Choosing the right TPO for your building

By The Coffee Shops®.

Understanding the differences in cost, durability and service life can help business owners make a smarter roofing investment.

For business owners replacing a commercial flat roof, TPO is a reflective roofing option that performs well in cold climates. According to an article by Four Seasons Kanga Roof, one of the biggest decisions is whether to choose a 45-mil or 60-mil membrane.

A mil equals one-thousandth of an inch. Although both options have the same basic three-layer construction, a 60-mil membrane contains more material to withstand weather exposure, rooftop traffic and punctures.

When 45-mil TPO makes sense

A 45-mil TPO roof offers the lowest upfront cost and an estimated service life of 12 to 15 years when properly installed. It also provides solar reflectivity and better puncture resistance than traditional EPDM.

This option may fit temporary structures, cold-storage facilities and buildings with limited rooftop traffic. Its trade-offs include a shorter anticipated service life, shorter warranty periods and less resistance to tears and punctures than 60-mil TPO.

Why consider 60-mil TPO

A 60-mil membrane offers greater durability, stronger puncture resistance and an estimated service life of 20 to 25 years. It may also qualify for longer full-system manufacturer warranties.

The thicker membrane is particularly valuable on buildings with rooftop HVAC equipment that requires regular maintenance. Although it costs more initially, the upgrade may add as little as 4% to the total installed cost.

Making the decision

Choose 45-mil TPO when minimizing upfront cost is the priority, and rooftop activity is limited. Consider 60-mil TPO when you want a longer service life, stronger damage resistance and better protection against regular foot traffic.

Whichever thickness you select, proper installation is essential. Work with a certified TPO installer who has documented training from manufacturers such as Elevate, Carlisle SynTec or GAF.

Read the full article to learn more about choosing the right TPO for your building.