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Flat Roofing

Flat roofs are most often used to maximize useable space, such as on row homes in cities like Washington DC. TPO, once welded together, creates a seamless watertight membrane which is especially important on a roof without no or low slope.

Common Questions

Finished TPO flat roof in Washington, DC.
Flat Roofing in Washington, DC. TPO Roofing DC.
Roofing in Washington, DC.
Details of TPO flat roofing installation.
Residential TPO flat roof in Washington, DC.
Finished photo of a TPO flat roof.

TPO Flat Roof Layers

Wood Deck

All roof layers are stripped to reveal the wood deck, which is thoroughly inspected and replaced.

Poly ISO Insulation

Polyisocyanurate insulation board goes down as a base layer. ISO board is a high density insulation board. Total R-Value is dependent on the amount of insulation installed. Learn more about insulation >

R-value Upgrade

R-value represents an insulation's effectiveness at resisting heat travel. Upgrades include more poly-ISO, staggered seams, and longer fasteners. We offer 5 options, from R6 up to R30.

Fasteners

Fasteners securely hold down the poly-ISO, protecting against wind uplift.

TPO Membrane with Adhesive

Standard size .60mil TPO membrane is glued and the seams are overlapped.

Welded Seams

A machine welder is rolled over seams, melting them together create one continual seamless surface.

What is a TPO Roof? Photo of a fully adhered TPO flat roofing system.A photo of a TPO Cool Roof showing how TPO white roofing reflects the sun to keep temperatures cooler on the roof.
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Weather in Washington DC

Raining this week

Now would be a good time to leakproof your flat roof.

The wet season in Washington, DC lasts an average of 4.5 months out of the year. Minor leaks can turn into major issues quickly. Don’t wait until you have to replace more than your roof.

Get a Free Roof Quote

Tips to Manage Roof Leaks

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Trusted by local homeowners.

My husband and I met with Pat Jewell and he was such a pleasure to work with. Very knowledgeable and kind. We felt comfortable with this company.

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Kelly, Google Reviews

We are very pleased with the work that Capitol Improvements did and we would highly recommend and use them again in the future.

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Carlos, Yelp Reviews

They had the most competitive prices and did not try and upsell. Their teams are efficient, professional, very clean, and on time.

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Veronica, Google Reviews

Seth and install team were organized and project went smoothly. Entire team was responsive and kept in touch throughout the process.

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R Mayo, Google Reviews

They replaced my roof including skylights in April 2023 and I am very satisfied. Melinda as my first contact was very professional and got me on the schedule quickly.

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Yasmin, Google Reviews

It was easy to work with Pat to get a quote. We did both a roof on our house and our shed, we also had new gutters put on our den. The crew was very hardworking and efficient.

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Ariana, Google Reviews