Metal roofing
Architectural shingles
Tile roofing
GAF
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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 Simi Valley
Roof repair in Simi Valley typically runs $350 – $1,100 for most standard fixes, with larger decking or WUI-compliance work ranging $1,800 – $4,500 depending on scope. We respond to Simi Valley homes within two business days on average, and we write the price down before anyone climbs a ladder. If you’re dealing with a leak near the foothills off Erringer Road or wind damage after a Santa Ana event, call us at (559) 249-4917 for a straight answer and a free estimate.
We know Simi Valley roofs because we work on them year-round. The wind patterns east of the 118, the older tract homes with original 1980s decking, the cedar shake teardowns in the WUI zones west of Yosemite Avenue. This isn’t generic roofing. It’s a specific housing stock, a specific climate, and a specific set of code requirements that most contractors only understand after they’ve already quoted the job. We price it right the first time because we’ve seen your roof before we’ve seen your house.
Why Crestview Roofing Co Ventura Is Simi Valley’s Preferred Roof Repair Company
Our Roof Repair team works across Simi Valley every week, from the ranch homes north of Los Angeles Avenue to the newer subdivisions east of First Street. What separates us isn’t a clever tagline. It’s a process. Before any repair, you get a written price. Before we arrive, you get a live arrival time and the name of the technician walking up your driveway. After the work, you get before-and-after photos and a digital invoice sent to your phone. That’s The Relay Standard, and it applies to every job we do in Simi Valley.
Dylan Pace leads Crestview Roofing Co Ventura, and he built the company in 2000 around a simple idea: roofing shouldn’t feel like a gamble. The 365-Day Done Right Promise backs every repair. If it fails within a year, we return and fix it at no charge. No negotiation, no runaround. That’s in writing, included with every job we do in Simi Valley.
Simi Valley homeowners call us because we explain the trade terms in plain English. Flashing is the metal strips that seal joints around chimneys and vents. Drip edge is the metal flashing along the roof perimeter that keeps wind-driven rain from soaking the fascia. Decking is the plywood layer under your shingles. If you don’t know what’s failing, you can’t price it fairly. We make sure you know before you pay.
Styles & brands we work with






Metal Roof Repair in Simi Valley
Metal Roof Repair in Simi Valley usually involves resealing or replacing fasteners, patching punctures around vents and pipe boots, or correcting oil-canning from thermal movement on older standing seam panels. Most homeowners in the eastern foothills call us after a Santa Ana wind exposes loose fasteners or tears a panel edge near the ridge. A standard fastener reseal runs $350 – $475; a panel replacement or seam repair ranges $600 – $1,100 depending on panel profile and access.
Standing seam seam repair
Wind-driven rain gets under standing seam panels when the seam clamps loosen. We re-crimp and reseal the seam, then replace any fasteners that have backed out. On WUI properties in the foothills, we also check that panel gaps don’t exceed ember-intrusion limits.
Metal roof penetration sealing
Pipe boots and vent collars on metal roofs fail with UV exposure. We replace the boot, apply a new sealant collar, and confirm the flashing still drains. A single penetration reseal on a Simi Valley metal roof typically runs $175 – $275; if decking beneath has rotted, we quote that separately and in writing before touching it.
Commercial Roof Repair in Simi Valley
Commercial Roof Repair in Simi Valley focuses on low-slope and flat roof systems common on the retail and warehouse buildings along Cochran Street and the industrial parks east of Tapo Canyon Road. We inspect seams, drains, and pitch pockets, then price repairs per penetration or per linear foot of seam failure. A typical repair scope on a flat commercial roof runs $1,200 – $3,800, depending on membrane type and the extent of water intrusion into the insulation.
Flat roof patching and seam repair
TPO and modified bitumen roofs split at seams over time. We patch split seams, reinforce corners, and reset any failed drain boots. On flat roofs, standing water accelerates failure, so we also verify drainage is moving water off the roof rather than pooling over the repair.
Commercial code-readiness inspections
Many commercial property owners in Simi Valley need a repair scope that satisfies both tenant maintenance obligations and fire code reviews. We document every repair with photos and itemized pricing, which helps when a property sale or lender inspection turns up roof conditions in the report.
Trusted Brands We Service in Simi Valley
We install and repair using manufacturer-backed materials from GAF, CertainTeed, and Owens Corning, along with Tamko and Boral where the roof spec calls for it. That matters in Simi Valley because the same repair quoted with a no-name shingle versus a CertainTeed Landmark or Owens Corning Duration changes both the warranty and the wind rating. We keep common profiles and matching ridge caps in local supplier stock, so the repair doesn’t sit for three weeks waiting on a special order. If you’re matching an existing roof on a 1990s tract home north of the 118, we can usually source a color match within a week.
Common Roof Repair Problems We See in Simi Valley Homes
- Missing or damaged drip edge. Simi Valley homes built before the late 1990s often have either no drip edge or rusted galvanized edging along the eaves. Wind-driven rain soaks the fascia, then rot spreads under the first course of shingles. We replace the drip edge with aluminum and re-lay the starter strip, typically $8 – $14 per linear foot installed.
- Failed flashing at valleys and penetrations. Valley metal cracks and pipe flashings lose their seal after 20 – 30 years of Simi Valley heat and Santa Ana cycles. Leaks travel under the shingles and delaminate the decking before you ever see a ceiling stain. Replacing valley flashing runs $450 – $850 on a standard single-story ranch.
- Wind-torn composition shingles from 60+ mph gusts. Older roofs nailed with four nails per shingle lose tabs during strong fall wind events. We see entire slopes stripped along the northern foothills. A high-wind repair re-nails and seals the exposed area with a six-nail pattern and hand-tabbed adhesive.
- Cedar shake teardowns in the foothills. The corridor east of the 118 and north of Alamo Street has a high concentration of cedar shake roofs. Many are now non-compliant with WUI codes. We replace them with Class A composite or tile, a job that runs $22,000 – $45,000 on a full tear-off depending on roof size and material.
See the difference
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After
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AfterPricing for Roof Repair in Simi Valley, CA
Here’s what Simi Valley homeowners actually pay us. A minor leak repair at a pipe boot or vent stack runs $350 – $550. Flashing replacement at a chimney or valley runs $450 – $900. Decking replacement adds $65 – $95 per 4×8 sheet, and WUI compliance upgrades like ember-resistant vents or Class A shingles add $1,200 – $3,200 on top of the base repair. The price we write before work starts is the price on the invoice. If the scope changes, we price the change in writing and get your approval before touching it. Call (559) 249-4917 for an exact quote; estimates are free.
We Also Serve Cities Near Simi Valley
Our Simi Valley crews also cover Moorpark, Newbury Park, Fillmore, and Somis. If you’re in a neighboring community and need the same written-price, photo-documented repair process, call (559) 249-4917 and ask about Roof Repair in Simi Valley service extending to your area.
Serving Simi Valley, CA - Our Local Coverage Area
We’re based in the Simi Valley 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 Simi Valley
If your home is in a Wildland-Urban Interface zone, any repair that touches the roof covering or decking must use Class A fire-rated materials and ember-resistant details like enclosed eaves and metal valley flashing. A simple shingle patch becomes a code-driven upgrade. We scope the WUI requirements during inspection and write them into your estimate before work starts. Call (559) 249-4917 to find out if your address falls in a WUI zone.
We can’t know for sure until we lift the shingles, but we can tell you the probability by looking at the roof’s age, the condition of the drip edge, and whether you’ve had prior leaks. Most Simi Valley homes built in the 1970s and 1980s have 3/8-inch plywood decking that delaminates after one or two leak events. We price decking replacement as a per-sheet line item in your original estimate, so if it’s needed, the price is already written down and approved.
No. A standard ridge vent doesn’t block embers. Wildfire safety in Simi Valley requires ember-resistant vent designs, typically with fine-mesh screening. We install those when a repair touches the ridge or when a WUI inspection flags an open vent. A standard ridge vent replacement runs $350 – $600; an ember-resistant upgrade is about $150 – $300 more per vent run.
Accept nothing below ASTM D7158 Class H (150 mph). Simi Valley regularly sees Santa Ana gusts over 60 mph, and the foothills catch stronger bursts. Owens Corning Duration and CertainTeed Landmark architectural shingles both carry Class H ratings when installed with six nails per shingle. A Class F (110 mph) shingle is not enough for the eastern corridor.
Because cedar shake no longer meets Simi Valley’s WUI fire codes for homes bordering open space. Insurance carriers in the high-fire zones are also requiring Class A roof coverings as a condition of renewal. We see it constantly in the neighborhoods off Erringer Road and north of Alamo Street. The teardown runs $22,000 – $45,000 for a full replacement, but the insurance pressure and fire risk make it a now-or-later proposition.
Call Crestview Roofing Co Ventura for Roof Repair in Simi Valley
If your Simi Valley roof is leaking, torn, or failing a WUI inspection, call (559) 249-4917. We’ll give you a written price before work starts, a live arrival time, and before-and-after photos so you can see exactly what we did. No surprises at the door. No arguments after the job. Just a roof done right, in writing.
Written by Dylan Pace, Owner at Crestview Roofing Co Ventura, serving Simi Valley with written-price roof repair and replacement.