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A Brief Guide on Maintaining and Cleaning TPO Roofs

March 24, 2022

Maintaining and Cleaning TPO Roofs in Dallas

TPO provides businesses with several benefits for a low price, making it an incredibly cost-effective choice for commercial roofing. However, your investment can become an expensive repair as you find yourself with leaks and mold due to poor TPO roof maintenance.

Learn how to keep your TPO roof in good condition by reading our guide.

What Is TPO?

TPO (Thermoplastic Polyolefin) is a rubber roofing material primarily made from recycled rubber. It’s best used on flat roofs that have a low pitch.

TPO is eco-friendly, lightweight, tear-resistant, has a reflective surface that lowers energy costs, and requires minimal maintenance. It’s also extremely affordable, costing just $3.50 to $14.00 per square foot.

TPO Roofing Maintenance

Preventative maintenance is essential to maximize your TPO roof’s lifespan and performance. Keeping it clean allows the membrane to reflect as much sunlight as possible for as long as possible to keep your building cool.

Poor Drainage

Since TPO is typically installed on flat roofs, it faces the same drainage problem. Flat roofs don’t drain as well as pitched roofs. Water can pool on them, and the low pitch also makes it easier for dirt and debris to accumulate.

A flat roof can become a habitat for mold, mildew, algae, and plant growth if left alone. These can penetrate roofing material, cause rot, and compromise the roof’s structural integrity.

The debris can also become a food source and attract pests. It can become a serious health and property damage risk if it attracts birds to your property. 

Their droppings can carry a large number of disease-causing bacteria and fungi. They’re also highly acidic and can damage your TPO roof and other property features.

Regular Cleaning Schedules

Maintaining a regular cleaning schedule is key to preventing damage caused by debris and pests. Your TPO roof should be regularly washed and have any debris on it removed. This will keep the roof white and let it maintain its reflective and cooling properties.

You can also prevent debris from getting on the roof in the first place by trimming any long branches from nearby trees. Though TPO is resistant to tears and impacts, it is susceptible to penetrations. Trimming the branches will help keep them from falling onto and puncturing the membrane.

Gutters should also be kept clean to avoid clogs. This is important for countering the drainage problems that come with many flat roofs. Your roof flashing should be checked each time it’s cleaned and repaired when needed to prevent leaks.

How often your TPO roof needs maintenance depends on your area’s climate, precipitation levels, your roof’s pitch angle, and dust and wind conditions.

TPO Roof Cleaning Process

The steps in cleaning a TPO roof are as follows:

  1. Before cleaning a TPO roof, curbs, penetrations, and other areas where water could enter should be protected.
  2. Rinse the surface with a pressure washer of 2,000 PSI or under.
  3. Clean the roof in sections with a soft bristle push broom and a TPO-safe, non-abrasive roof cleaning solution. Push the dirt you washed off toward the drain.
  4. Rinse the cleaning solution off with the pressure washer.
  5. If the roof is still dirty, repeat steps 3-4 as needed.
  6. Inspect the TPO membrane for any damage. Check the seams and the transitions between the membrane and other roof parts.

Hire an Experienced Professional

It’s best to hire a professional for your TPO roof maintenance needs to prevent accidental damage. That’s why you need Watertight Roofing.

Our team has experience working on millions of square feet of roofing. We know the details that need attention and ensure your roof lasts for as long as possible with our TPO commercial roof maintenance service.

Schedule a free commercial roof assessment by filling out our contact form or by calling us at 888-809-9976.