Free roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Before
After
Before
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Before
AfterFast, Reliable Roof Installation Across Downey
A full roof installation in Downey typically costs between $11,500 and $24,000 for a standard single-family home, with most architectural shingle tear-offs landing around $15,000 to $19,000. The work usually takes 2 to 4 days from tear-off to final inspection, depending on decking condition and weather. If you’re weighing a re-roof against a full tear-off, we’ll walk you through exactly what your roof needs and what it costs before you commit to anything. Call (325) 246-5075 for a free, written estimate.
Downey has its own roofing reality. The housing stock skews older, much of it built between 1940 and 1970, and those original roofs have been through decades of Santa Ana wind cycles. We know the streets, the typical lot sizes, and the way the Building & Safety Division schedules inspections. When you call, a live person answers, and we’ll schedule a time that works for you.
Why Crestview Roofing Is Downey’s Preferred Roof Installation Company
We built Crestview Roofing on a simple idea: you should know what a roof costs before the first shingle comes off. Every job starts with a written price, delivered before work begins. That number is the number on your invoice. No change orders invented at the door, no “we found something unexpected” markups unless we document it with photos and walk you through it first.
Every crew member who steps onto your property is background-checked and in uniform. You’ll know who is arriving before they pull into your driveway, with a live trackable arrival time sent to your phone. That’s the Relay Standard, and it’s part of every job we do. After the work is done, you get before-and-after photos and a digital invoice by text.
Dylan Pace leads our team, and he holds every installation to the 365-Day Done Right Promise. If a covered repair fails within a year, we come back and correct it at no charge. That includes a free second visit if something goes wrong. In writing, on every job, no negotiation.
Downey homeowners tell us the same thing: they want a roofer who shows up when promised and doesn’t go quiet after the check clears. That’s the whole reason Crestview exists. Dispatch and scheduling are coordinated from our Los Angeles office, and crews serve Downey locally, so we can take care of your inspection and installation without routing through some distant call center.
Roof Ventilation in Downey
Roof ventilation in Downey is not a nice-to-have. Hot, dry summers push attic temperatures past 140°F on a July afternoon, and without proper airflow, your shingles bake from both sides and your air conditioner works harder than it should. Ventilation also matters in winter, when cool, damp air trapped under the decking condenses and feeds rot into the framing.
Intake and Exhaust Pairing
A balanced system moves air in through soffit vents and out through a ridge vent or box vents at the roofline. In older Downey ranches, we commonly see soffits that were painted over or insulated in a past remodel, blocking the intake side entirely. If new shingles go over that, the attic becomes a sealed oven. During a full installation, we’ll inspect the soffit channels and recommend whatever correction is needed before the new roof goes on.
Including new ridge vent in a Downey roof installation runs $1,200 to $2,400 added to the job, depending on roof length and whether we need to cut the sheathing back at the peak. Adding soffit vents alongside it costs around $25 to $45 per vent installed.
When Ventilation Work Should Happen
Ventilation should be addressed while the roof is off, not as an afterthought. Cutting ridge vent into an existing roof is possible but messier. During a tear-off, everything is exposed, and the work goes faster and cleaner. If you’re already paying for a full installation, folding ventilation into the same project saves you a second mobilization charge later.
Roof Flashing Installation in Downey
Roof flashing installation in Downey is where a lot of cheaper bids fall apart. Flashing is the metal material that seals the joints where your roof meets a wall, chimney, skylight, or vent pipe. When it fails, water gets in. In Downey, wind-driven rain from Santa Ana storms finds every gap around flashing that wasn’t set or sealed properly.
Replacing Flash While the Roof Is Off
During a full installation, we recommend replacing all visible flashing rather than reusing old pieces. Galvanized flashing from the 1960s and 1970s is often rusted through in places you can’t see until it’s removed. New flashing in Downey costs $400 to $1,200 for a typical single-story ranch, depending on how many penetrations and valleys your roof has. For a two-story home with multiple pipes, dormers, and a chimney, budget $1,000 to $2,500.
Chimney and Valley Flashing
Chimney flashing takes the most abuse. It’s exposed to the hottest sun and the most direct wind. We cut reglet lines into the mortar and set step flashing into them, then seal the top with a counterflashing and sealant rated for 50-plus years. Valley flashing, where two roof planes meet, is another common failure point in Downey. If your old roof had woven shingles in the valleys and leaks started there, switching to a metal valley during the new install gives you a cleaner water path and longer life.
Trusted Brands We Service in Downey
We install and repair using manufacturer-backed materials from GAF, CertainTeed, Owens Corning, and more. For Downey’s wind exposure, we often recommend CertainTeed Landmark architectural shingles for their 130 mph wind rating with proper installation. Our crews keep local parts on hand for Downey jobs, which means less waiting on a supply run and faster turnaround when you’re mid-project and the weather turns. This page walks through the step-by-step Downey tear-off, decking repair, and inspection sequence so you can spot a bid that skips local code requirements before signing anything.
Common Roof Installation Problems We See in Downey Homes
- Overlay requests on 1950s ranches. We hear it all the time: “just put new shingles over the old.” On a 1950s ranch in the Orange Estates neighborhood, our crew stripped three layers of old dimensional shingles, replaced a 12-foot section of dry-rotted fascia and two cracked decking panels, then installed CertainTeed Landmark architectural shingles with a starter strip, 6-inch drip edge, and a ridge vent. The homeowner initially wanted to just overlay, but seeing the split decking under the valleys convinced them a full tear-off was the only safe option.
- Skipped ice and water shield at the eaves. Downey codes require ice and water shield at all eaves and valleys. Low bids skip it to shave cost, and the first Santa Ana-driven gutter backup leaks through the soffit. We include it on every installation, no exceptions.
- Exposed decking and surprise rain. Downey’s Building & Safety Division reviews plans and schedules inspections on their calendar, not yours. If a rare February storm rolls through while your roof is torn off and waiting on an inspection, uncovered decking soaks up water and you get interior damage. We tarp and monitor the roof through every inspection gap, and we coordinate with the city to minimize open-roof time.
- Undersized nailing patterns. Downey sits in a Class 4 wind zone where hot, dry Santa Ana gusts regularly hit 60 to 70 mph. Shingles installed with six nails per course hold the 130 mph wind rating. Four-nail shortcuts, which some crews take, drop that rating and leave you fighting shingle blow-offs every autumn.
Pricing for Roof Installation in Downey, CA
A standard architectural shingle tear-off and re-roof on a 1,500 to 2,000 square foot Downey home runs $11,500 to $19,000. Larger homes or steep pitches push that toward $24,000. Asphalt shingles are the most common choice here, with GAF Timberline, CertainTeed Landmark, and Owens Corning Duration all performing well. Tile roofs, which appear on some Downey homes, run $25,000 to $45,000 for a full install with underlayment replacement.
What changes the number: decking condition, roof pitch, number of layers to remove, and whether you add new ventilation or flashing. Every bid we give is written, line-itemed, and fixed. You’ll see all of that before you sign. Call (325) 246-5075 to schedule your free estimate.
We Also Serve Cities Near Downey
Our Roof Installation crews work throughout the southeast Los Angeles County area. In addition to Downey, we regularly serve Bell Gardens, Santa Fe Springs, Paramount, and Bellflower. If you’re a few blocks outside city limits, call us and we’ll confirm coverage for your street.
Serving Downey, CA – Our Local Coverage Area
We’re based in the Downey area and know this community well. Use the map below to see our service coverage – if you’re nearby, we can almost certainly help.
FAQs About Roof Installation in Downey
Yes, Downey requires a building permit for a full roof replacement. The Building & Safety Division reviews the project scope, issues the permit, and schedules inspections at key stages: after tear-off and decking repair, after underlayment and flashing are set, and at final completion. We handle the permit paperwork and coordinate inspections as part of every installation. Call (325) 246-5075 for a quote and we’ll walk you through the full timeline.
A typical full tear-off and re-roof in Downey takes 2 to 4 days of active work. The inspection schedule can add 1 to 3 days depending on city availability. Most jobs are fully complete and signed off within a week. We’ll give you a written schedule before work starts so you know which days the crew will be on your roof.
Yes, when it’s installed to Class 4 wind zone standards. That means fully adhered ice and water shield at all eaves and valleys, enhanced nailing patterns, and properly sealed flashing. Architectural shingles rated to 130 mph will hold up to the 60 to 70 mph gusts we get during Santa Ana events when installed correctly. We install to those standards on every Downey roof.
The most common change order is decking repair. If we pull off old shingles and find rotted or cracked decking panels, we document it with photos and show you exactly what needs replacing before adding anything to your bill. That’s the only major variable on a Downey roof, and we flag it as a likely item during our initial inspection so the written estimate accounts for it. Call (325) 246-5075 for an exact written quote.
Ask three questions. First: does the bid include ice and water shield at eaves and valleys, or is that an add-on? Second: what nailing pattern will the crew use, and will the shingle manufacturer’s wind warranty apply? Third: is the price written and fixed before tear-off begins? A bid that skips the shield or the sixth nail is cheaper on paper and more expensive in a windstorm. We give you a line-itemed written price before work starts, and it includes everything the Downey code requires. That makes side-by-side comparison straightforward.
Written by Dylan Pace, Owner at Crestview Roofing, serving Downey’s roofing needs since 2000.