Free roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Before
After
Before
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Before
AfterFast, Reliable Roof Installation Across Santa Clara
Roof installation in Santa Clara usually means a full tear-off, not a patch. Most homes here were built between 1950 and 1975, and their original wood shake or early composition shingle roofs are now 40 to 60 years old, failing at the same time. When you call Mercer Roofing at (743) 200-8347, you’ll get a live person, a written price before any work starts, and a technician whose name and photo arrive on your phone before they do.
Why Mercer Roofing Is Santa Clara’s Preferred Roof Installation Company
We’ve torn off and rebuilt roofs in Santa Clara’s older ranch neighborhoods long enough to know exactly what’s behind the decking on a 1963 low-slope home off the University corridor or a 1972 condo complex near Central Park. Our Roof Installation team works the way Santa Clara homeowners want: a written price before the first nail, a photo ID badge at the door, and a 365-Day Done Right Promise on every job.
Grant Whitlock leads our crews with a simple rule: if the roof isn’t right within a year, we make it right. That’s not marketing language. It’s a written guarantee included with every installation. Santa Clara customers also get what few roofers offer: the technician’s name and photo sent before arrival, so you never open the door to a stranger. Every Mercer technician is background-checked, identity-verified, badged, and uniformed under the Threshold Verified standard.
Founded in 2000, Mercer Roofing is part of the Threshold Group family of home-service companies. Our Bay Area office coordinates dispatch and scheduling for Santa Clara, and our crews know this city’s roof assemblies, its permit process, and its code requirements.
TPO Roofing Installation in Santa Clara
TPO Roofing Installation in Santa Clara is the standard solution for the city’s many 1970s and 1980s condominium complexes and commercial tilt-ups with low-slope or flat roofs. TPO, or thermoplastic polyolefin, is a heat-welded single-ply membrane that reflects UV instead of absorbing it, which matters in a city where summer temperatures regularly reach the mid-90s and sun exposure is more intense than in coastal Bay Area cities.
What the job involves
A typical TPO installation on a Santa Clara flat roof includes tear-off and disposal of the old membrane, inspection of the underlying decking and insulation, and installation of new underlayment, insulation board, and the TPO membrane itself. We heat-weld the seams, flash all penetrations and parapet walls, and tie the membrane into existing drainage. The result is a roof system designed to shed water, not hold it.
What it costs
A TPO installation on a Santa Clara HOA condominium building or commercial flat roof typically runs $3,800 to $6,900 for a smaller 1,200 to 2,000 square foot roof, and $8,500 to $14,500 for larger buildings of 2,500 to 4,500 square feet. Every TPO job begins with a written line-item price. No work starts until you approve it in writing, and the 365-Day Done Right Promise applies in full.
Shingle Roof in Santa Clara
Shingle Roof installation in Santa Clara is the most common residential job we quote, because the city’s dominant housing stock is exactly the kind that needs it: single-story, low-slope ranch homes built between 1950 and 1975, with slopes between 2:12 and 4:12. Those original wood shakes and early composition shingles are past their designed lifespan, and much of the city is hitting the replacement wall at once.
Tear-off and class A assembly
Most Santa Clara shingle jobs are full tear-offs, not re-covers. The city enforces a Class A fire-rating requirement on re-roofs, and California’s Title 24 cool-roof mandate applies. That means the old shake can’t be buried under a second layer. It comes off, the decking gets inspected and repaired if needed, and the new roof goes down as a completely different assembly: new underlayment, ice and water shield in valleys and at eaves, and a reflective shingle system from GAF, CertainTeed, or Owens Corning.
Santa Clara pricing
A full tear-off and shingle installation on a typical Santa Clara ranch home of 1,200 to 1,800 square feet runs $9,500 to $14,900 depending on roof complexity, decking repair, and the shingle grade you choose. Larger homes, or homes with steep dormers and multiple valleys, fall in the $15,000 to $22,000 range. You’ll get a written price before any work starts, and it won’t change unless you approve a change order in writing.
Trusted Brands We Service in Santa Clara
We install and service shingles from GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral. For Santa Clara homeowners, that means access to the full range of manufacturer warranties and cool-roof rated shingle lines that meet Title 24. We stock the most commonly specified shingle colors and TPO accessories locally, so a Santa Clara roof installation doesn’t sit in limbo waiting for material to arrive from a regional warehouse. If you’ve already picked a specific Atlas or Boral profile, we’ll quote it directly.
Common Roof Installation Problems We See in Santa Clara Homes
- Rear-addition drainage failures. Many 1960s and 1970s ranch homes near the Santa Clara University corridor and Central Park have a rear addition with a built-up tar-and-gravel roof that was never properly tied into the main roof’s drainage plane. Water ponds at the transition, and the decking underneath rots quietly. We find this on maybe one in four Santa Clara tear-offs of that era.
- Undersized or damaged framing behind the decking. Piecemeal tract-home expansions from the era left some homes with framing that wasn’t designed for the added load. Once the old roof comes off and the decking is opened, we sometimes find rafters or purlins that need reinforcement before the new assembly goes on.
- UV-accelerated shingle granule loss. Santa Clara sits in a Bay Area thermal pocket that gets less daily fog burn-off than coastal cities, so roofs here get more intense UV exposure. Our summers regularly hit the mid-90s, and that accelerates granule loss and cracking on aging composition shingles. By the time homeowners notice, the shingles are usually past saving.
- Hidden water damage that announces itself in November. Santa Clara has six or more dry months followed by concentrated winter deluges. Roof failures that sit hidden through summer show up dramatically with the first November rains. That’s also why local roofers’ schedules compress in late fall. Scheduling your installation in spring or summer avoids the rush.
Pricing for Roof Installation in Santa Clara, CA
Here’s what you’re actually looking at, in real Santa Clara dollars. A full tear-off and architectural shingle installation on a standard 1,200 to 1,800 square foot ranch runs $9,500 to $14,900. A TPO installation on a flat or low-slope condo roof runs $3,800 to $6,900 for smaller sections and $8,500 to $14,500 for larger buildings. What moves the number: decking repair if rot is found, framing reinforcement on rear-addition transitions, the shingle grade you choose, and roof complexity including valley count and dormer configuration. You’ll get a written line-item price before any work starts, with any necessary change order priced and approved in writing first. Call (743) 200-8347 for a free estimate.
We Also Serve Cities Near Santa Clara
Mercer Roofing serves homeowners throughout the South Bay, including Sunnyvale, San Jose, Campbell, and Cupertino. If you’re in one of those neighboring cities and need the same written-price, badge-at-the-door standard, call us at (743) 200-8347. We coordinate all Santa Clara County work from our Bay Area office.
Serving Santa Clara, CA - Our Local Coverage Area
We’re based in the Santa Clara 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 Santa Clara
Because Santa Clara enforces a Class A fire-rating requirement on re-roofs, and California’s Title 24 cool-roof mandate applies to most residential installations, a re-cover over old shake or failed composition shingles usually fails both standards. The old roof comes off, the decking gets inspected, and the new assembly goes down from scratch. Call (743) 200-8347 for a written assessment of your roof.
Most commonly, we find rotted decking at the transition joint where a rear-addition built-up tar-and-gravel roof was never tied into the main drainage plane. We also find undersized or damaged framing and outdated wiring that a permit triggers code upgrades on. We price every surprise in writing and get your approval before we touch it.
In most cases, TPO is the better fit for Santa Clara’s climate, because it’s heat-welded, reflective, and performs well under the intense UV exposure and mid-90s temperatures this thermal pocket gets. EPDM is a viable alternative in some situations, but for Santa Clara’s 1970s and 1980s condo complexes, we typically recommend TPO with a 20-year material warranty. Call (743) 200-8347 for a written comparison for your building.
A roofing square is 100 square feet. Most Santa Clara ranch homes are 12 to 18 squares, which translates to the $9,500 to $14,900 range for a full tear-off and shingle installation. Knowing your square count matters when comparing bids because labor and material are quoted per square, and you want to confirm every bidder is quoting the same roof size. We’ll give you your exact square count, in writing, with every estimate.
Sometimes, yes. When we pull the permit and the roof is opened, Santa Clara’s building inspector may require corrections to undersized framing, outdated wiring, or improper ventilation before the new assembly passes inspection. We handle this the same way every time: identify the issue at inspection, price the repair in writing, and wait for your signed approval before any work proceeds. No surprises where your money is concerned.
Call Mercer Roofing at (743) 200-8347 to schedule your free Santa Clara roof installation estimate. You’ll get a live person, a written price before any work starts, and the name and photo of your technician before they arrive. Grant Whitlock and our crews have been doing this since 2000, and we’d be glad to take a look at your roof.
Written by Grant Whitlock, Owner at Mercer Roofing, serving Santa Clara since 2000.