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CGI Construction in Brentwood, CA | Mason Remodeling Co Woodland Hills
We provide independent CGI window and door service across Brentwood, from the Villages at Brentwood to the estate properties on the city’s outskirts. Our crew has installed and serviced CGI products in Brentwood’s newer master-planned developments for years, which means we know exactly how these windows and doors behave in this specific climate. Brentwood’s inland heat and winter tule fog create failure patterns you won’t see in coastal Bay Area towns, and we’ve learned to spot them early. Call (831) 290-6866 to schedule a free estimate.
Why Brentwood Residents Choose Us for CGI Service

We’re an independent CGI service provider, not a manufacturer-affiliated shop. That matters because it means we tell you what your windows actually need, not what a corporate program says to sell. Isaac Pruett, our owner, trained at Los Angeles Trade-Technical College and spent years on job sites across the Valley before building Mason Remodeling Co Woodland Hills. As a General Contractor - Brentwood area professional, he’s the kind who will tell you straight whether a sash replacement makes sense or whether you’re better off replacing the whole unit.
Brentwood homeowners call us because we show up with the specific knowledge this city requires. We’re part of the CGI sales & service network serving Contra Costa County, and we stock CGI-compatible hardware and glass locally so turnaround stays short. Every job gets a written price before we start. No exceptions. Our technicians arrive in clean uniforms with photo ID badges, and you’ll know their name and face before they ever ring the bell.
Styles & brands we work with







Common CGI Construction Problems We Solve in Brentwood
- Thermal expansion stress on frame corners. Brentwood swings from 100°F summer days to freezing winter nights, and that repeated expansion and contraction works on CGI frame corners until seals fail or visible gaps open up. We re-square frames and replace compromised sealant before moisture finds its way inside.
- Improperly shimmed CGI 9500 Series sliding glass doors. Many Brentwood homes are slab-on-grade construction from the 1990s and 2000s, and foundations settle. If a 9500 Series door wasn’t shimmed correctly at installation, the rollers wear unevenly and the door binds. We reset the door, replace worn rollers, and correct the shimming.
- Fogging between panes in CGI insulated glass units. When the original desiccant in the spacer fails, moisture gets trapped between the glass. Brentwood’s winter tule fog makes this worse because humidity levels stay high for weeks. We replace the insulated glass unit with factory-spec spacers and argon fill.
- Faded and brittle weatherstripping on CGI casement windows. Brentwood’s intense inland sun breaks down rubber and vinyl weatherstripping faster than coastal areas. We replace it before drafts and dust become a problem.
- Blown seals on CGI Sentinel Series impact windows. Repeated thermal cycling stresses the perimeter seal on impact-rated glass. We’ve seen this most often in neighborhoods where homes get full afternoon sun exposure with no shade cover.
CGI Service in Brentwood: What Local Conditions Mean for Your Equipment
Brentwood homeowners in the Villages at Brentwood frequently pair CGI impact windows with whole-home generators to harden against PG&E public safety power shutoffs. That redundancy is not common in neighboring Oakley, where newer construction is less generator-ready. What this means for CGI owners is simple: your windows are doing double duty. They’re protecting against intrusion and impact, but they’re also your home’s thermal envelope during multi-day outages when the HVAC can’t run. A CGI window with a blown seal or failed weatherstripping loses its insulating value exactly when you need it most. In the Villages, where homes sit close together and afternoon temperatures climb, we recommend an annual seal and weatherstripping check before fire season starts.
CGI Models & Products We Service in Brentwood
We service CGI Sentinel Series impact windows, the Estate Collection fixed and casement windows, 9500 Series sliding glass doors, and custom radius and shaped windows installed throughout Brentwood. For parts, we use CGI factory replacements whenever they’re available because fit and finish matter on a product built to this standard. When a line is discontinued or you need a faster turnaround, we source aftermarket glass and hardware that meets or exceeds the original specs. If a frame is warped or the glass pack is compromised beyond a simple sash replacement, we’ll tell you plainly and recommend full unit replacement rather than patching something that will fail again.
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AfterCGI Service Pricing in Brentwood

Here’s what CGI work typically costs in the Brentwood market:
| Service | Typical Brentwood Price Range |
|---|---|
| Impact Window Installation | $8,000 – $25,000 |
| Window Replacement | $4,500 – $15,000 |
| Roof Repair | $400 – $1,800 |
Your actual cost depends on window count, frame condition, whether we’re doing a full frame replacement or a sash-only repair, and what finish details your home requires. We deliver a written price before any work starts, and that price doesn’t change once the job begins. Call (831) 290-6866 for a free estimate and we’ll give you exact numbers for your specific windows.
Serving Brentwood, CA - Our Local Coverage Area
We’re based in the Brentwood 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 – CGI Construction in Brentwood
Yes. Most Brentwood homes have stucco exteriors, and CGI impact windows are heavier than standard units, which means the flashing and integration details have to account for the extra weight and the stucco’s expansion characteristics. This is something we address regularly in our Bathroom Remodeling in Brentwood projects as well. We cut back the stucco cleanly, install proper pan flashing and perimeter sealant, and tie the window into the existing weather-resistant barrier so water sheds away from the opening. Call (831) 290-6866 and we’ll walk you through what your specific home needs.
Condensation on the interior side of the glass is usually a humidity issue, not a window failure. Brentwood’s winter tule fog keeps outdoor humidity high for days, and if your home’s interior humidity is also elevated, the glass surface can collect moisture. We check the door’s weatherstripping and seal integrity first, then help you address the indoor humidity source. If the condensation is between the panes, that’s a failed seal and we’ll replace the insulated glass unit. Call (831) 290-6866 for an evaluation.
In many cases, yes. If the fogging is limited to one sash in a casement or fixed unit, we can replace the insulated glass unit in that sash without touching the frame. That saves you money and keeps your home’s existing finish intact. We’ll tell you if the frame itself is compromised, in which case a full unit replacement is the better long-term choice. Estimates are free – call (831) 290-6866.
In Brentwood’s climate, you can expect CGI weatherstripping to last roughly 5 to 8 years before the inland sun and heat cause it to fade, harden, or lose its compression. Then you’ll start to feel drafts or see dust accumulating along the sash edges. We stock replacement weatherstripping for common CGI models and can swap it out quickly. Call (831) 290-6866 and we’ll check yours.
Yes, but the integration details matter. We work with the tile manufacturer’s installation procedures and use the correct flashing kits so the tile warranty remains intact. Our crew has done this on Brentwood homes with concrete and clay tile roofs, and we pull the necessary permits before work starts. Call (831) 290-6866 for a free estimate and we’ll review your specific roof.
Service Areas Near Brentwood
In addition to Brentwood, we serve nearby communities including Brentwood service area coverage throughout eastern Contra Costa County. Our team also handles CGI work for homeowners in CGI service in Woodland Hills and CGI service in Sherman Oaks, along with Agoura Hills, Bel Air, and Mission Hills.
Book Your CGI Service in Brentwood Today
Tell me what you need done. I’ll tell you what it takes and what it costs. Then we get to work. Call (831) 290-6866 and a live person will answer. We’ll schedule your free estimate and put your written price in your hands before any work begins.
Written by Isaac Pruett, Owner at Mason Remodeling Co Woodland Hills, serving Brentwood since 2004.











