Metal roofing
Architectural shingles
Tile roofing
GAF
Owens Corning
Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Fast, Reliable Roof Replacement Across Whittier
Roof replacement in Whittier runs $9,500 to $22,000 for most homes, depending on size, pitch, material, and what we find once the old roof comes off. We respond to Whittier calls same day for inspections, and most full replacements are underway within 7 to 14 days of a signed contract. If you’re in 90605, 90603, or anywhere across Whittier, call (866) 974-2271 and we’ll schedule a free estimate. Manny Cordero leads our team, and we’ve been working on Whittier roofs long enough to know exactly what these older San Gabriel Valley homes hide under their shingles and tile.
Whittier is not new-construction territory. Between the 1920s bungalows near Uptown and the 1950s to 1970s ranch tracts east of Colima Road, most roof work here is re-roofing on structures that have been patched and layered for decades. That changes how a roof replacement should be quoted, planned, and executed. We’re roofing specialists, not generalists, and we run every Whittier job with that older-home reality in mind.
Key takeaways:
- Most full roof replacements in Whittier cost $9,500 to $22,000, with flat roof sections running $6 to $9 per square foot.
- Older Whittier homes with layered shingles often need decking repair once the old roof is stripped.
- We’re a roofing-only contractor working with GAF, Owens Corning, CertainTeed, and four other major brands.
- Free estimates include a written inspection of sheathing, underlayment, and flashing before any work is approved.
- Call (866) 974-2271 for a free Whittier roof replacement estimate.
Why Koreatown Roofing Is Whittier’s Preferred Roof Replacement Company
Koreatown Roofing has built its name on neighborhood accountability. We are not a franchised call center dispatching rotating crews. When you call us from Whittier, you talk to a roofing company whose reputation lives and dies on how we treat the communities we serve. Manny Cordero knows that our Whittier work gets talked about at the local hardware store, at PTA meetings, at Sunday services. That’s accountability a distant corporate office never feels.
Whittier homeowners tell us the same thing again and again: they want a contractor who does roofs and only roofs. That’s us. Roof Replacement is not a side line for our business. It is the business. We spend every working day tearing off old shingles, repairing hidden decking, and installing new roofing systems. We are not juggling kitchen remodels or bathroom additions. One trade, every day.
We also work with seven roofing manufacturers, so when you sit down with us in Whittier, you get real material choices. GAF, Owens Corning, CertainTeed, IKO, Atlas, Tamko, and Boral. No single-supplier pressure. The right product for your roof, your budget, and Whittier’s hot dry summers.
Our Whittier customers appreciate that we carry local knowledge into every quote. We know the permit office on Painter Avenue. We know the older Uptown homes with clay tile profiles that have been discontinued for 40 years. We know the 90603 east side tracts where three layers of composition shingle hide rotten decking. That local expertise changes the conversation from a blind bid to an informed plan.
Styles & brands we work with
Flat Roof Replacement in Whittier
Flat Roof Replacement on Whittier homes costs $6 to $9 per square foot for a full tear-off, new underlayment, and a quality membrane or modified bitumen system. Many Whittier homes built in the 1950s and 1960s have flat or low-slope sections over carports, patios, or added family rooms, and these areas are where we see the most ponding and leak damage after winter rains. Failed underlayment and flashing around penetrations on older tile roofs are the usual culprits, and a flat section that has been patched repeatedly is usually past repair.
The hot San Gabriel Valley sun bakes flat roofing materials. Asphalt-based membranes dry out and crack. Standing water finds its way through those cracks and into the sheathing below. By the time a Whittier homeowner sees ceiling stains, the decking often needs work too. That’s why we treat every flat roof replacement as a full inspection job, not a simple layover.
Tear-off and decking inspection
We remove the old roof down to the decking on every flat section. On Whittier homes with decades of patches, we regularly find rotted or waterlogged sheathing that must be replaced. That work gets documented with photos, priced in writing, and approved by you before we proceed.
Membrane and underlayment selection
For flat sections, product choice matters more than on a pitched roof. We walk you through the membrane options, including TPO and modified bitumen, based on whether the section gets full sun, nearby trees, or pooled water. Your roof, your material choice. We install what fits your Whittier home’s actual conditions.
Roof Installation in Whittier
Roof Installation for a full re-roof on a typical Whittier single-family home runs $9,500 to $22,000, with architectural shingle jobs on standard ranch homes often landing around $13,000 to $16,000. For homeowners in Whittier’s older tracts, “roof installation” rarely means new construction. It means a complete tear-off of existing layers, repair or replacement of damaged decking, new underlayment, and a properly installed roofing system that will last for decades.
The pre-1960s homes near Uptown and the 1950s through 1970s ranches on the east side were built to different code standards than today. Many have undersized rafters, skip-sheathing, or composition shingles that dried out decades ago under the Whittier sun. A proper roof installation here always starts with what’s underneath, not with what goes on top.
New construction and full re-roofs
While Whittier has little new construction compared to newer San Gabriel Valley suburbs, we do handle new construction roof installation for additions, ADUs, and the occasional full rebuild. On those jobs, we install from scratch: decking, underlayment, flashing, and the shingle or tile system you select from our seven-brand lineup.
Architectural shingle installation
Most Whittier homeowners choose architectural shingles for their balance of price and lifespan. We install GAF in Whittier and Owens Corning architectural lines frequently, and those products handle Whittier’s heat cycling well when paired with proper attic ventilation. We include ridge vent installation where existing ventilation is inadequate. That matters in Whittier. Hot attics shorten shingle life.
Trusted Brands We Service in Whittier
You already know the brands on your roof. GAF. Owens Corning. CertainTeed. Boral. We work with all of them, plus Atlas, IKO, and Tamko, which is one of the broadest manufacturer selections you’ll find from a single roofing contractor in Whittier. That means when we recommend a product, it’s because the product fits your home’s roof profile, your budget, and Whittier’s climate. Not because we have one truckload sitting in a warehouse. If your Uptown home has a discontinued Boral clay tile profile, we can often source matching pieces through our manufacturer relationships. The same goes for Owens Corning shingle colors that big box stores stopped stocking five years ago. One contractor, every stage, with real brand options behind it.
See the difference
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After
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After
Before
AfterCommon Roof Replacement Problems We See in Whittier Homes
Whittier’s housing stock is old enough that roof problems follow predictable patterns. Here are four we see constantly across 90603, 90604, 90605, and the older core.
- Multiple shingle layers hiding rotted decking. Many Whittier homes have two or three layers of composition shingle that were added over decades of cheap re-roofs. The extra weight and trapped moisture rot the sheathing underneath. We only find the full extent after tear-off.
- Failed underlayment and flashing on aging tile roofs. The Spanish and California-style stucco homes near Uptown often have beautiful clay or concrete tile that’s 60 to 90 years old. The tile may look fine, but the underlayment is shot. Leaks at valleys, chimney flashings, and pipe penetrations get worse every winter.
- Skipped drip edge and undersized fascia. On mid-century Whittier homes, improperly installed drip edge lets water wick back into the sheathing. We see this especially on low-slope sections where water lingers after storms.
- Ponding on flat sections. Flat roofs over patios, carports, and additions hold water after rain. In Whittier’s dry summers, the alternation between ponding water and intense heat cracks membranes faster than anything else.
On a 1950s ranch in the 90603 tract, our crew pulled three layers of aging composition shingle and found skip-sheathing over the entire south slope. We replaced the decking, added ice and water shield in the valleys, and installed new architectural shingles with a ridge vent, all approved in writing before we started. That is what opening up an older Whittier home actually turns up, and it is why our quotes are built around inspection first.
Pricing for Roof Replacement in Whittier, CA
Roof replacement in Whittier typically runs $9,500 to $22,000 for full tear-off and new installation. A standard 1,500 square foot ranch with architectural shingles generally lands between $13,000 and $16,000. Flat roof sections run $6 to $9 per square foot. Clay tile and premium synthetic options push toward the higher end of the range. The factors that move your Whittier quote include roof pitch, number of existing layers, decking condition, and whether your home has a tile profile that needs custom sourcing. The single biggest wildcard on older Whittier homes is hidden decking damage. We handle that with written allowances in your contract. No surprise gets priced and approved after the fact without your signature. Call (866) 974-2271 for a free written estimate with real numbers specific to your roof.
We Also Serve Cities Near Whittier
Koreatown Roofing regularly works across the Whittier area, including Roof Replacement in Whittier and the surrounding communities of South Whittier, West Whittier-Los Nietos, East La Mirada, and Santa Fe Springs. If you’re in one of these nearby cities, give us a call at (866) 974-2271. We’ll send a roofing specialist, not a general contractor, to inspect your roof.
Serving Whittier, CA — Our Local Coverage Area
We’re based in the Whittier 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 Replacement in Whittier
We document the damage with photos, price the decking repair in writing, and get your approval before we install any new material. Tear-off on older Whittier homes often reveals decking that was not visible during the initial inspection. We plan for that by writing decking allowances into your contract up front. That keeps the process honest and you always know the number before we proceed. Call (866) 974-2271 for an estimate that includes a decking inspection plan.
We pull permits on every roof replacement and build to current California building code, which usually means upgraded underlayment, proper ventilation, and sometimes additional roof-to-wall connections. Older Whittier homes were built before modern seismic and moisture codes existed. Our crew knows what the Whittier building department expects and we include those upgrades in your quote from the start. Manny Cordero signs off on the permit plan before we submit it.
Yes, in most cases we can source matching or compatible tile through our relationships with Boral and other manufacturers, but it takes planning. Discontinued clay and concrete tile profiles are common on Uptown Whittier homes. We start sourcing early so you aren’t waiting on a roof. Where an exact match is impossible, we’ll show you compatible alternatives before any material gets ordered.
We install GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral. Seven major manufacturers, no single-brand agenda. Your Whittier home’s roof profile and budget drive the recommendation. If you prefer Owens Corning architectural shingles, we install them. If Boral tile is right for your Uptown Spanish-style home, we can do that too.
We install the right membrane or modified bitumen system for the specific slope, add proper flashing at every penetration, and make sure drainage keeps water moving off the roof. Flat sections on Whittier homes need more than a cheap patch. We rebuild them from the decking up so ponding water doesn’t become a recurring problem. Call (866) 974-2271 for a free estimate on your flat roof section.
Whittier homes need roof replacements done right, with a plan for what the old roof hides. Call (866) 974-2271 to schedule your free estimate. We’ll walk your roof, inspect the decking, and give you a written line-item quote with real numbers. Your roof, your material choice.
Written by Manny Cordero, Owner at Koreatown Roofing, serving Whittier and the surrounding San Gabriel Valley communities.