Owens Corning Duration COOL Re-Roof with Full Tear-Off and Vents
February 2026 · Duarte
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.
.
Looking for a roofing contractor in Los Angeles County?
If this project has you picturing your own home, you're not alone. These are the questions we answer most often for homeowners deciding to move forward, so you know exactly what working with us looks like.
For a single-story home around this size, plan on roughly a week of field work once the crew is on site. On this Duarte project we started the tear-off on a Saturday, had shingles going on by the middle of the next week, and wrapped with leaf guards a few days after that, about one week start to finish. Weather and any hidden wood repair can stretch that, which is why we watch the forecast before we open a roof.
For a sun-exposed roof, the reflectivity does real work. Owens Corning makes its Duration COOL shingles with solar-reflective granules and rates them to meet California's Title 24 cool-roof requirements, so less of the sun's heat loads into the attic in the first place. Paired with good ventilation, that is the combination that actually moves the needle on a hot upstairs, not just a lighter color.
Turbine vents are the spinning metal globes you see on older roofs; they move air when the wind turns them, but the bearings rust and seize over time, which is exactly what we found here. O'Hagin vents are low-profile static vents that sit almost flush with the shingles, so they vent the attic without the moving parts or the bulky look. On this roof we replaced the rusted turbines with four O'Hagins and added a solar attic fan for steady airflow.
Yes. A full tear-off and re-roof is permitted work, and the job is meant to pass a city inspection before it is closed out. This Duarte project was pulled under permit and signed off at final inspection, so the homeowner has a documented, code-checked roof rather than a handshake. If a contractor offers to skip the permit, that is a flag worth paying attention to.
A project manager visits your home, measures, and helps you plan the work around your budget. Free, no-obligation estimates for construction, remodeling, and renovations across Los Angeles and Orange County.
Thanks for reaching out. Our team will be in touch within one business day to schedule your home visit.
TALK TO A PROJECT MANAGERSpeak With a Real Project Manager
Have a project in mind or need to think it through? Talk it over with a dedicated project manager who can answer questions and walk you through your options, with no pressure.
Thanks for reaching out. A project manager will call you back within one business day to talk through your project. No pressure, and no obligation.
ASK US ANYTHINGHave a Question? We're Happy to Help.
Ask about your project, our services, timelines, or anything else. A real, local representative will get back to you, with no obligation and no pressure.
Thanks for reaching out. A real, local person will get back to you within one business day with an answer. No obligation.
