Metal roofing
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Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Fast, Reliable Roof Repair Across West Hills
Roof repair in West Hills runs $450 to $2,800 for most jobs, with leak repairs typically landing between $350 and $950 and full slope re-roofs starting around $4,500. We get that you want a straight answer before a stranger climbs onto your house for a Roof Installation - West Hills or repair. That’s why every Mercer Roofing Co Woodland Hills job starts with a written price, and why the technician’s name and photo arrive by text before we pull into your driveway. Grant Whitlock founded this company in 2000 on one idea: the person who fixes your roof should be someone you can look up, badge in hand, before they ever set foot on your property. Call (341) 217-2677 and a live person picks up, day or night.
West Hills roofs take a beating that most of the Valley doesn’t. We know the ranches off Vanowen and the hillside lots near Bell Canyon. We know the low-slope sections over carports and family rooms that pond after a hard rain. And we know the county’s fire code well enough to tell you before we start whether a patch is legal or whether the inspector will require a Class A upgrade. That local knowledge is the difference between a repair that holds and one that fails its next inspection.
Why Mercer Roofing Co Woodland Hills Is West Hills’s Preferred Roof Repair Company
West Hills sits inside Los Angeles County’s Wildland-Urban Interface, or WUI, zone. That single fact changes how we scope nearly every roof repair here. Patching a few damaged wood shakes on one slope can legally trigger a requirement to upgrade that entire roof plane to Class A fire-rated materials. This mandate doesn’t apply to homes in Woodland Hills or Canoga Park, which sit outside the WUI boundary. Homeowners find out when the patch is done and the county won’t sign off. We flag it before the first nail goes in.
Our Roof Repair team also works around how West Hills homes were actually built. Most are mid-century ranches from the 1950s through 1970s, framed with 3/8-inch CDX decking. Original ridge vents on these roofs are often nailed only into that thin sheathing, not through to the rafters. A Santa Ana gust over 60 mph rips them clean off. A quick patch won’t hold here. You need fasteners driven into structure, and you need someone who checks that before quoting.
We answer our phones with a real person. Not a callback form, not a voicemail tree. That matters when water is coming through the ceiling at 7 p.m. and you want to know who’s coming. Every Mercer technician arrives in a clean uniform with a photo ID badge. Their name and photo are sent to you before arrival. That’s the Threshold Verified standard, and it’s written into how every independently owned Mercer location operates.
Styles & brands we work with
Commercial Roof Repair in West Hills
Commercial Roof Repair in West Hills covers the low-slope and flat roof systems on the area’s ranch-style homes with attached shops, detached ADUs, and small commercial buildings along Platt Avenue and Sherman Way. The work involves stripping damaged membrane or shingle sections, repairing rotted decking around penetrations, re-flashing curbs and drains, and installing new roofing that meets LA County WUI code. On a West Hills commercial or mixed-use structure, a repair typically runs $900 to $4,200 depending on decking damage and the number of penetrations. Access matters too: if the building sits on an open lot with septic and well setbacks, staging materials without driving over a leach field changes how we scope the job before quoting.
Low-Slope and Flat Roof Patching
Flat sections on West Hills ranch homes and shop buildings hold morning moisture from the coastal marine layer. That moisture sits on granules and accelerates wear around plumbing vents and drains. We patch these systems with materials matched to the existing membrane, then check the slope for ponding. If water is standing for more than 48 hours after rain, the patch alone won’t solve the problem long term.
Decking Repair Around Rooftop Equipment
Commercial-style roofs in West Hills often carry HVAC units, swamp coolers, and exhaust fans. The decking around these penetrations rots first because the original curbs and flashings were installed over thin CDX. We cut out the rotted section, replace it with code-rated sheathing, and re-flash the curb before re-roofing the area. The goal is a repair that passes county inspection the first time.
Roof Leak Repair in West Hills
Roof Leak Repair in West Hills usually starts at a plumbing penetration, a valley, or a low-slope transition on a 1960s ranch. We charge $350 to $950 for most leak repairs, which covers locating the entry point, replacing damaged flashing or underlayment, and sealing the area with materials rated for this microclimate. The marine layer here means morning condensation sits on shingles and flat sections longer than it does a few miles north in Canoga Park. That’s why granule loss and bald spots around penetrations show up earlier on West Hills roofs. DIY patches around chimneys and skylights often fail within a year because standard alloy flashing corrodes fast in the UV plus salt air combination we get off the coast.
Valley and Flashing Leak Repair
Valleys on older West Hills ranches were often built with woven shingles or thin metal that has since cracked. We open the valley, replace the underlayment with a self-adhered membrane, and install new metal or shingles matched to the roof. Flashing around chimneys and skylights gets the same treatment: remove, inspect the decking underneath, re-flash with corrosion-resistant material, and seal.
Vent Boot and Pipe Collar Replacement
The rubber boots around plumbing stacks crack from constant sun exposure on these roofs. Water follows the pipe into the attic and shows up as a ceiling stain. We replace the boot and collar, check the decking below for rot, and reseal the penetration. On West Hills roofs with flat sections, we also check the drain scuppers while we’re up there since a clogged scupper on a low-slope plane sends water sideways into the framing.
Trusted Brands We Service in West Hills
We install and repair shingle roofs from GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral. For West Hills homes inside the WUI zone, the brand matters less than the fire rating: Class A is the requirement, and not every shingle line qualifies. We stock common colors and accessory parts locally so a repair doesn’t stall waiting on a warehouse order from across the county. If your wood shake slope needs a Class A upgrade, we’ll walk you through which brands meet code and which ones make sense for a mid-century ranch’s look.
See the difference
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After
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AfterCommon Roof Repair Problems We See in West Hills Homes
- Ridge vents torn off by Santa Ana winds. Original ranch-era nailing often only grabs 3/8-inch CDX decking, not rafters. When wind gusts over 60 mph, the whole vent assembly lifts. Repairs here need fasteners into structural framing, not just a patch.
- Bald spots from marine-layer moisture on flat sections. Morning condensation sits on low-slope areas and traps granules, leading to premature wear around plumbing penetrations. A standard shingle-over doesn’t address the underlying moisture pattern.
- Wood shake patching blocked by WUI fire code. If your original wood shake roof has storm or branch damage, patching a few shakes may legally require re-roofing the entire slope with Class A material. We flag that before any work starts, and we don’t do work that an inspector can’t sign off on.
- Corroded chimney and skylight flashing from UV plus salt air. West Hills sits close enough to the coast that morning salt air lingers, and the summer sun is relentless. The combination eats standard alloy flashing fast. Re-flashing here means using materials built for this specific exposure.
Pricing for Roof Repair in West Hills, CA
A small leak repair on a West Hills ranch runs $350 to $700. Flashing replacement around a chimney or skylight lands between $500 and $1,200 depending on access and decking damage. Valley repairs run $700 to $1,800. Shingle replacement over a low-slope plane starts at $1,200 and can reach $2,800 if decking has rotted. When a wood shake repair triggers a WUI Class A upgrade, you’re looking at $6,000 to $12,000 for a full slope, not a patch. We give you a written line-item price before any work starts, and that price doesn’t change once we open the roof unless we find structural rot we could not have seen from the surface. Call (341) 217-2677 for a free estimate, and we’ll tell you what your specific roof needs and what it costs.
Written by Grant Whitlock, Owner at Mercer Roofing Co Woodland Hills, serving West Hills and the surrounding San Fernando Valley since 2000.
We Also Serve Cities Near West Hills
Beyond Roof Repair in West Hills, our crews cover Canoga Park, Woodland Hills, Winnetka, and Calabasas. If your home sits near the West Hills border and you’re not sure which team handles your street, call us and we’ll confirm it in under a minute.
Serving West Hills, CA - Our Local Coverage Area
We’re based in the West Hills 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 Repair in West Hills
Usually not. Because West Hills sits inside LA County’s Wildland-Urban Interface zone, any repair to a wood shake roof often requires upgrading the entire slope to Class A fire-rated materials. A patch that doesn’t meet WUI code won’t pass inspection and can create a problem with your insurer. Call (341) 217-2677 and we’ll tell you what the county will require before you spend a dollar.
Two reasons. First, West Hills low-slope sections pond water, which means decking rot around penetrations is more common and more extensive when we open the roof. Second, if any part of your roof is wood shake or non-Class A, the WUI code can push a small repair into a full slope re-roof. Woodland Hills sits outside the WUI boundary, so repairs there don’t carry that same mandate. Call (341) 217-2677 for an exact quote on your roof.
Yes, if it’s done right. We fasten ridge vents, flashing, and shingle edges into structural framing, not just the 3/8-inch CDX decking common on 1960s ranches. We also check nail patterns against manufacturer wind ratings for the shingles you have. If we find fasteners that won’t hold in a 60 mph gust, we replace them as part of the repair. Call (341) 217-2677 to schedule a free estimate.
No. The WUI code applies to the entire structure, including any attached or detached ADU. If the flat section over your ADU has decking damage or is non-Class A, the county can require the whole roof plane be brought up to code as part of the repair. We scope this before quoting so there are no surprises. Call (341) 217-2677 and we’ll check your roof against the current requirements.
Before we stage any materials or equipment, we confirm the location of your septic tank, leach field, and well head on the lot. We keep ladders, materials, and dump trailers off those setback zones. On open acreage, that often means a longer haul from the driveway to the structure, which we factor into the quote up front. It also means we schedule material drops for the same day work begins so nothing sits on your land. Call (341) 217-2677 and we’ll walk your lot before quoting.
When your roof leaks or the wind tears a vent loose, you want two things: a real person on the phone and a technician you can trust at the door. Mercer Roofing Co Woodland Hills gives you both. Call (341) 217-2677 for a free estimate on roof repair in West Hills, and we’ll send a background-checked, photo-badged technician with your written price in hand.