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Spray Foam Roofs

Spray foam roofs, protected by polyurea.

Spray foam gives a roof insulation value and slope. It cannot sit bare in the sun. A polyurea surface protects the foam so it can do its job.

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Overview

Spray Foam Roof Coating with Polyurea

Spray polyurethane foam is the insulation layer. On its own it breaks down in sunlight, so it always needs a protective coating. Polyurea makes a tough, seamless skin over the foam that stands up to weather, hail and maintenance traffic.

Existing foam roofs can often be restored. Damaged or wet foam is cut out and replaced, the surface is cleaned, and a new polyurea coating goes on. On new work, foam and coating are applied as one system.

Why polyurea

Why it works here.

Shields the foam

The coating keeps sun and water off the insulation layer.

Takes foot traffic

Polyurea is tougher underfoot than most acrylic or silicone topcoats.

Easy to maintain

Damage can be cut out, refilled with foam and re-sprayed.

Compare polyurea with other roof systems

Process

Most of the work happens before the spray gun comes out.

  1. 01

    Inspect and assess

    A trained applicator walks the roof, checks for trapped moisture, tests adhesion on the existing surface and looks at drainage, flashings and penetrations. You get a written scope for your roof.

  2. 02

    Prepare the surface

    Loose material comes off. Wet or failed areas are cut out and replaced. Fasteners, seams and cracks are repaired, the surface is cleaned, and the right primer goes down for the substrate.

  3. 03

    Detail, then spray

    Drains, curbs, vents and edges are detailed first. Then the polyurea is sprayed with heated plural-component equipment into one continuous, fully adhered membrane at the specified thickness.

  4. 04

    Topcoat and check

    Where the roof sees direct sun, a UV-stable topcoat goes on if the system calls for one. The crew checks film thickness, walks every detail and cleans up.

  5. 05

    Keep it maintained

    Clear drains, keep traffic off where it does not belong and book a periodic inspection. Small damage can be cleaned and re-sprayed in place instead of tearing anything off.

How a polyurea roof gets done

Questions

Questions about spray foam roofs.

All questions
Is the polyurea adding insulation?

No. Polyurea is not insulation. The insulation value comes from the foam underneath.

Can my old foam roof be saved?

Often. If most of the foam is dry and sound, damaged areas are replaced and the roof is recoated.

Does ArmorThane make spray foam?

Yes. ArmorThane makes the ArmorFoam spray foam line as well as polyurea coatings, so foam and coating can come from one manufacturer.

Get your roof looked at.

Tell us about the roof. A trained applicator will follow up to inspect it and scope the work.

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