Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Why San Francisco Homeowners Choose CGI Construction
Bradford Remodeling Co San Francisco provides independent CGI in San Francisco construction repair and installation across San Francisco, from window and door service to roofing and cabinet work tied to CGI product lines. We work on Estate Collection windows, Signature Series doors, and CGI-installed single-ply roofing, with written pricing before any work starts and a full-year guarantee on every completed job. We’re not a CGI dealer or authorized service center – we’re an independent contractor whose crew has spent years learning how these products hold up in San Francisco’s fog, salt air, and seismic conditions. If you need a straight answer on whether to repair or replace a CGI product, call (831) 610-5598.
Why Trust Bradford Remodeling Co San Francisco for Your CGI Construction?
Most contractors in San Francisco can install a window. Few can tell you why your CGI Estate Collection frame cracked at the lower corner after three fog seasons, or whether your Signature Series door glass has a seal failure or a condensation problem from improper flashing. Curtis Lane, owner of Bradford Remodeling Co San Francisco, has been reading structural drawings and running material takeoffs since his days at Los Angeles Trade-Technical College, and he’s spent two decades working through the specific ways San Francisco’s climate punishes building materials. His crew has done enough gut-and-rebuild work in the Outer Sunset to know exactly how fog-driven moisture moves through older balloon-frame walls and what that means for any window or door you put back in.
We approach CGI service the way Bradford approaches every job: scope it, price it, put it in writing, and stand behind it. That’s The Garrison Standard, the framework we’ve operated under since joining the Garrison Partners family in 2004. It means you get a written price before work begins, a documented scope, and the 365-Day Done Right Promise – if the work fails within a year, we return and correct it at no charge. For CGI products specifically, that promise covers our installation and repair labor alongside whatever manufacturer warranty still applies to the materials.
Styles & brands we work with
Common CGI Construction Problems We Fix in San Francisco
- Hairline cracks at fiberglass window frame corners. CGI Estate Collection windows are solid products, but San Francisco’s fog-to-sun thermal cycles stress the frame corners. The fiberglass expands and contracts repeatedly, and after enough cycles the corners develop hairline cracks that let moisture in. We see this most often on south-facing elevations in Noe Valley and Bernal Heights, where morning fog burns off into direct afternoon sun.
- Seal failure and internal condensation in impact-rated door glass. Signature Series entry doors with impact-rated glass are built for hurricane zones, but the laminated glass seals still degrade when they face five to seven years of salt air and persistent marine layer. Homes in the Outer Richmond and Sunset districts get hit hardest. The glass fogs internally, and no amount of cleaning fixes it because the desiccant inside the seal is spent.
- Roofing membrane pulling away from parapet walls and penetrations. CGI-installed TPO and PVC single-ply membranes on flat and low-slope roofs have a known weak point: the terminations at parapets, skylights, and vent penetrations. In older Sunset and Richmond district homes with wood-framed parapets, the membrane adhesive fails slowly under constant moisture, and water works its way behind the flashing. This is not a product defect so much as a San Francisco reality – flat roofs here live in fog for months.
- Aluminum cladding corrosion near the bay. CGI windows and doors with aluminum cladding perform fine inland, but homes within a few blocks of the bay see pitting and white corrosion where salt air contacts scratched or unpainted aluminum. The fix is usually localized cleaning, priming, and repainting rather than full replacement, but ignored corrosion will eventually compromise the cladding’s seal against the frame.
- Cabinet and millwork movement in older San Francisco homes. CGI-compatible cabinet installations in Victorians and Edwardians have to account for floors that are not level and walls that have settled a half-inch over a century. Doors that bind, drawers that stick, and face frames that pull away from walls are usually installation failures on the original job, not material defects. We correct the substrate and reinstall properly.
CGI Parts & Our Repair-vs-Replace Approach
When a CGI product fails, the first question is whether to patch it or replace it. Our answer depends on what failed and why. We use OEM CGI parts when lead times and availability allow, particularly for structural components still under manufacturer warranty – sashes, frame sections, impact glass units, and roofing membrane from CGI’s approved line. But CGI has discontinued certain trim profiles and hardware sets over the years, and waiting eight weeks for an obsolete part that may never arrive doesn’t serve anyone. In those cases we source equivalent aftermarket parts from Bay Area suppliers we’ve vetted over years of working together.
The harder call is frame damage. A cracked fiberglass frame corner can sometimes be reinforced and sealed, but if the crack propagates into the structural web of the frame, repeated repairs become a losing game. For severe frame warping or any compromise to an impact-rated door’s glass system, we recommend full replacement. San Francisco sits in earthquake country and wind zones that matter for taller buildings, and a window or door that no longer meets its structural rating is not something to patch. Call (831) 610-5598 and we’ll give you a straight assessment.
Our CGI Service Process – Step by Step
- 1
Diagnosis. We inspect the product in place, identify the failure mode, and document what we see. For CGI windows and doors we check frame integrity, glass seals, flashing condition, and substrate health behind the unit. For roofing we probe membrane seams and terminations, not just the visible leak spot.
- 2
Written scope and price. Before any tool comes out, you get a written scope of work and a fixed price. The Garrison Standard means the number doesn’t move at the door. No change orders unless you ask for changes.
- 3
Repair or installation. Our technicians show up in uniform, background-checked, and ready with the right parts. We use OEM CGI components where appropriate and quality aftermarket parts where that’s the honest call. Every step follows the manufacturer’s installation specs so we don’t void any remaining warranty coverage.
- 4
Testing and verification. Windows and doors get operated repeatedly, checked for square and seal, and inspected for water intrusion readiness. Roofing gets a water test on critical seams before we call the job done.
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Warranty close-out. You receive a signed written guarantee before we leave. That’s the 365-Day Done Right Promise. If anything we touched fails within a year, we’re back at no charge.
See the difference
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AfterCGI Products We Service & Install in San Francisco
Our crew works on the CGI product lines most common in San Francisco homes. That includes Estate Collection fiberglass replacement windows, Signature Series entry doors with impact-rated glass, and CGI-installed TPO and PVC single-ply roofing systems on flat and low-slope roofs. We also handle CGI-dealer-installed HardiePlank lap siding when it needs repair or replacement, and we work with CGI-compatible cabinetry for kitchens and baths. We keep common parts and materials in local stock for faster turnaround: window sashes, door hardware sets, membrane seam kits, and flashing components. For larger pieces we order direct and coordinate delivery around your schedule.
We Also Service These Brands
Bradford Remodeling Co San Francisco is not a single-brand shop. Beyond CGI, we work regularly with KraftMaid cabinets, Cambria and Silestone surfaces, and Kohler fixtures. That matters because most San Francisco homes mix brands across rooms. We can handle the CGI window in the front bedroom and the KraftMaid kitchen cabinets in the same project without splitting the job between contractors, and we also offer Cgi service in Oakland.
FAQs – CGI Construction Service in San Francisco
No. We are an independent CGI service provider, not an authorized dealer or warranty station. That independence is why we can tell you when a repair makes more sense than a replacement, or when a CGI product isn’t the right fit for a particular San Francisco elevation. Our recommendations come from field experience, not from a manufacturer’s sales target.
Yes, when they’re available and appropriate. For structural components still under manufacturer warranty – window sashes, frame sections, impact glass, roofing membrane – we use OEM CGI parts. For discontinued trim profiles, obsolete hardware, or cases where an equivalent aftermarket part performs identically, we source from Bay Area suppliers we’ve worked with for years and tell you which is which before we install anything.
Most window and door repairs take one day on site. Roofing membrane repairs on CGI-installed systems typically take one to two days depending on the number of terminations involved. Full window replacements run one to two days per opening. Larger jobs like full roof replacement or multi-room cabinet installation follow a written schedule we provide before work starts. Call (831) 610-5598 for a timeline on your specific project.
We service and install Estate Collection fiberglass windows, Signature Series entry doors, TPO and PVC single-ply roofing systems installed through CGI’s roofing line, and CGI-dealer-installed HardiePlank siding. We also handle cabinetry projects that tie into CGI-compatible kitchen and bath installations. If you’re unsure whether your product falls under our scope, describe it over the phone and we’ll tell you straight.
Our work follows CGI installation specifications, and we don’t alter structural components in ways that would void manufacturer coverage. Where your CGI product still carries a warranty, we coordinate with the manufacturer on covered components. Our own 365-Day Done Right Promise covers our labor and installation regardless of the product’s warranty status.
Here are the price ranges we quote for the most common CGI service calls in San Francisco:
| Service | Price Range |
|---|---|
| CGI window replacement (per average opening) | $5,310 – $17,700 |
| Roof replacement with CGI-installed single-ply membrane | $9,440 – $23,600 |
| Cabinet installation and refacing (CGI-compatible custom cabinetry) | $4,720 – $15,340 |
These are written-price ranges. You’ll get an exact number before any work starts, and that number does not move at the door. Call (831) 610-5598 to schedule a free estimate.
Fog itself doesn’t damage fiberglass – thermal cycling does. In neighborhoods like the Richmond and Sunset, windows go from fog-soaked overnight cold to direct afternoon sun within hours. That repeated expansion and contraction is what eventually cracks frame corners and stresses glass seals, which is why we also provide CGI in San Mateo with the same attention to detail. Proper installation with good sill flashing slows the process significantly, which is why we spend extra time on flashing details during every CGI window install in San Francisco.
That depends on exposure and what you’re protecting against. San Francisco doesn’t get hurricanes, but ocean-facing rowhouses in the Outer Sunset take relentless salt air, and impact-rated glass provides a real barrier against wind-driven debris during winter storm events. The tradeoff is that laminated glass seals fail over time in marine air. If you’re buying a Signature Series door, plan for seal inspection every five to seven years. Call (831) 610-5598 and we’ll evaluate your specific elevation and exposure.
Yes, within the limits of UV aging. CGI’s standard white has a specific formulation, and we carry factory-matched touch-up paint for minor frame repairs. But every white finish yellows slightly with age, so a brand-new sash next to a 12-year-old frame won’t match perfectly. When matching matters, we’ll tell you what’s achievable before we order parts, not after.
This is the most common CGI roofing failure we see in San Francisco. Single-ply membrane terminations at skylight curbs depend on adhesive and flashing details that degrade under constant fog moisture, and once water gets behind the membrane it travels laterally – so the leak you see inside may be six feet from the actual breach. We don’t patch the visible spot. We probe the termination, find the real entry point, and repair the seam properly. Call (831) 610-5598 for a roof inspection.
Cracks at the corners are progressive. A hairline crack that’s cosmetic today becomes a moisture entry point within a season or two in San Francisco’s climate, and once water gets into the frame core, the fiberglass can delaminate and lose structural stiffness. We recommend addressing corner cracks within 12 months of first noticing them. Some can be repaired; some require frame replacement. Last month our crew replaced a CGI Estate Collection bay window in a 1920s Marina District home where the original fiberglass frame had cracked at the lower corners, letting in fog moisture. We reused the OEM sash and installed a new frame with upgraded sill flashing, and the homeowner no longer sees condensation on the glass even on the foggiest mornings.
Book Your CGI Service in San Francisco, CA
Straight number, real scope, no surprises at close-out. That’s how Curtis Lane and the Bradford Remodeling Co San Francisco crew run every CGI job. Call (831) 610-5598 to schedule your free estimate, or to talk through what you’re seeing with your CGI windows, doors, or roofing before you decide anything.
Written by Curtis Lane, Owner at Bradford Remodeling Co San Francisco, serving San Francisco since 2004.
