Free roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
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AfterFast, Reliable Roofing Company Across Simi Valley
If you’re searching for a roofing company in Simi Valley that actually shows up, puts the price in writing before work begins, and stands behind the job for a full year, you’re in the right place. Brennan Roofing serves homeowners across Simi Valley, from Wood Ranch and Big Sky to the older tract neighborhoods east of the 118. We know what these roofs deal with: decades of thermal cycling, Santa Ana wind events, and thousands of original wood-shake assemblies that no longer meet the city’s Class A fire requirement. Call (361) 320-9467 for a free estimate and a written price you can hold us to.
Why Brennan Roofing Is Simi Valley’s Preferred Roofing Company
Simi Valley homeowners have dealt with enough roofers who no-show or change the number at the door. That’s exactly why we operate under The Garrison Standard: every job gets a written price before any work starts, every technician is background-checked and arrives in uniform, and every repair or installation carries the 365-Day Done Right Promise in writing. If something fails within a year, we come back and fix it at no charge. No fine print, no phone tag.
The local knowledge matters here more than most cities. Simi Valley’s housing stock skews heavily toward ranch-style and two-story tract homes built between 1960 and 1985, which means we see specific failure patterns repeat block after block. Spaced sheathing, exhausted underlayment, valley flashing that’s been patched instead of replaced. Travis Oakley, who runs our Simi Valley roofing operation, has walked hundreds of these roofs and writes quotes that account for what’s actually underneath the shingles, not just what shows from the ground. Our Roofing Company team carries that same standard on every job, from a small leak repair off Erringer Road to a full tear-off in Wood Ranch.
Roofing Contractor in Simi Valley
A roofing contractor in Simi Valley does more than nail shingles down. The job starts with opening up a section of the roof to see what’s actually there: what kind of sheathing, what shape the underlayment is in, whether the flashing was ever installed correctly. On a 1972 ranch in Wood Ranch, we peeled back a few courses after a Santa Ana wind event and found original spaced sheathing, 40-year-old underlayment, and no ice and water shield at the valleys. That changes the scope of work, and we wrote it into the contract as a line item before anyone ordered material.
Inspection Before Estimate
We don’t quote blind. A roofing contractor in Simi Valley who gives you a number without opening the roof is guessing. Our process includes a physical inspection of the decking, flashing, and penetrations so the written price reflects what the job actually requires.
Written Scope, No Door-Price Drift
The price goes on paper before work starts, and it doesn’t move at the door. If we find hidden damage during tear-off, we show you, we explain it in plain English, and we get written approval before proceeding. That’s The Garrison Code, and it’s non-negotiable.
Commercial Roofing in Simi Valley
Commercial roofing in Simi Valley has to handle the same wind and ember exposure as residential work, just across larger spans and heavier foot traffic. We handle flat and low-slope commercial roofs throughout the industrial pockets along Easy Street and the retail corridors off First Street, where ponding water and failed torch-down seams are the usual culprits. A commercial roof in this climate needs a drainage plan, not just a membrane slapped over the old one.
Low-Slope Inspections
For commercial buildings, we inspect the drainage, the seams, and the perimeter flashing before recommending a repair or replacement. Simi Valley’s dry heat bakes low-slope membranes hard, and the Santa Anas pull at edge metal. An inspection catches small separations before they become interior leaks.
Repair Versus Replacement
Sometimes a commercial roof needs a targeted repair, sometimes it’s reached the end of its service life. We’ll tell you which one you actually have and put the recommendation in writing with a fixed price. No change orders unless you approve them first.
Trusted Brands We Service in Simi Valley
We install and service roofing materials from GAF, Atlas, and Boral, among other leading manufacturer lines, and we know which products hold up in Simi Valley’s specific conditions. A GAF Class A assembly with the right nail pattern handles the wind uplift through the Santa Susana Pass; a Boral tile roof resists the ember intrusion that wood shake simply can’t. If you have a specific shingle or tile line in mind, we’ll walk you through the trade-offs plainly, including how each product meets the city’s Class A assembly requirement, so you can choose with confidence before we order anything.
Common Roofing Company Problems We See in Simi Valley Homes
- End-of-life wood shake with Class B fire ratings. Thousands of original 1960s and 1970s tract homes in Simi Valley still have wood-shake roofs that no longer meet the 2008 Building Code’s Class A assembly requirement. A like-for-like shake swap isn’t permitted, so homeowners must choose between fire-retardant shake, tile, or composite.
- Wind damage from Santa Ana events through the Santa Susana Pass. Ridge caps and shake courses end up scattered across lawns in neighborhoods like Wood Ranch after a strong wind event. The assembly has to be nailed and detailed to resist uplift, not just pass the fire test.
- Spaced sheathing and failed underlayment on older tract homes. Many original Simi Valley roofs were built with spaced sheathing and underlayment that’s now 40 – 50 years old. A roof-over looks cheaper until the old decking disintegrates under it; a full tear-off with sheathing upgrades is usually the honest fix.
- No ice and water shield at valleys and penetrations. Even in a dry climate, valley intersections and pipe penetrations need proper underlayment protection. We find roofs all over Simi Valley that never had it installed, and the leaks show up exactly where you’d expect.
Pricing for Roofing Company in Simi Valley, CA
A full tear-off and reroof on a typical Simi Valley ranch home runs from $12,000 to $22,000 depending on square footage, sheathing condition, and the material you choose. A Class A composite or tile retrofit sits at the higher end; a GAF architectural shingle assembly with full sheathing replacement falls in the middle. Targeted roof repairs in Simi Valley generally run $450 to $1,800, and a standalone roof inspection with a written report costs $250 to $400. We give you the number on paper before any work starts, with any unexpected conditions written as allowances in the contract. Call (361) 320-9467 for a free estimate on your specific roof.
We Also Serve Cities Near Simi Valley
Brennan Roofing serves Simi Valley and the surrounding communities, including Moorpark, Oak Park, Thousand Oaks, and Westlake Village. If you’re nearby and need a roofing contractor who writes the price before starting, call us at (361) 320-9467. Our crews work throughout the Conejo Valley corridor.
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 Roofing Company in Simi Valley
Simi Valley enforces the 2008 Building Code’s Class A assembly requirement for all reroofs, which means the thousands of original 1960s and 1970s wood-shake roofs must be upgraded to a fire-rated assembly. Fire-retardant shake, tile, or composite are your options; a straight like-for-like shake swap cannot be permitted. Call (361) 320-9467 and we’ll walk you through the compliant options for your home.
It depends on what the sheathing and underlayment look like once we open the roof, but scattered ridge caps and shake courses often sit atop failing wood shake that’s already past its service life. We inspect first, write the scope in plain language, and put the price on paper before any work starts. Call (361) 320-9467 for a free inspection.
Yes, and that’s why we write allowances into the contract instead of hoping for the best. If spaced sheathing needs upgrading or old underlayment has to come out, you’ll see that cost as a line item you approve in writing before we proceed. No door-price drift, ever.
We install and service leading manufacturer lines including GAF, Atlas, and Boral, and we carry the materials needed for Simi Valley’s Class A assembly requirement. We’ll explain the trade-offs between shingle, tile, and composite options in plain English so you can choose with confidence. Call (361) 320-9467 to discuss your roof.
Yes, and we recommend it at valleys, eaves, and penetrations regardless of climate. Simi Valley’s hot, dry summers and Santa Ana wind events stress flashing and underlayment at exactly those points, and ice and water shield prevents leaks that thermal cycling eventually causes. We’ll show you where it belongs on your roof during the estimate.
If you’re tired of roofers who don’t show up or change the price at the door, call Brennan Roofing at (361) 320-9467 to schedule your free estimate. We serve all of Simi Valley, from the hillside homes above Sycamore Canyon to the older tracts along Los Angeles Avenue. The price goes in writing before any work starts, and the 365-Day Done Right Promise backs every job for a full year.
Written by Travis Oakley, Owner at Brennan Roofing, serving Simi Valley and the surrounding communities with written pricing and the 365-Day Done Right Promise.