Problem · chalking

Chalking and faded coating

Chalking is the coating's UV blockers turning to powder. It is the roof telling you, politely and well in advance, that the recoat window is open. Ignore it for two or three summers and the foam underneath starts to go.

Call (602) 555-0199 Get a written quoteMon–Sat 7am–6pm · storm-week hours extended

YOUR AVERAGE FOAM ROOF — foam for insulation and slope, a thin top coat for the sun. The coat (peeled back here) is the part that wears out, and the part that is cheap to renew.
Note: additional layers not shown for simplicity / difference in roof systems.

The 30-second chalk test

Rub a dark cloth or your palm firmly across the coating in direct sun.

Tap a result.

The sequence, if nothing is done

Year 5–7: light chalk; colour fades from white to grey-tan; reflectivity drops and cooling bills creep up.
Year 7–9: heavy chalk; coating thins to bare foam at high points and edges; first pinholes; birds move in.
Year 9–12: foam yellows and pits; surface erodes; water absorbed; soft spots; leaks after each storm.
Beyond: saturated sections need cut-out; the recoat has become a partial re-roof at 3–5× the price.

Recoat-due calculator 5 / 7 year schedules

Valley foam roofers publish recoat intervals from 5 years (Durafoam) to 5–7 (Travek) to 8–12 (Arizona Roof Co). We show the two shorter schedules because Phoenix UV is the worst case.

Year the foam was installed Year of the last top coat (same as install if never recoated)

Don't know the install year? The Maricopa County Assessor shows the home's build year; a roofing permit on file with your city gives the re-roof year.

A recoat at step 1 is $2–$4/sq ft and keeps the whole roof. What a recoat includes →

Questions people ask

What does chalking on a roof coating mean?

The acrylic binder is breaking down under UV and releasing pigment as powder. It is normal ageing and the signal that a recoat is due within a season or two.

Can I wash a chalked roof instead of recoating?

Washing removes the powder but not the cause; the coating keeps thinning. Washing is step one of a recoat, not a substitute.

Does a faded roof raise my electric bill?

Yes — reflectivity drops as the white coat greys and chalks. A fresh top coat restores it, which is part of why recoats pay back faster than people expect.

Talk to a licensed foam roofer today
Calls go straight to a licensed Arizona roofing contractor. Free inspection, written quote, no pressure.

(602) 555-0199

LAST REVIEWED 2026-11-01 · Prices on this site are published Valley rates and estimates, not a quote.