Metal roofing
Architectural shingles
Tile roofing
GAF
Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Trusted Roof Installation for Thousand Oaks Homeowners
A new roof in Thousand Oaks typically costs between $9,800 and $24,500 for a standard single-family home, with most full replacements landing between $13,000 and $19,000 depending on material, pitch, and square footage. We install shingle, tile, metal, and TPO systems across Thousand Oaks, and every job starts with a written price before any work begins. If you’re weighing repair against replacement, or you want a second opinion on an estimate you already received, call (805) 309-3314 and we’ll walk you through it in plain English.
Grant Whitlock leads our Thousand Oaks location, and he holds the whole team to one standard: the technician who shows up at your door is the same person whose name and photo we sent you before the visit. They arrive in a clean, marked uniform and present a photo ID badge before stepping inside. That is the Threshold Verified standard, and it is non-negotiable on every single job we run in Thousand Oaks. You will know who is on your property, you will have a written price in your hand before any nail is driven, and your installation is covered by the 365-Day Done Right Promise. If something is not right within a year, we come back and make it right.
We founded Mercer Roofing in 2000 as part of the Threshold Group family of home-service companies. Since then, the work has not changed much: roofs leak, sun beats down, Santa Ana winds rip shingles loose, and homeowners need a company that answers the phone and does what it said it would do. Our Thousand Oaks team handles full Roof Installation in Thousand Oaks from tear-off to final inspection, including permits and code compliance for Ventura County.
Shingle Roof
A Shingle Roof is the most common roofing system in Thousand Oaks, built from overlapping asphalt shingles laid over underlayment and decking, and it is the right choice when you want proven performance at a price that does not require a second mortgage. Asphalt shingle Roof Installation in Thousand Oaks generally runs $5.50 to $8.75 per square foot installed, which puts most full homes between $9,800 and $17,500 depending on tear-off, decking repair, and roof pitch. Mercer Roofing Co Thousand Oaks installs architectural and three-tab shingles from GAF, CertainTeed, and Owens Corning, and we include tear-off, underlayment, flashing, ridge cap, and haul-away in the written price you approve before work starts. A live person answers our phone 24/7, so if a storm tears a section loose at 2 a.m., you will talk to a human being, not a voicemail.
Architectural vs. Three-Tab
Architectural shingles are thicker, layered, and carry wind ratings up to 130 mph, which matters in Thousand Oaks when Santa Ana winds push through the canyons. Three-tab is the budget option, but it is thinner and more likely to tear in high wind. We will show you samples of both and quote the difference in writing.
What We Check Before Installing
Before a single shingle goes down, we inspect the decking for rot, check attic ventilation, and confirm the existing flashing is not reusable when it should not be. In Thousand Oaks, the summer heat can bake an under-ventilated attic to 140 degrees, and a new shingle roof with bad ventilation will fail early. We flag that before we quote, not after.
Styles & brands we work with
Standing Seam Metal Roof
A Standing Seam Metal Roof is a panelized metal roofing system with vertical seams that interlock above the water line, and it is the roof we recommend when homeowners in Thousand Oaks want to never think about their roof again. Standing seam installation in Thousand Oaks typically runs $14 to $22 per square foot installed, so a 2,000-square-foot roof lands between $28,000 and $44,000, and while that is a bigger check up front, the roof will often outlast the homeowner. Mercer Roofing Co Thousand Oaks installs standing seam with concealed fasteners, custom panel fabrication, and the same written-price guarantee we put on every job: the price on your quote is the price on your invoice, no change orders because we mis-measured.
Why the Fastener Matters
Exposed-fastener metal roofs use screws with rubber washers that degrade in the Thousand Oaks sun and eventually leak. Standing seam uses concealed clips, so there is no screw hole in the weather surface at all. If you have priced exposed-fastener metal and standing seam side by side, we will explain the difference in labor and materials honestly, then let you choose.
Fire and Wind Performance
Metal is Class A fire rated and laughs at the embers that worry homeowners near open space in the Santa Monica Mountains. It also sheds Santa Ana wind better than any shingle. For homes in Thousand Oaks neighborhoods like Sunset Hills or Lynn Ranch, we see metal chosen as often for fire safety as for longevity.
Tile Roof
A Tile Roof is a roofing system made from concrete or clay tiles laid over a reinforced underlayment, and it is the classic look on Thousand Oaks homes built from the 1970s through the 1990s, particularly in Spanish-style and Mediterranean tracts. Tile roof installation in Thousand Oaks runs $12 to $19 per square foot installed for concrete tile, with clay tile running higher at $16 to $25 per square foot, so a full replacement on a 2,000-square-foot home lands between $24,000 and $50,000. Mercer Roofing Co Thousand Oaks does full Oak Park Roof Installation tear-offs and re-roofs too, and we match existing tile profiles so your new roof does not look like a patch job. Every tile job includes a written price and the 365-Day Done Right Promise.
The Underlayment Is the Real Roof
Tile sheds water, but the underlayment underneath is what actually keeps your home dry. On many 30-year-old tile roofs in Thousand Oaks, the tile is fine and the underlayment is failing. We show you photos from the tear-off so you can see exactly what failed and why, then write the quote based on that condition, not a guess.
Walking on Tile Without Breaking It
Tile is fragile, and an inexperienced crew can break dozens of tiles during tear-off or while walking the roof. Our crew uses tile boards and proper walk paths, and we replace any tile that cracks during our work at no charge. You should not pay for our footwork.
Roof Ventilation
Roof Ventilation is the balanced system of intake and exhaust airflow through your attic that regulates temperature and moisture, and it is the silent factor that determines whether a Thousand Oaks roof lasts 12 years or 30. Ventilation work as part of a roof installation typically adds $800 to $2,400 depending on the number of vents, ridge length, and whether you need a solar-powered attic fan. Mercer Roofing Co Thousand Oaks includes a ventilation assessment with every roof installation quote, because in our climate, a new roof without proper ventilation is a roof being cooked from below. We size intake and exhaust using the 1:150 rule as a baseline, then adjust for your home’s specific attic volume and roof configuration.
Intake vs. Exhaust Balance
Thousand Oaks attics need roughly equal intake (soffit vents) and exhaust (ridge vent, box vents, or turbine). When one side is short, the attic pulls air from inside your house, which raises your AC bill. We check what you have before we quote, and we do not sell ventilation you do not need.
Signs Your Current Ventilation Failed
If your upstairs rooms are 10 degrees hotter than downstairs in August, or if you see rust on the underside of your roof decking, your ventilation is not working. In Thousand Oaks, where summer attic temps regularly hit 140 degrees, that heat backs up into the living space and shortens your shingle life. We will tell you what a fix costs, in writing, before we touch anything.
Roof Flashing Installation
Roof Flashing Installation is the process of installing the metal pieces that seal the joints where your roof meets a wall, chimney, skylight, valley, or pipe, and it is the single most common source of roof leaks. Flashing work during a roof installation is usually included in the quote, but standalone flashing repair or replacement in Thousand Oaks typically runs $350 to $1,200 per penetration depending on accessibility and whether the flashing is standard or custom-fabricated. Mercer Roofing Co Thousand Oaks does not reuse old flashing on a new roof. We install new flashing at every penetration, every valley, every wall intersection, and every chimney, because flashing that is 20 years old has already given you all it has.
Step Flashing at Wall Intersections
Where a roof slope meets a vertical wall, the correct detail is step flashing: individual L-shaped pieces woven into each course of shingles. When a roof in Thousand Oaks leaks at the wall line, it is almost always because someone used continuous flashing or caulk instead. We cut and bend step flashing on site.
Chimney and Skylight Flashing
Chimney flashing should include both base flashing and counter-flashing set into the mortar, and skylights should have manufacturer-matched flashing kits, not field-bent generic metal. We inspect both on every roof installation, and if the existing chimney cricket is inadequate, we build one. Water should never pool behind a chimney on a roof we install.
TPO Roofing Installation
TPO Roofing Installation is the installation of a white, heat-reflective single-ply membrane, and it is the standard choice for flat and low-slope roofs on Thousand Oaks additions, garages, and commercial buildings. TPO installation in Thousand Oaks runs $7 to $12 per square foot installed, so a typical 1,000-square-foot flat roof lands between $7,000 and $12,000. Mercer Roofing Co Thousand Oaks installs TPO with hot-air welded seams, which are stronger than the membrane itself when done correctly. We use TPO from GAF and other recognized manufacturers, and the written price you approve includes all insulation board, cover board, membrane, flashing, and termination details.
Why White Membrane in Thousand Oaks
TPO is white for a reason: it reflects solar energy and lowers cooling load. On a flat Thousand Oaks roof with full sun exposure, a dark roof surface can hit 160 degrees in July. TPO runs 30 to 40 degrees cooler, which means a cooler room below and less strain on your AC.
Seam Welding vs. Adhesive
The weak point of any TPO roof is the seams. We hot-air weld every seam and every penetration boot, then probe each seam with a rounded tool to confirm the weld. If a seam is not fully fused, it is redone before we leave. That is the difference between a roof that lasts 25 years and a roof that fails at year three.
Brands We Service
We install GAF shingle systems, and we are a GAF-certified installer in Thousand Oaks, which means we have factory training on their Timberline line and can offer their enhanced wind warranty. GAF’s Timberline HDZ is the shingle we recommend most often for Thousand Oaks homes because of its LayerLock nailing strip and 130 mph wind rating.
We also install CertainTeed Landmark and Atlas Pinnacle shingles, plus Tamko Heritage when homeowners want a specific color or profile. Whether you have GAF on the roof now or are considering a CertainTeed replacement, we will quote the exact same system with the same workmanship warranty. Call us for a written estimate on any shingle brand we carry, and we’ll help you compare what you are actually paying for.
See the difference
Before
After
Before
After
Before
AfterSigns You Need a Pro Right Now
- Granules in your gutter. Asphalt shingles shed granules when they are nearing the end of their life, and finding a steady accumulation in your Thousand Oaks gutters after rain means the protective top layer is failing. Once granule loss is visible, the shingles are not long for this world, and replacement will cost less than a leak that rots decking.
- Daylight visible in the attic. If you can see sunlight through the roof deck from inside your attic, water can get in. In Thousand Oaks, this is common on older homes in the Conejo Valley where roofs have outlived their 25-year shingle rating.
- Curling or lifting shingle edges. Shingles that curl up along the edges have lost their adhesive bond, and Santa Ana winds will peel them off like pages from a book. Once shingles start lifting, the roof is in active failure mode.
- A sagging roofline. A visible dip or sag in the ridge line or between rafters means the decking or structural framing has been compromised by water. This is not a repair-and-wait situation; the structure needs to be assessed before another wet winter.
- Leaks that come back after repair. If you have patched the same leak twice, the problem is probably larger than the patch: failed flashing, rotted decking, or an underlayment that is done. A new roof with new flashing is often the cheaper move in year three of repeated repairs.
Our Process, Step by Step
- 1
The visit and the number. You call (805) 309-3314. We schedule a time, and before the technician arrives, you receive their name and photo. When they knock, they present a photo ID badge. They walk the roof, take measurements and photos, and inspect the attic. You get a written quote, not a verbal number.
- 2
The inspection findings, in your hands. We show you photos of what we found: worn shingles, failed flashing, soft decking, ventilation shortfalls. You decide what gets fixed. The written scope of work is itemized, and the price on that scope is the price we hold.
- 3
Permit and materials. We pull the permit through the City of Thousand Oaks Building and Safety Division, and we order materials from our supply partners in Ventura County. You do not chase paperwork. We handle the permit, the inspection scheduling, and the final sign-off.
- 4
Installation day. The crew arrives in marked vehicles and uniformed shirts. Tear-off is done with tarps and magnetic sweepers to catch old nails. The new system goes down in the order it should: underlayment, flashing, then the finished surface. We do not leave a bare roof exposed overnight unless the forecast is clear and the area is protected.
- 5
Walkthrough and the written guarantee. After the final inspection passes, we walk the property with you, show you the finished roof from the ground, and hand you the written 365-Day Done Right Promise. If anything is not right within a year, you call, and we come back. That is the whole deal.
How Much Does Roof Installation Cost in Thousand Oaks?
A full Roof Installation - Westlake Village runs between $9,800 and $50,000 depending on what you choose. The most common scenario, a 2,000-square-foot shingle roof with tear-off and standard underlayment, lands between $13,000 and $17,500. Tile on the same house runs $24,000 to $38,000. Standing seam metal lands between $28,000 and $44,000. TPO for a flat section or addition runs $7,000 to $12,000 per 1,000 square feet.
The big factors that move the price are roof pitch, number of penetrations, decking condition, and whether you need ventilation or flashing upgrades along the way. A steep roof on a Thousand Oaks hillside home costs more because it is slower and safer to do with staging. Soft decking from years of slow leaks adds $3 to $5 per square foot for replacement plywood or OSB. We show you these numbers as line items before you sign, so nothing on the invoice is a surprise.
The best way to avoid overpaying is to get three written quotes and compare scope, not just bottom line. A quote that is $3,000 cheaper probably omitted underlayment, flashing, or ventilation. Our free estimate includes a full scope of work in writing, with materials called out by brand and thickness. You can compare ours line by line against any other quote in Thousand Oaks, and we will answer questions about the differences honestly.
Our Service Area Near Thousand Oaks
Mercer Roofing Co Thousand Oaks serves Thousand Oaks and the surrounding communities of Roof Installation in Camarillo, Westlake Village, Oak Park, Agoura Hills, and Simi Valley. Most estimates are scheduled within one to three business days, and because we dispatch from Thousand Oaks, we can often see homes in Roof Installation in Moorpark and the Santa Rosa Valley the same week you call. If you are in Malibu, Calabasas, or Topanga, we make the drive and we bring the same written price and photo-badged technician standard with us.
Serving Thousand Oaks, CA - Our Local Coverage Area
We’re based in the Thousand Oaks area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
Frequently Asked Questions About Roof Installation in Thousand Oaks
Roof installation is the process of removing the existing roof system down to the decking (or replacing the decking if needed) and installing a new roofing system: underlayment, flashing, ventilation, and the finished surface material. In Thousand Oaks, most full installations take 3 to 7 days for shingle roofs and 5 to 10 days for tile or metal. At Mercer Roofing Co Thousand Oaks, every full Agoura Hills Roof Installation includes a written scope of work, a written price, and the 365-Day Done Right Promise.
A typical shingle roof installation in Thousand Oaks takes 3 to 5 working days including tear-off, decking inspection, installation, and cleanup. Tile and standing seam metal run 5 to 10 working days depending on the roof’s complexity and the weather. We give you a start window in writing and tell you the day we expect to finish before we begin.
Most full roof installations in Thousand Oaks run between $13,000 and $19,000 for shingle, $24,000 to $38,000 for tile, and $28,000 to $44,000 for standing seam metal. Flat or low-slope TPO sections run $7,000 to $12,000 per 1,000 square feet. The exact number depends on roof size, pitch, decking condition, and material choice, and you get the exact number in writing before work starts. Call (805) 309-3314 to schedule a free estimate.
Yes, we install GAF, CertainTeed, Owens Corning, Atlas, Tamko, and other major shingle brands. We are a GAF-certified installer in Thousand Oaks, which means we have factory training on GAF’s Timberline line and can offer their enhanced wind warranty. If you have a specific brand or color you want, tell us and we will quote it exactly.
Roof installation is not an emergency service, but a roof that is actively leaking is an emergency, and we answer the phone 24/7. If water is coming into your Thousand Oaks home, call (805) 309-3314 any hour, any day. We will get a technician to assess the damage, tarp it if needed, and schedule the right repair or replacement so you are not living under buckets.
Every roof installation from Mercer Roofing Co Thousand Oaks carries the 365-Day Done Right Promise: if anything is not right within one year of installation, we come back and make it right at no charge. Material warranties vary by manufacturer, typically 30 to 50 years on architectural shingles, and we register your warranty with the manufacturer on your behalf. Your written guarantee is included with every job, never conditional on a future purchase.
Move vehicles out of the driveway and garage on the days of tear-off, because our crew will be running tarps and a dump trailer. Remove loose items from walls and shelves that vibrate, particularly on single-story homes where the hammering transfers inside. We handle the rest: protection for your landscaping, daily cleanup, and a magnetic sweep for nails at the end of every day.
Schedule Your Roof Installation Service in Thousand Oaks Today
A new roof is a big check, and you should know exactly what it costs and who is doing the work before you spend a dollar. Call (805) 309-3314 or stop by our home page to schedule a free, written estimate. A live person answers 24/7, the technician who visits will send their name and photo ahead, and the price you are quoted is the price you will pay. That is how we have done it in Thousand Oaks since 2000, and it is how we will do it on your roof.
Written by Grant Whitlock, Owner at Mercer Roofing Co Thousand Oaks, serving Thousand Oaks since 2000.