Owens Corning Duration COOL Re-Roof with Full Tear-Off and Vents
February 2026 · Glendora
A single-layer tear-off and full re-roof of a single-story Duarte home: stripped to the board decking, damaged wood replaced, then Owens Corning Duration COOL shingles in Shasta White with new vents and gutters.
The roof on this Duarte home had quietly reached the end of its run. The shingles were worn flat and shedding granules, the turbine vents had rusted and seized, and summer heat was settling into the house through an aging, under-vented roof. The homeowner was in no rush and weighing more than one bid, so the plan that won the job had to prove itself on the parts you never see, the deck, the venting, and the underlayment, not just the shingle color.
BeforeAfter
Worn, granule-shedding shinglesOwens Corning Duration COOL, Shasta White
Rusted, seized turbine ventsFour O'Hagin vents and a solar attic fan
Old felt and bare spotsDeck Defense with WeatherLock Flex
On a tear-off like this, the shingle is the easy part. We took the roof down to the original board decking, replaced the boards that had gone soft, and swapped the rusted turbines for low-profile vents and a solar fan before the new cool shingle ever went down. Get the deck and the airflow right, and the roof you see lasts the way it should.
Older Duarte homes like this one were sheathed in solid 1x boards instead of plywood, and a tear-off is the only moment you get to see which boards have given up. We replaced about 160 feet of decking, then ran Deck Defense underlayment with WeatherLock Flex at the vulnerable seams. New white edge metal and a Shasta White ridge finished the surface, and fresh insulation went into the attic while the roof was open. The whole job was pulled under permit and signed off at city inspection, not closed out on a handshake.
Owens Corning Duration COOL
Shasta White
Deck Defense underlayment
WeatherLock Flex
O'Hagin vents
Solar attic fan
Leaf guards
From the deck up, this is the kind of cool-roof tear-off we run across the San Gabriel Valley, including nearby Monrovia, Arcadia, and Azusa.
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