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 Winnetka
Roof replacement in Winnetka, CA typically runs $11,000 – $24,000 for a standard single-family home, depending on size, slope, and whether flat sections on garages or additions need a specialized system. Most full replacements take 3 – 7 working days from tear-off to final inspection. If your roof is past year 20 or showing curling shingles, granule loss, or leaks at the transition to a flat garage roof, call us at (650) 456-5615 for a written estimate before any work starts.
Winnetka’s housing stock throws a curveball at generic roofers. The 1950s and 60s ranch homes along corridors like Sherman Way and Saticoy Street often carry original composition shingles on the main roof and a flat or low-slope section over the attached garage or addition. Those flat sections need a different material and drainage approach than the pitched roof, and skipping that detail is how leaks at the transition show up two winters later. Our crews know Winnetka’s block-by-block mix: original shake conversions, 1980s stucco two-stories, and the patchwork of early 2000s composition reroofs near the Orange Line.
Why Crestview Roofing Co Woodland Hills Is Winnetka’s Preferred Roof Replacement Company
Homeowners in Winnetka call us because we put the price in writing before the first shingle comes off. That is the whole point of The Relay Visibility Guarantee: a written price delivered before any work starts, photos of the job before and after, a live trackable arrival time, and a digital invoice sent by text. No ambiguity, no end-of-job surprises.
Dylan Pace runs our replacement crews with a simple standard: if it is not done right, we make it right. Every repair and replacement detail is covered under the 365-Day Done Right Promise, in writing, included with every job. We answer the phone with a live person 24/7, so when a Santa Ana wind event rips shingles off an east-facing ridge on Vanowen Street, you are not leaving a voicemail and hoping.
We work with GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral, and we document compliance with local wind-load and permit requirements on every job. That documentation matters when you are filing an insurance claim or refinancing.
Written by Dylan Pace, Owner at Crestview Roofing, serving Winnetka and the west San Fernando Valley since 2000.
Styles & brands we work with
New Roof Installation in Winnetka
New Roof Installation in Winnetka is the full tear-off and replacement: old shingles, underlayment, and deteriorated decking come off, and a new system goes down to current code. A standard architectural shingle roof on a 1,400 – 1,800 sq ft Winnetka ranch runs $12,000 – $19,000. If the job includes a flat garage section requiring torch-down or TPO, add $3,000 – $7,000 depending on square footage and drainage work.
Wind-Load Compliance on Shingle Roofs
Winnetka sits in a wind zone where architectural shingles must be nailed to a high-wind pattern, not just the standard four-nail or six-nail layout. We verify nailing patterns during tear-off, photograph the underlayment and fastener spacing, and include that documentation with the final permit sign-off. A low quote that does not mention wind-load nailing is a quote that will not hold up to a Santa Ana event.
When the Decking Needs to Go Too
On 1950s and 60s ranch homes, original 3/8-inch plywood or skip sheathing is often delaminated or rotted at the eaves. Replacing decking in sections adds $2 – $4 per square foot, and it is not optional if the plywood crumbles when fasteners go in. We write that condition into the quote after the tear-off, not as a surprise line item at the end.
Reroofing in Winnetka
Reroofing in Winnetka is different from a full replacement: it means layering new shingles over an existing single layer to save on tear-off cost and time. A reroof on a standard Winnetka ranch runs $8,500 – $13,000 when the existing decking is sound and the roof has only one layer. It is a good option for homes with late-1990s or early-2000s composition shingles that are aging out but structurally intact.
Where Reroofing Works, and Where It Does Not
Reroofing works on homes with one shingle layer, no widespread decking rot, and a roof that meets current height and fire code. It does not work on the flat garage sections so common in Winnetka. Those low-slope areas nearly always need the old material fully removed and a torch-down or TPO membrane installed with proper drainage.
On the east side near the Orange Line, many homes had wood shake roofs red-tagged and replaced in the early 2000s with composition shingles. Those roofs are now between 20 and 25 years old, but they age inconsistently because some were installed as reroofs over skip sheathing and some got new decking. We inspect the underlying structure before recommending a reroof, because layering new shingles over a failed decking is a guaranteed callback.
Trusted Brands We Service in Winnetka
We install and service GAF, Atlas, and Boral systems in Winnetka, and we keep common accessories and flashing components in local stock for fast turnaround. GAF Timberline HDZ architectural shingles are a frequent choice for Winnetka ranch homes because they carry a high wind rating when installed to the manufacturer’s nailing pattern. For flat garage roofs, GAF TPO and Atlas torch-down systems are what we specify, paired with tapered insulation where drainage needs help. We are brand-trained and follow manufacturer installation specs, so the material warranty stays intact. If you have a preference for a certain shingle line, we will price it against the written estimate and show you the difference before work starts.
See the difference
Before
After
Before
After
Before
AfterCommon Roof Replacement Problems We See in Winnetka Homes
- Flat garage roofs installed without positive drainage. Winnetka’s winter rains pool on low-slope garage additions when contractors skip tapered insulation or do not relocate scuppers. Ponding water degrades the membrane within a few seasons and leaks into the garage ceiling.
- Shingles rated for high wind but nailed wrong. A high-wind shingle means nothing if the fastening pattern does not match the manufacturer’s spec for Santa Ana wind uplift. We see this on reroofs where the crew reused old nail lines or dropped the nail count to save time.
- Deteriorated decking left in place. On 1960s Winnetka ranches, original plywood is often soft at the eaves and around plumbing penetrations. New shingles over rotted decking fail early, and the city inspector will refuse to sign off if decking is visibly delaminated.
- Leaks at the transition between the main roof and a flat addition. The joint where a pitched shingle roof meets a flat garage roof is the single most common leak point in Winnetka. Proper flashing, membrane overlap, and kickout detail are what stop it, and they are the first things a cheap quote leaves out.
Pricing for Roof Replacement in Winnetka, CA
Expect a full architectural shingle replacement on a typical Winnetka home to run $12,000 – $19,000. A reroof over a single sound layer runs $8,500 – $13,000. A flat garage roof replacement with TPO or torch-down runs $3,000 – $7,000 on its own, and more if the decking is rotted. Full replacement of a 1950s ranch main roof plus a flat garage section typically lands between $15,000 and $24,000. The biggest cost drivers are roof square footage, the number of roof planes, the condition of the decking, and whether the home has flat sections that need a separate system. Every quote we write is itemized and delivered before work begins, and the number on the quote is the number on the invoice. Call (650) 456-5615 to schedule a free estimate.
We Also Serve Cities Near Winnetka
Our crews handle Roof Replacement work throughout the west Valley, including Roof Replacement in Winnetka and the surrounding communities of Canoga Park, Reseda, Tarzana, and West Hills. If you are in one of those neighborhoods and need a written estimate, the process is the same: a set price before work starts, photo documentation, and a one-year guarantee in writing.
Serving Winnetka, CA - Our Local Coverage Area
We’re based in the Winnetka 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 Winnetka
A new shingle roof in Winnetka must meet the manufacturer’s high-wind nailing pattern for the product’s wind rating, typically ASTM D3161 Class F or ASTM D7158 Class H for architectural shingles, with fastener spacing verified during tear-off. We photograph the nailing pattern, the underlayment, and the fastener type before the shingles go down, and we include those photos with the permit documentation. That record matters when you file an insurance claim after a wind event, because the insurer will ask for proof the roof was installed to spec. Call (650) 456-5615 if you want a quote that includes this documentation by default.
Flat and low-slope roofs on Winnetka garages need a torch-down or TPO membrane because shingles rely on gravity to shed water, and at slopes below 2:12 they let water pool and seep. Shingle manufacturers will not warranty their product on a low-slope roof, and shingling a flat garage is a guaranteed leak at the wall transition and the scupper. We install GAF TPO or Atlas torch-down with tapered insulation where needed so water moves instead of ponding. Call (650) 456-5615 for an exact quote on a flat roof replacement.
A compliant roof replacement in Winnetka can reduce homeowners insurance premiums, especially when the roof has a documented high-wind installation, a Class A fire rating, and proof of permit sign-off. Insurance carriers in California are tightening underwriting on older roofs, and a documented replacement is a concrete factor in renewal pricing. We provide the permit record, manufacturer warranty registration, and installation photos so you can send a complete packet to your insurer. Call (650) 456-5615 and we will walk you through what the documentation package includes.
Some early 2000s composition roofs near the Orange Line in Winnetka age differently because many were installed as reroofs over original skip sheathing during the post-wood-shake replacement wave, while others received new plywood decking. The roofs with original sheathing develop uneven wear, nail pops, and ridge sag sooner. We inspect the decking condition before recommending reroofing versus full replacement. Call (650) 456-5615 for an inspection that tells you which category your roof falls into.
A compliant Winnetka roof replacement quote includes decking replacement where needed, high-wind nailing patterns on shingles, a separate torch-down or TPO system for flat sections, ice and water shield at eaves and transitions, permit fees, and final inspection scheduling. Cheap quotes leave out the flat roof system, skip decking replacement, use standard nailing patterns, and omit permit costs, then add them as change orders mid-job. Our written price covers all of that before work starts. Call (650) 456-5615 for a free estimate that is actually complete.
Written by Dylan Pace, Owner at Crestview Roofing, serving Winnetka and the west San Fernando Valley since 2000.