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
Fast, Reliable Roof Installation Across Chatsworth
Roof installation in Chatsworth runs from about $12,000 to $45,000 for a full replacement on most single-family homes, with ranch-style properties typically falling between $14,000 and $22,000 and larger equestrian estates or hillside builds pushing toward the upper end. We know Chatsworth because we work here constantly – from the Avenues off Santa Susana Pass Road to the newer hillside developments above the valley floor. Our crews understand what the Santa Ana winds do to a roof edge, how the summer sun bakes asphalt shingles on an exposed southwest slope, and what happens when a 1960s shake roof finally gives out underneath. Call (805) 309-3314 and you’ll get a real person who can talk through your roof before we ever step on the property.
Why Mercer Roofing Co Thousand Oaks Is Chatsworth’s Preferred Roof Installation Company
We’ve built our reputation in Chatsworth one roof at a time, and the pattern is consistent: homeowners here want to know who’s coming to their door before that door opens. Every Mercer technician is background-checked, identity-verified, and arrives in a clean, marked uniform with a photo ID badge. You get our technician’s name and photo before the visit. That’s the Threshold Standard, and we’ve been held to it since Mercer Roofing was founded in 2000 as part of the Threshold Group family.
Our Roof Installation team handles everything from a simple re-shingle on a 1950s ranch to full tear-offs on hillside estates with strict fire-code requirements. Chatsworth homeowners consistently tell us the same thing: the written price before work starts is what set us apart from other bids they received. No ambiguity, no change orders hidden in fine print. Just a price, in writing, before a single nail goes down.
Grant Whitlock leads our crews with a simple rule: if we wouldn’t install it on our own roof, we don’t install it on yours. That applies to decking we expose and find termite-damaged, to flashing details that fail in Santa Ana gusts, and to the underlayment choices that matter on a low-slope Chatsworth ranch.
Styles & brands we work with
Roof Flashing Installation in Chatsworth
Roof flashing installation in Chatsworth is the difference between a roof that sheds water for 30 years and one that leaks at the chimney, skylights, or wall intersections within 18 months. Flashing is the metal – usually galvanized steel, aluminum, or copper – that bridges the joints where your roof meets a vertical surface. In Chatsworth, chimneys are everywhere. Older ranch homes have original masonry chimneys, and hillside builds have stucco wall intersections that demand precise step flashing and counter-flashing. Getting this wrong means water follows the flashing into the wall cavity, and you won’t know until the drywall stains show up. A full flashing replacement integrated with a roof install typically adds $1,200 to $3,500 depending on chimney count, skylight penetration, and wall-line length.
Chimney and Skylight Penetration Flashing
Every chimney on a Chatsworth roof is a leak waiting for one bad flashing detail. We cut reglets into the mortar, install new counter-flashing, and seal with a high-grade urethane – not caulk from a tube. Skylights on 1970s and 1980s Chatsworth ranchers are particularly prone to failure at the curb flashing, where old aluminum has corroded from decades of intense sun exposure.
Wall-Line and Valley Flashing
Where a roof dies into an exterior wall – common on Chatsworth hillside additions – step flashing must tie into the wall’s weather barrier, not just tuck under the stucco. Valley flashing on intersecting roof planes carries more water volume than any other spot on the roof, especially during the brief but intense January downpours we see in the San Fernando Valley. We use 24-gauge minimum metal with a woven or open-metal valley detail depending on roof pitch.
TPO Roofing Installation in Chatsworth
TPO roofing installation in Chatsworth is the right call for low-slope and flat sections on the ranch homes and equestrian properties that dominate this part of the valley, especially where the pitch drops below 2:12 and shingles stop being reliable. TPO – thermoplastic polyolefin – is a white membrane welded at the seams with hot air, creating a single continuous waterproof surface that reflects heat instead of absorbing it. That matters in Chatsworth, where a summer afternoon can push attic temperatures past 140°F and a white TPO surface knocks 30 to 40 degrees off that load. A typical TPO installation on a Chatsworth home with a low-slope addition, patio cover, or detached shop runs $8 to $14 per square foot installed, including insulation board and full membrane adhesion.
Low-Slope Ranch Roof Sections
Many 1950s and 1960s Chatsworth ranch homes have one section – usually a patio roof, carport, or back addition – that was built too flat for shingles. If that section is below 2:12 pitch, shingles will leak guaranteed. We install mechanically fastened or fully adhered TPO over tapered insulation to create positive drainage, and the warranty on the membrane itself runs 15 to 30 years depending on the manufacturer and system.
Acreage Outbuildings and Shops
On Chatsworth equestrian properties, the house is only part of the equation. Detached barns, tack rooms, hay storage, and shop buildings often have flat or very low-slope roofs that get ignored until they leak onto feed or equipment. TPO is the standard choice for these structures because it handles standing water, holds up to valley heat, and installs efficiently over large open spans. The same material protects flat sections on hillside terraces where traditional shingles fail quickly.
Trusted Brands We Service in Chatsworth
We install and repair using manufacturer-recognized shingle brands, and on Chatsworth roofs we work most often with GAF, Atlas, and Tamko systems. Each has specific ratings for wind uplift and fire resistance that matter here, especially in the hillside zones where brush clearance and defensible-space requirements shape what your insurance will even accept. We carry common accessories for these brands on our trucks so we’re not making a second trip down the pass to Simi Valley or up to the valley floor for a ridge vent or starter strip order. When your roof gets torn off, the replacement material is specified line by line in your written quote before the dump trailer ever pulls up.
See the difference
Before
After
Before
After
Before
AfterCommon Roof Installation Problems We See in Chatsworth Homes
- Termite-compromised decking under old shake roofs. In the Avenues and along Santa Susana Pass Road, we regularly expose 1×6 board sheathing that termites have hollowed to paper thin. If the new shingle system goes over that without replacement, the nails won’t bite and the roof will fail at the first strong wind event. We budget for decking replacement in writing before any work starts.
- Drip edge and starter strip failures on long haul-in routes. Hillside lots on narrow, winding drives mean materials get boomed or hand-carried long distances. Cheap crews cut drip edge during transport and improvise with short pieces, which leaks at the eaves and rakes within a season or two. We inspect every piece before it goes on.
- Open-lot grading pushing water toward the foundation. On acreage properties, previous owners often changed the grade for a barn, arena, or driveway without thinking about roof runoff. That water hits the fascia, rots the soffit, and compromises the roof edge before the field itself fails. We look at drainage flow before quoting.
- Santa Ana wind damage to the northwest-facing roof plane. The wind loads in Chatsworth are real, especially in fall. Loose hip and ridge caps, under-driven fasteners from previous re-roofs, and improperly nailed starter courses all show up after the first big wind event. We install to the manufacturer’s high-wind spec on every exposed slope.
Pricing for Roof Installation in Chatsworth, CA
Most full roof installations in Chatsworth land between $12,000 and $45,000. A standard 1,400 to 1,800 square foot ranch with architectural shingles, new underlayment, drip edge, and standard flashing runs $14,000 to $22,000. Hillside homes with tile replacements and stricter wind and fire detailing push $30,000 and up. TPO flat sections add $8 to $14 per square foot for the membrane area. Flashing work, as noted, adds $1,200 to $3,500 depending on penetrations. What moves a Chatsworth quote: decking condition (termite damage in older homes is common), roof access (hillside lots with no crane access mean hand-loading), and whether the home is in a high-fire-severity zone requiring specific assembly ratings. We provide a written, line-item price before work starts, and we do not start without it. Call (805) 309-3314 to schedule a free estimate.
We Also Serve Cities Near Chatsworth
Mercer Roofing Co Thousand Oaks provides full Roof Installation in Chatsworth and the surrounding communities, including Canoga Park, West Hills, Calabasas, and Topanga. Each has its own housing patterns and wind exposure, but the standard is the same: written pricing, photo-badged technicians, and a 365-Day Done Right Promise on every job. If you’re near the Chatsworth border, call and we’ll confirm coverage in minutes.
Serving Chatsworth, CA - Our Local Coverage Area
We’re based in the Chatsworth 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 Installation in Chatsworth
Wood shake roofs are illegal to install as a replacement on new construction or re-roofs under current California fire codes, particularly in high-fire-severity zones like the Chatsworth hillside areas near the Santa Susana Pass. The reason is fire spread: shake ignites and carries embers far more readily than composite or asphalt materials. You can get the look back with composite shake products – brands like Brava and DaVinci replicate the appearance – or with architectural asphalt shingles that approximate the shadow lines of cedar. Mercer can show you both options side by side before you choose. Call (805) 309-3314 for a free estimate with composite shake and asphalt pricing both included.
Yes, and significantly. A detached ADU, barn, or shop on Chatsworth acreage means separate roof planes, separate drainage, and often a different material: TPO for low-slope outbuilding roofs, while the main house might take architectural shingle or tile. Each structure needs its own underlayment detail, its own flashing at the eaves and wall lines, and its own drainage discharge path. We scope every structure on the property during the estimate walkthrough, and our quote reflects each roof separately with line-item clarity. If you’re planning an ADU on your Chatsworth lot, call (805) 309-3314 and we’ll quote the roofing scope alongside the main house.
High-wind installation details determine whether a roof survives Chatsworth’s October and November Santa Ana events. The critical items are starter strip nails at 6-inch on-center spacing, not the cheap 12-inch patterns we find on older work; ring-shank nails for the field shingles on steep exposed slopes; adhesive underlayment over the full deck on high-wind and fire-zone exposures; and hip and ridge caps fastened with longer nails and sealant. We also inspect and reset the drip edge detail at the rake, where wind-driven rain gets behind loose fascia metal. Every Chatsworth roof we install on an exposed northwest or west-facing slope gets the manufacturer’s high-wind spec as a default, not an upcharge.
If the low-slope section is below 2:12 pitch, shingles will not perform and you need a membrane system, and in Chatsworth that system is TPO for most houses. Shingles rely on gravity to shed water, and when the pitch drops too low, wind-driven rain pushes uphill between the shingle courses. TPO eliminates that failure mode because it’s a continuous welded membrane, not overlapping pieces. We frequently see ranch homes where someone shingled a 1:12 carport or patio roof and it’s leaked for years. The fix is a TPO overlay with positive drainage, done right the first time. Call (805) 309-3314 if you want us to look at your low-slope section and tell you what it actually needs.
Often yes, and it depends on how the previous owner graded the lot. On hillside and acreage Chatsworth properties, we frequently see runoff from the roof discharge onto a slope that has no defined path to the street or a swale. Over time that water undermines bedding plants, seeps toward the foundation, and rots fascia and soffit material from the ground side up. The roof replacement itself may not be the problem, but if the drainage from the new roof is directed incorrectly, the new soffit and rake edges will fail prematurely. We evaluate discharge during the estimate and will not lay a roof over a drainage problem we can see. The fix is typically a downspout extension, a splash block relocation, or a small grading correction at the drip line, and we’ll quote it as a separate line item if it’s needed.
For a written, line-item roof installation quote on your Chatsworth home – including the decking inspection, flashing scope, and any drainage work – call Mercer Roofing Co Thousand Oaks at (805) 309-3314. A live person answers, day or night. Estimates are free, and the price we give you before work starts is the price you pay.
Written by Grant Whitlock, Owner at Mercer Roofing Co Thousand Oaks, serving Chatsworth.