Roof rejuvenation questions, answered

Roof rejuvenation is a liquid treatment sprayed onto aging asphalt shingles. It is meant to soak into the shingle and help bring back some of the flexibility that sun and heat bake out of it.

No. A roof coating forms a film that sits on top of the roof. Rejuvenation is a diluted treatment meant to soak into asphalt shingles, and SoyLei, the maker of the product we use, says it is "not a roof coating" .

It can make faded shingles look somewhat darker, but it won’t change their color the way paint would. SoyLei, which makes the treatment we use, says treated shingles "may appear darker or refreshed" , especially on a sun-bleached roof.

We don’t put a number of years on it, because no field study has shown how long a treatment holds up on a Phoenix roof. SoyLei, the maker of the product we use, says to reapply every five years.

It can. Some shingle makers, Owens Corning among them, have published bulletins advising against field-applied rejuvenators, and a treatment can affect your shingle warranty.

Nobody can say for sure yet. SoyLei, the maker of the treatment we use, tested it in the lab at about 140°F and has published no field data from Arizona or any desert climate.

Fall through spring is usually easiest, outside the hottest weeks and outside monsoon season. Summer work is possible, scheduled around the heat for the crew’s sake, and from mid-June to the end of September we plan around storms.

Those granules come off your asphalt shingles. As shingles age, the asphalt dries out and loses some of its grip on the granules, and rain washes the loose ones down into the gutters and yard.

No. We treat asphalt shingle roofs only. The product we use is made for the asphalt in shingles, and tile, foam and metal roofs need a different kind of roofer and a different kind of care.

It may be, if shingles are cracked, torn, missing or lifting, if the mat shows through, or if the roof leaks. Those roofs need repair or replacement, not a treatment.

We come out, confirm the roof is asphalt shingle, check the shingles up close, and tell you whether rejuvenation fits. The visit costs nothing. If your roof isn’t a fit, you’ll hear that, along with the reason.

For a typical single-family shingle roof, the work usually fits in one visit. The exact time depends on the roof’s size, pitch and height, how much prep it needs, and the weather.

It depends on your roof. Size, pitch, height, how many slopes and valleys it has, and how much prep it needs all change the cost. For a rough number, use the instant roof estimate , and for a firm price, book a free roof evaluation.

It might. Many HOAs have rules about roof work and about changes to how a home looks, and a treatment can make shingles look darker. Read your HOA’s rules, or ask the board or architectural committee, before anything goes on the roof.

We serve the Phoenix metro, including Phoenix, Mesa, Chandler, Gilbert, Queen Creek, Buckeye, Tempe, Scottsdale, Glendale, Peoria, Surprise, Goodyear, Avondale, Fountain Hills and Sun City West. We treat asphalt shingle roofs only.