Free roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Before
After
Before
After
Before
AfterFast, Reliable Roof Replacement Across San Lorenzo
Roof Repair - San Lorenzo and full replacement typically runs $14,000 to $28,000 for a standard single-story Bohannon tract home, depending on decking condition and material choice. Most San Lorenzo roofs are original or second-layer composition shingles over 70-year-old board sheathing, which means tear-off and decking assessment are the norm, not the exception. Our crews know these homes on sight. We pull permits through Alameda County, show up when we say we will, and hand you a written price before any work starts. Call (945) 303-9821.
Why Tilehurst Roofing Is San Lorenzo’s Preferred Roof Replacement Company
Tilehurst Roofing is a Kingswell family company, founded in 2000, and every San Lorenzo job follows the same Kingswell Way: say the price before the work, show up in the window we gave, leave the place cleaner than we found it, put the guarantee in writing, and come back if something fails. Our Roof Replacement crew knows the difference between a Bohannon Village roof from 1948 and a Hayward hillside roof from 1988, and that matters when you are pricing decking work.
Homeowners across San Lorenzo have told us the same story: a contractor no-showed, or changed the number at the door, or patched a leak that failed by spring. We run background-checked, uniformed technicians on every job, and a live person answers every call 24 hours a day, 7 days a week. That includes evenings and weekends. You call, a person picks up. No voicemail queue.
We are not the cheapest bid, and we will not pretend otherwise. We are the crew that puts decking replacement, ice and water shield, and county permitting into the written quote before you sign. That is the honest way to price a San Lorenzo roof.
Roof Installation in San Lorenzo
Roof installation in San Lorenzo is rarely a simple shingle swap. Because most homes here were built between 1944 and 1955 by David Bohannon’s tract operation, the roof structure is uniform: low slopes, hip or gable geometry, original board sheathing. Our roof installation process starts with a full tear-off down to the framing, then a board-by-board decking assessment. Rotted, cracked, or split boards come out before new sheathing goes down. That is not an upsell. That is the job.
Tear-Off and Sheathing Assessment
Skip sheathing under three layers of old composition shingles has spent 70 years drying out. By the time we open a San Lorenzo roof, some boards are crumbled at the edges or soft around the pipe penetrations. We replace the compromised boards, then lay a clean deck before underlayment. You see a written line item for every board, not a vague “decking repair” number.
Underlayment, Ventilation, and New Shingles
After decking, we install ice and water shield at eaves and valleys, then synthetic underlayment across the field. Low-pitched roofs in the marine layer fog need that barrier at the bottom edge. We set new architectural shingles with a starter strip and ridge vent. The result is a roof that drains correctly, breathes, and handles damp mornings without buckling or algae bloom.
Roof Replacement Contractor in San Lorenzo
A roof replacement contractor in San Lorenzo has to know Alameda County building code and permit workflow, not just what a shingle nailer does. Tilehurst Roofing coordinates every permit through the Alameda County Community Development Agency, because San Lorenzo is unincorporated and there is no city building department to call. We handle submittal, inspection scheduling, and final sign-off so you never stand in a county office line.
Written Allowances for Hidden Damage
Every San Lorenzo roof we replace includes a written allowance for decking, fascia, and valley repairs. When we find rotted soffit or a failed valley after the roof is open, we photograph it, price it, and get your approval in writing before we touch it. No change orders at the door. No “it will probably be fine” guesses. The number stays honest.
365-Day Done Right Promise
If something is not done right, we make it right for a full year after the job. That is the Tilehurst Roofing guarantee in plain writing. Every repair, every replacement, every deck board. You get a written guarantee before the crew leaves, not mailed later. And if a repair fails inside the guarantee period, we come back at no charge.
Trusted Brands We Service in San Lorenzo
We install and service roofing systems from GAF, CertainTeed, and Owens Corning, so your San Lorenzo roof gets a product that fits your home’s geometry and your budget, not whatever happens to be in the truck. We stock local parts and common flashing profiles for San Lorenzo’s newer neighborhoods near Hesperian Boulevard and the older Bohannon Village blocks. Most full replacements are ready to schedule within two weeks of your approval.
Common Roof Replacement Problems We See in San Lorenzo Homes
- Brittle board sheathing under layered shingles. Most 1944-1955 Bohannon roofs carry two or three layers of composition shingles over original boards that have dried to the point of splitting. A tear-off routinely exposes cracked boards that must be swapped before new decking goes down.
- Overnight marine layer fog causing algae and granule loss. San Lorenzo’s flatlands position means roofs stay damp from evening through morning for much of the year. Shingles that never dry out lose granules faster, especially near the eaves.
- Drainage rot at the soffit and fascia near San Lorenzo Creek. Low-graded postwar lots pool water at the roof edge. Failed drip edge or clogged gutters show up as rotted fascia boards, and a shingle-only bid misses that damage completely.
- Valley leaks on low-pitched hip roofs. Sal Lorenzo’s Bohannon geometry includes a lot of hips and valleys, and when a valley flashing fails, water spreads under the shingles for months before you see a ceiling stain. Ice and water shield at the valleys is the fix, and it belongs in the quote.
Pricing for Roof Replacement in San Lorenzo, CA
A full tear-off and re-roof on a typical 1,000 to 1,400 square-foot San Lorenzo tract home runs $14,000 to $22,000 in architectural shingles. If your roof needs substantial decking replacement, fascia repair, or new gutters, the final number lands closer to $22,000 to $28,000. Flat roofs and mid-century ranch styles fall on the upper end. We give you a written line-item quote before any work begins, and that number does not move unless you approve a written change order. Call (945) 303-9821 for a free estimate.
We Also Serve Cities Near San Lorenzo
Our crews are local to the East Bay flatlands and regularly replace roofs in San Lorenzo‘s neighboring communities, including Castro Valley, San Leandro, Union City, and Oakland. Same crew, same written guarantee, same county-level permit knowledge across the unincorporated zones.
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 Replacement in San Lorenzo
Yes. San Lorenzo is unincorporated Alameda County, so your roof replacement permit runs through the Alameda County Community Development Agency, not a city building department. We pull the permit, schedule the inspections, and handle every piece of paperwork as part of the job. Call (945) 303-9821 and we will confirm the current filing requirements for your specific property.
Your home’s decking was likely installed as board sheathing in the 1940s or early 1950s, and after 70-plus years it has dried out and turned brittle. A neighbor’s home may have had decking replaced in a prior re-roof, or their boards may simply be in better shape. The only way to know is to tear off the old shingles and look. We price decking as a written allowance so you are not surprised by the line item.
The fog itself will not damage a properly installed new roof, but it does keep shingles damp longer, which is why we install ice and water shield at the eaves and valleys and recommend algae-resistant shingles for San Lorenzo homes. The old roof failed in part because it never dried out. The new one gets built for that exact condition.
We photograph it, write a line-item price for the repair, and get your written approval before we do the work. You never get a lump-sum change order at the end. The written allowance in your contract covers exactly this situation, and the final invoice matches what you approved. Call (945) 303-9821 and we will walk you through how allowances work.
A square is 100 square feet of roof surface, the standard unit roofers use to price materials and labor. Your quote should state the exact number of squares being torn off and re-roofed, so you can verify the math against your roof’s size. A vague quote that skips square count is a red flag. Our written quotes always include the square total, decking allowance, and material brand by name.
Written by Greg Holloway, Owner at Tilehurst Roofing, serving the San Francisco Bay Area since 2000.