Will spray foam stop a roof leak?

Foam seals well when it goes onto a clean, dry, prepared surface and gets its protective coating. Sprayed over wet foam or a wet roof, it traps the water. The repair has to find the leak, cut out wet material and then foam and coat.

How long does a foam roof last?

It depends mostly on the coating. The foam lasts as long as the coating keeps sunlight off it, so recoating on the manufacturer's schedule is what keeps it going. Ask for the coating's recoat interval in writing.

Can I patch a small hole in a foam roof myself?

A small puncture in dry foam can be sealed with a product the coating manufacturer approves for it. Blisters, soft spots and anything wet need a roofer, because the damaged foam has to be cut out first.

Foam Roof Repair in Tempe, AZ

Foam Roof Repair Services

A foam roof is one continuous layer, so damage in one spot can be cut out and rebuilt without touching the rest. What matters is catching it before water gets into the foam around it.

Roofer cutting out a blistered section of spray foam on a flat roof before patching it

Blister and Puncture Repair

Blisters are pockets where the foam or coating has lifted, and punctures come from dropped tools, foot traffic or debris. The repair cuts the damaged foam back to solid, dry material, fills the hole with new foam or a compatible sealant, and coats it to match the surrounding roof. Wet foam around a puncture has to come out too, or the patch won't hold.

Bird Damage Repair

Birds peck at foam once the coating is worn or cracked, leaving small holes and exposed foam. Repairs clean out the damaged spots, fill them and recoat. Bird damage in many places is a sign to check the whole coating, not just the holes.

Worn tan spray foam roof being recoated with white elastomeric coating by roller

Recoating Worn Foam

The coating protects the foam from sunlight. Once it wears thin, the foam surface starts to break down. The code allows a new coating over an existing coating or foam roof without a tear-off, provided the roof isn't water-soaked or deteriorated. A recoat means washing the roof, cutting out and patching damaged foam, priming where the manufacturer calls for it, and applying acrylic (ASTM D6083), silicone (ASTM D6694) or moisture-cured polyurethane (ASTM D6947) coating to the specified thickness. See roof coating.

Parapet and Scupper Edges

Where a foam roof ends at a stucco parapet, water drains out through scuppers. The joints where foam meets the parapet cap, the wall and the scupper join different materials, and a cracked seal there lets water behind the foam. Unless a roof sheds water over its edges, the code requires a drain at each low point, so a blocked or cracked scupper is a repair priority.

Roller spreading white elastomeric coating over weathered spray foam on a flat roof behind a stucco parapet

Why Tempe homeowners call Tempe Expert Roofing

Free, no-obligation roof estimates
Written scope: tear-off, underlayment, flashing, coating
Photos of every finding on your roof
Permit and code questions answered up front
One call, one local roofer

What Affects the Cost of a Foam Roof Repair

How many damaged spots there are, and how big.
Whether water has gotten into the foam around them.
Whether the job is spot repairs or a full recoat.
The coating product and the thickness it needs.
Parapet, scupper and equipment details.

Signs a Foam Roof Needs Repair

Bare tan or orange foam showing through the coating.
Blisters, soft spots or small holes, especially near where people walk.
Water that sits for days after rain instead of draining off.
Cracks where the foam meets parapet walls, scuppers, pipes or AC stands.
Stains on ceilings under the flat section.

A roofer can core a small sample to check whether moisture has gotten into the foam. That test is what separates a repair and recoat from a replacement. For a new system or a full replacement, see foam roofing.