Free roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Before
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Before
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AfterFast, Reliable Roofing Company Across Granada Hills
Roofing work in Granada Hills tends to move two ways: fast when it’s straightforward, and complicated the moment a permit lands on a 1960s wood shake roof inside the fire hazard zone. That’s the reality we work with every week. Mercer Roofing serves Granada Hills with written pricing before any work starts, background-checked technicians who badge at the door, and a 365-Day Done Right Promise on every repair. If you’re off Balboa or up near O’Melveny Park and need a straight answer about your roof, call (743) 200-8347.
We’re part of the Threshold Group family, founded in 2000, and every Mercer technician carries photo ID and arrives in a marked uniform. You’ll know exactly who’s walking up your driveway before they knock.
Why Mercer Roofing Is Granada Hills’s Preferred Roofing Company
Granada Hills homeowners call us because we treat a roof the way they’d want a neighbor to treat it. That means no vague hand-waving about “possible issues.” It means a written line-item price in your hands before a single shingle comes off. It means the person on your roof has been background-checked, identity-verified, and dispatched under the Threshold Verified standard, which each independently owned Mercer location is contractually held to.
We hear the same thing from homeowners off Rinaldi and around Joe Pellerin Field: they’ve had roofers who never showed, or showed in an unmarked truck, or gave a verbal number that doubled by week two. Our Roofing Company team works differently. You get a name, a photo, and a written guarantee before work begins. Reviews from Granada Hills customers consistently point to that as the reason they called us first and stopped shopping.
Response time to Granada Hills is scheduled around your availability, not ours. A live person answers the phone 24/7. No voicemail tree, no call-back form.
Residential Roofing in Granada Hills
Residential Roofing in Granada Hills usually means one of two jobs: a full reroof of a 1950s-to-1970s ranch, or a targeted repair on a roof that’s somewhere between fine and failing. The housing stock here is dominated by single-story tract homes with low-pitched gable roofs, originally finished in wood shake or 3-tab composition. That matters because low pitch changes how water moves, how flashing performs, and how much heat the decking absorbs.
A typical roof repair in Granada Hills runs $450 to $1,200 depending on what’s failed. A full asphalt shingle reroof on a standard 1,800-to-2,200 square foot ranch lands between $14,000 and $22,000. Tile and metal run higher. The number moves when we open the deck and find what the last owner never knew about. We’ll explain exactly how we handle that below, because in Granada Hills it’s not a rare surprise, it’s the norm.
What a reroof actually involves here
We strip the old material, inspect the decking sheet by sheet, replace what’s thermal-cycled or split, lay the underlayment, and set the new system to manufacturer spec. In the northern neighborhoods inside the Very High Fire Hazard Severity Zone, that system is almost always Class A composition, tile, or metal. The LA City permit requires it.
Why the 1994 Northridge wave matters to your roof
The Northridge earthquake, epicenter roughly 3 to 4 miles away in Reseda, triggered a concentrated reconstruction wave across Granada Hills. A large cohort of roofs went on between 1994 and 1998. Those roofs are now 25 to 30 years old, all aging out around the same time. If yours is in that window, a “small repair” call often turns out to be the beginning of a reroof conversation.
Roof Maintenance in Granada Hills
Roof Maintenance in Granada Hills is not optional. Summer highs above 100°F bake roofing materials in ways coastal Los Angeles never sees. Thermal cycling, the repeated expansion and contraction from scorching days to cool nights, cracks sealants and loosens fasteners. Add Santa Ana winds funneling through the Santa Susana Pass, and you get uplift that fails ridge caps and field shingles on low-slope rooflines faster than most homeowners expect.
Annual maintenance on a Granada Hills roof runs $350 to $650. That typically covers a full visual inspection, clearing debris from valleys and drains, resealing pipe boots and vents, and tightening or replacing fasteners. It’s the cheapest insurance you’ll buy on a system that costs $15,000 to replace.
What we check first
Flashing around chimneys, skylights, and sidewalls fails before shingles do. We check that first. Then we look at the valleys, where Granada Hills’s wind-blown debris collects and holds moisture against the underlayment.
When maintenance isn’t enough
If your roof was installed during the mid-1990s Northridge rebuild, maintenance may reveal brittle underlayment and failed flashing that no repair can save. We’ll show you photos, not feel a sales pitch. The decision is always yours, with written numbers in front of you.
Trusted Brands We Service in Granada Hills
We install and repair GAF, CertainTeed, Owens Corning, and Atlas systems regularly across Granada Hills, and we know which materials hold up best on low-pitched valley rooflines. GAF architectural shingles are a common choice for Class A reroofs in the fire zone, largely because they’re proven, available, and carry strong manufacturer warranties. We keep standard parts stocked for fast turnaround on Granada Hills repairs, so you’re not waiting on a distributor in Van Nuys when a ridge cap fails ahead of a Santa Ana.
We also work with IKO, Tamko, and Boral where the job calls for it. Our recommendation is always specific to your roof’s pitch, exposure, and fire-zone code status. We’ll never push a brand because it’s what the supplier had on sale.
Common Roofing Company Problems We See in Granada Hills Homes
- Grandfathered wood shake inside the fire zone. A homeowner calls for a patch job on a few damaged shakes. The moment an LA City permit is pulled, the patch becomes a mandatory full Class A reroof. The existing wood shake cannot legally be repaired in place.
- Mid-1990s Northridge cohort roofs aging out together. Roofs installed between 1994 and 1998 are now simultaneously hitting the 25-to-30-year mark. Underlayment is brittle, flashing is cracked, and the decking has been through three decades of Granada Hills heat.
- Thermal-cycled decking found only after tear-off. Contractors who bid without opening the deck leave the biggest cost variable unpriced. On a low-pitched 1960s ranch, the plywood under an old shake roof is often split beyond refastening and needs replacement.
- Santa Ana wind damage on ridge caps and field shingles. Wind funneling through the Santa Susana Pass creates uplift that fails improperly fastened roofing systems. Fasteners matter as much as materials here.
Pricing for Roofing Company in Granada Hills, CA
Expect a roof repair in Granada Hills to run $450 to $1,200. A full asphalt reroof on a standard ranch runs $14,000 to $22,000. Tile and metal systems run $22,000 to $35,000 or more depending on square footage and decking replacement. What moves the number fastest is what we find once the old roof comes off: rotted decking, out-of-date wiring behind the fascia, undersized framing from a mid-1990s rebuild. We write these as priced allowances in your contract and get your signed approval before we touch them. That way the number you see is the number you approve, not a surprise.
Call (743) 200-8347 for a free estimate. You’ll get a written price before any work starts, every time.
We Also Serve Cities Near Granada Hills
Our Granada Hills crews also cover San Fernando, Northridge, Porter Ranch, and Chatsworth. If you’re across the 118 or just south of the 5, the same Threshold Verified technicians and written pricing apply. Dispatch and scheduling are coordinated from the brand’s Los Angeles office; the crews work locally in your neighborhood.
Serving Granada Hills, CA - Our Local Coverage Area
We’re based in the Granada 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 Roofing Company in Granada Hills
If your home is inside the City of Los Angeles Very High Fire Hazard Severity Zone, which covers the northern Granada Hills neighborhoods backing up to the Santa Susana foothills and O’Melveny Park, the answer is almost always no. Current fire-zone code prohibits repairing non-Class-A wood shake in place once a permit is pulled. The repair becomes a full Class A reroof. We’ll confirm your home’s zone status before quoting anything, so you know where you stand. Call (743) 200-8347 for an exact assessment.
The 1994 Northridge earthquake triggered a reconstruction wave that put a concentrated cohort of roofs on Granada Hills homes between 1994 and 1998. Those roofs are now 25 to 30 years old, which is the typical service life of composition shingles and the underlayment beneath them. Add Granada Hills’s above-100°F summers and Santa Ana wind, and the timing isn’t a coincidence. It’s demography plus climate.
Outdated wiring, undersized or damaged framing, and failed waterproofing are the three we see most. On a low-pitched 1960s ranch off an O’Melveny Park-adjacent street, our tech tore off a grandfathered wood shake roof and found the decking had thermal-cycled and split beyond refastening. We replaced the bad sheets, laid ice and water shield in the valleys, and set new GAF architectural shingles with a starter strip. Because the home was mid-1990s Northridge reconstruction, we also found undersized framing and out-of-date wiring behind the fascia line. We documented each finding, wrote it as a priced allowance, and got the owner’s signed approval before touching a single board. That’s how every Mercer job in Granada Hills runs.
Yes. In the Very High Fire Hazard Severity Zone, LA City code requires Class A roofing material. That means composition shingles rated Class A, tile, or metal. You cannot reroof with wood shake or other non-Class-A materials. If your current roof is wood shake and you’re pulling a permit for any significant work, the new system must meet Class A fire-rating standards.
Look at what’s priced and what’s left as a “to be determined.” If one bid is $4,000 less but doesn’t include a decking allowance, it’s not cheaper, it’s incomplete. Ask both contractors what happens when the deck opens and they find rotted sheets. Ask if code upgrades are included. Ask for a written line-item breakdown. Then compare the actual scope, not the bottom line. Ours is always written, and any change order is priced and approved by you before work begins.
Written by Grant Whitlock, Owner at Mercer Roofing, serving Granada Hills as part of the Threshold Group family since 2000.