Free roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Before
After
Before
After
Before
AfterFast, Reliable Roof Installation Across San Lorenzo
A new roof installation in San Lorenzo typically runs $12,000 – $28,000 for standard residential homes, with most projects completed in 3 – 5 business days once materials arrive. We handle everything from permits to final inspection, and our crews are already working in Alameda County neighborhoods like yours.
San Lorenzo sits in a tricky spot, climate-wise. You’re close enough to the bay to catch that persistent marine layer rolling through the Ashland and Cherryland areas most mornings, but far enough inland that summer heat can spike into the 90s for weeks straight. That temperature swing, plus the older housing stock built during the 1950s and 1960s boom, means roofs here age differently than they do in Oakland or even Castro Valley just up the road. We’ve replaced enough roofs on those mid-century ranch homes along Hesperian Boulevard and Lewelling Boulevard to know where the weak points hide.
When you call Crestview Roofing at (325) 246-5075, a live person answers, 24/7. We’ll book your free estimate, send you a written price before any work starts, and track our crew’s arrival so you’re not stuck waiting around.
Why Crestview Roofing Is San Lorenzo’s Preferred Roof Installation Company
Dylan Pace built Crestview Roofing in 2000 on a simple idea: homeowners deserve to know exactly what they’re paying for and exactly when someone’s showing up. That became The Relay Visibility Guarantee, and it’s how we still operate today in San Lorenzo and across the Bay Area.
Our dispatch team coordinates from our San Francisco Bay Area office, but the crews serving San Lorenzo live and work locally. They know the difference between a roof on a flat-top Eichler-style home near Washington Manor and a pitched roof in the hills above San Lorenzo, and they plan material delivery and staging accordingly.
Every technician is background-checked and uniformed. You’ll get their name and photo before they arrive, plus a live tracking link. We document everything with before-and-after photos, and your invoice arrives by text, the same day the job wraps.
Our Roof Installation team also carries the full manufacturer warranties from the brands we install, layered underneath our own 365-Day Done Right Promise. If anything we repair fails within a year, we come back and fix it free, including the second visit.
Roof Flashing Installation in San Lorenzo
Roof flashing installation in San Lorenzo addresses the metal strips that seal joints around chimneys, vents, skylights, and where roof planes meet walls. On the older homes common in neighborhoods near San Lorenzo Park and the flats along East 14th Street, original flashing often corrodes after decades of salt-laden bay air and winter rain accumulation. A typical flashing repair or replacement section in San Lorenzo runs $350 – $850, depending on accessibility and how many linear feet need work.
Chimney and Vent Sealing
Chimney flashing takes the worst beating in San Lorenzo because thermal expansion from those hot inland afternoons against cool marine mornings literally pulls the seal apart year after year. We remove the old step flashing and counter-flashing, inspect the underlying sheathing for rot, and install new galvanized or copper pieces with a waterproof membrane backing.
Valley and Wall Junctions
Where a roof meets a second-story wall, or where two roof slopes form a valley, water concentrates during our winter storms. Poor flashing here sends water straight into the attic. We install woven or closed-cut valley flashing with ice-and-water shield underlayment, which matters more than you might think during those February atmospheric rivers that stall over the East Bay.
TPO Roofing Installation in San Lorenzo
TPO roofing installation in San Lorenzo is what we recommend for flat or low-slope roofs, especially on the commercial buildings and some residential additions near the industrial corridors along Davis Street and the commercial pockets near Bayfair Center. TPO, short for thermoplastic polyolefin, is a single-ply white membrane that reflects heat rather than absorbing it, which cuts cooling costs significantly during San Lorenzo’s warm late-summer stretches. A typical TPO installation here runs $8,500 – $18,000 depending on square footage, insulation needs, and whether we’re tearing off an old built-up roof or going over existing substrate.
Energy Efficiency for Flat Roofs
White TPO membranes carry an Energy Star rating and can drop roof surface temperatures by 50 degrees or more compared to black asphalt. For the flat-roofed commercial buildings and some mid-century modern homes in San Lorenzo, that translates to real utility savings during September and October when inland heat peaks.
Heat-Welded Seams
Unlike older roll roofing that relies on adhesive, TPO seams are heat-welded with automated hot-air equipment. The bond becomes stronger than the membrane itself. We weld all field seams, perimeter edges, and penetration flashings, then test with probe and vacuum methods before signing off.
Trusted Brands We Service in San Lorenzo
We install GAF Timberline HDZ and CertainTeed Landmark shingles on most San Lorenzo homes, with Atlas StormMaster Slate and Tamko Heritage available for homeowners who want a different look or enhanced wind rating. Every brand we carry, including Boral concrete and clay tiles for the Spanish-style homes scattered through the hills, comes with full manufacturer warranty registration handled by our office. We don’t special-order and disappear; we stock common colors and styles locally so your job isn’t held up waiting for a truck from Sacramento. That matters in San Lorenzo, where a gap in roofing during winter can mean real water damage inside those older plaster and lath walls.
Common Roof Installation Problems We See in San Lorenzo Homes
- Original wood shake roofs past 40 years. Many homes near San Lorenzo Creek and the older neighborhoods off Hesperian still have their original cedar shakes, now brittle and full of dry rot. Insurance companies here are increasingly refusing to renew policies until replacement is complete.
- Improper venting trapping bay moisture. San Lorenzo’s marine layer keeps humidity elevated for hours each morning. Without adequate ridge and soffit ventilation, that moisture condenses in attics and destroys decking from the inside out, even when shingles look fine from the street.
- Layered roofs exceeding weight limits. It’s common to find two or even three layers of asphalt over original wood in the postwar tract homes. Building codes in Alameda County now limit new installations to two layers maximum, and most quality jobs require a full tear-off to inspect what’s underneath.
- Flashing failures at additions and dormers. The 1970s and 1980s saw a wave of second-story additions and garage conversions in San Lorenzo. Many were flashed with cheap aluminum that corroded where it meets stucco or siding, creating chronic leak paths that homeowners mistake for window or plumbing problems.
Pricing for Roof Installation in San Lorenzo, CA
Most complete roof installations in San Lorenzo fall between $12,000 and $28,000 for standard single-family homes under 2,500 square feet. Here’s how that breaks down:
| Project Scope | Typical Range in San Lorenzo |
|---|---|
| Asphalt shingle tear-off and replacement | $12,000 – $22,000 |
| Premium architectural shingle upgrade | $18,000 – $28,000 |
| Flat/low-slope TPO membrane | $8,500 – $18,000 |
| Flashing repair or replacement (per section) | $350 – $850 |
| Wood decking replacement (per sheet) | $85 – $150 |
What moves you within these ranges? Roof pitch matters; steeper roofs require more labor and safety equipment. Accessibility for material delivery around San Lorenzo’s narrower streets and older driveways can add setup time. Decking condition is the big unknown, and we won’t know until tear-off whether decades of minor leaks have compromised the plywood underneath. That’s exactly why we deliver a written, line-item price before any work begins, with clear language on what happens if we find unexpected damage. No change orders slipped in after you’re committed. Call (325) 246-5075 to schedule your free estimate.
We Also Serve Cities Near San Lorenzo
Our crews work throughout the East Bay, and we regularly handle Roof Repair in San Lorenzo plus full replacements in Castro Valley, San Leandro, Union City, and Oakland. If you’re on the border between San Lorenzo and one of these neighbors, don’t worry about which city to pick when you call, we’ll sort out the logistics. We also offer Roof Replacement in San Lorenzo for homes where repair won’t safely extend the roof’s life.
Serving San Lorenzo, CA – Our Local Coverage Area
We’re based in the San Lorenzo 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 San Lorenzo
We typically schedule roof installation estimates in San Lorenzo within 1 – 3 business days of your call, and our live dispatch team can often accommodate same-week appointments. You’ll receive a precise arrival window and a tracking link once your technician is en route. Call (325) 246-5075 to book, estimates are free.
Yes, we install roofs throughout San Lorenzo including Ashland, Cherryland, Washington Manor, and the areas near San Lorenzo Park and Lewelling Boulevard. Our crews know the local permit requirements for unincorporated Alameda County and the specific challenges of each neighborhood’s housing stock.
We do not offer same-day roof installation, roofing is planned construction work requiring permits, material ordering, and crew scheduling. However, if you have active leaks or storm damage, our team can perform temporary emergency patching to stop water intrusion while we plan the full installation. Call (325) 246-5075 anytime, a live person will answer.
San Lorenzo pricing is generally comparable to Castro Valley and San Leandro, sometimes slightly lower than Oakland due to easier parking and material staging. The biggest cost driver is your specific roof’s condition and complexity, not your zip code. We use the same written pricing standard across all our Bay Area service areas.
Every roof installation in San Lorenzo carries the manufacturer’s warranty on materials, ranging from 25 years to lifetime depending on the shingle or membrane you select, plus our 365-Day Done Right Promise on all repair and installation workmanship. If anything we installed fails within that first year, we fix it free, including the second visit, with no negotiation or runaround.
Written by Dylan Pace, Owner at Crestview Roofing, serving San Lorenzo and the East Bay since 2000.