. Most states require that your roof may not have more than TWO layers of roofing 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 roofing materials down to roof deck, before installing a new roof. This allows you to remove all wet insulation and repair a rotted / rusted roof decking.
It is important to understand that these are only approximate numbers, and your actual price will greatly depend on your geographic location, your roof complexity, the contractor you choose to install your roof, 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 roofing quotes from reputable, local roofing contractors who specialize in Flat Roofing, and have extensive experience with Thermoplastic Single Ply roofing systems, such as TPO and PVC heat-welded membrane roofs. 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?
In the US today, there is about 1,400 square miles of low-slope roofing in place ( an area larger than the state of Rhode Island) and almost 13 billion dollars is spent annually on reroofing, which makes disposal of the old membranes a big environmental issue. Among the three single-ply membranes, TPO just like PVC is 100% recyclable, while EPDM rubber is not.
In the last few years, many TPO manufacturers have started programs to educate both roofing contractors and building owners about the benefits and the process of TPO recycling. Recycling TPO not only saves our environment by reducing our carbon footprint, it also offers financial incentives. According to Carlisle, over a 12 month period, rooftop recycling diverts over 5,000,000 pounds of old membranes from being landfilled, and saved building owners tens of thousands of dollars in waste removal fees.
2013 just rolled around, and many business and homeowners who are looking to replace their old roofs will have to balance between a number of factors, such as cost, expected service life, durability, and energy-efficiency when comparing different roofing products. This dilemma remains particularly stark in the flat roofing market, where the competition between PVC and TPO roofing materials is going strong, with no clear winner in site. However, there are some important trends in the TPO roofing market that can help you figure out whether this is the right roofing material for you.
No Recent Updates or Revisions of ASTM Standards (very technical)
One of the major issues with TPO roofing membranes was premature aging and seam failures due to prolonged exposure to intense heat. TPO roofing failures were particularly frequent in the states that experience the most heat and UV radiation all year round. These failures sparked serious concerns from MRCA and NRCA / NRCC, both of which issued advisories back in 2010 and 2011 urging roofing contractors to be aware of these issues and take extra precaution when installing TPO membranes. Moreover, MRCA called a panel of TPO manufacturers to take a closer look and discuss these issues. Since TPO was documented to be experiencing major issues, it would be expected that both organizations would continue to periodically issue updates for roofing contractors. However there have been no updates since the dates of the initial advisories and discussions (about 2 years).
In the single ply roofing market in the US today the race is on between PVC and TPO thermoplastic roofing membranes. While PVC still has the upper hand and accounts for a significant portion of all residential and commercial single ply membrane installations, TPO is steadily gaining a faithful following and its share in the market continues to grow every year. Out of the two membranes, TPO is the newcomer to the US market, it was initially manufactured and installed in the European roofing market and only made its way into the US in the early 1990′s. By comparison, PVC has been on the US roofing market since the early 1970′s, and over time has earned a reputation as a high quality durable, and long lasting single ply roofing membrane.
Upon entry into the US market, TPO quickly grew in popularity, as it offered all of the advantages of PVC and then some, as well as an economical price that was hard to beat. The only problem with TPO is that despite its marketed advantages, the product actually has a history of very poor performance in the field, membrane deterioration and failures, as well as recalls by numerous manufacturers. The past 10 years have been one long experiment for TPO manufacturers in the US, who are still working on producing a final chemical formulation for TPO that would have all the benefits of PVC, but with a cheaper price tag attached. So far it has been a difficult balance to maintain. Currently, there is no definitive data on TPO membranes that can offer clear evidence about the membrane’s long term durability and performance.
In the single ply roofing market, TPO roofing membranes are continuing to experience significant growth, competing for a share of the pie with both PVC and EPDM membranes. While TPO is newest of all three membranes, officially introduced into the US market in the early 1990′s, its manufacturers have been working hard on developing a formula that would offer a competitive advantage in terms of longevity, durability and price over PVC roofing membranes. It took more than a decade and a challenging process of coming out with 36 different ASTM drafts of an industry standard for TPO before finally in 2003 an ASTM Standard 6878 was approved. The ASTM standard went through two more revisions in 2006 and 2008.
However, as recent as 2010, some questions still remained as to the longevity and durability of TPO membranes especially under conditions of heat and solar overload. These concerns were first raised by the Midwest Roofing Contractors Associations Inc in their TPO advisory to the contractors in February 2010. This advisory drew a lot of attention and raised a lot of questions for professionals in the industry. Subsequently, MRCA’s advisory was addressed by both Firestone Building Products (TPO membrane manufacturer) and by a panel on “TPO’s Long Term Performance” during MRCA’s 61st Annual Conference, held in October 2010. Since this is the most recent update available on the state of TPO roofing membranes, it is important for roofing contractors and consumers who are considering installing a TPO membrane to be aware of this information, as this can have a significant impact on the decision whether or not to choose a TPO membrane for their roof.