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CGI Construction in West Hills, CA | Mason Remodeling Co Thousand Oaks
We’re Mason Remodeling Co Thousand Oaks, and we provide independent CGI window and door service across West Hills. We install, repair, and replace CGI products, and we do it without manufacturer constraints on parts or methods. The thing that makes our CGI work here different is simple: West Hills hillside homes punish bad flashing and lazy sealing faster than almost anywhere else in the region. If your CGI windows or doors are failing, call (805) 309-3386 for a free estimate.
Why West Hills Residents Choose Us for CGI Service
CGI makes a serious impact window and door line. We’ve put their Estate Collection and Sentinel Series into enough hillside homes across West Hills to know exactly how they behave under heat, wind, and storm-driven rain. As an independent provider, we’re not tied to a manufacturer playbook, so we can recommend what’s actually right for your house, not what a rep needs to sell this quarter. Isaac Pruett learned the trade at Los Angeles Trade-Technical College and spent years on job sites around the region before building our crew. He grew up in Los Angeles and knows these hills. We’ve served Thousand Oaks and the surrounding area for years, and West Hills homeowners call us for everything from General Contractor in West Hills work to specific repairs because we explain what’s happening, put the price in writing, and do the work without drama. Our technicians arrive background-checked, uniformed, with photo ID at the door, and you’ll know their name and face before they even pull up.
Styles & brands we work with







Common CGI Construction Problems We Solve in West Hills
- Warped frames on south-facing elevations. West Hills summer heat doesn’t mess around. Vinyl and aluminum frames on elevations that catch full afternoon sun expand and contract dramatically. Over years, that movement warps sashes, makes locks bind, and breaks weatherstripping. We see it most on 1970s and 1980s custom builds where window openings have shifted along with the framing.
- Failed casement and awning hardware from repeated thermal cycling. Original 1960s-80s framing moves. When the house settles and the sun beats down, casement cranks and awning operators take the abuse. We replace worn multi-point locking hardware with genuine CGI parts so the impact rating stays intact.
- Water intrusion around perimeter seals after winter storms. Hillside wind-driven rain finds every gap. When original flashing was done wrong or has corroded, water gets behind the frame and into the wall cavity. South of Victory Boulevard especially, old drainage systems push water straight at window wells and door thresholds.
- Brittle weatherstripping and glazing beads from dry heat and UV exposure. That relentless West Hills sun bakes rubber and vinyl until they crack. Degraded seals reduce impact performance and let air leak year-round. We replace them with materials rated for this climate’s UV load.
- Fogged or failing insulating glass units. When the seal on a CGI unit fails, you get condensation between the panes. Repairing just the glass is often possible, but if the frame is warped too, replacement is the honest recommendation because a new glass pack won’t fix a twisted frame.
CGI Service in West Hills: What Local Conditions Mean for Your Equipment
West Hills homes south of Victory Boulevard frequently still run on their original 1970s hillside drainage. Those systems were sized for a different climate, and they overwhelm window wells and door thresholds during winter storms. For a homeowner with CGI windows or doors, that means the difference between a dry interior and recurring water damage comes down to flashing and sill pan installation. We’ve rebuilt more drainage at the window line than we can count. If a contractor slaps a new CGI unit into an old opening without addressing the drainage underneath it, nothing about that window will perform the way it should. Expansive soils in this part of West Hills add another wrinkle, because pads shift, stucco cracks, and openings move. Proper shimming, backer rod placement, and sealant selection all have to account for that movement. Our crew replaced a row of original aluminum windows in a 1974 custom home on Saddlebow Road with CGI Estate Impact Windows after the homeowner noticed warped sashes and failed seals. During removal we found the old drainage channel was undersized and had been directing runoff straight into the wall cavity below the window, so we rebuilt the flashing and installed a new sill pan before setting the CGI units. No more water stains on the drywall after the first heavy rain.
CGI Models & Products We Service in West Hills
We work on CGI Estate Collection, Sentinel Series, Estate Impact Windows, and the Commercial Series. For critical components like laminated glass and multi-point locking hardware, we use genuine CGI replacement parts to maintain the unit’s impact rating. For non-structural items such as operator covers and trim, we’ll source high-quality aftermarket parts when they keep costs down without compromising function. We stock the common parts needed for fast turnarounds in West Hills and the surrounding area, and we source the rest quickly. For a deeper look at our CGI sales & service work, our brand page covers the full range. And when a frame is warped or an insulating glass seal has failed, we’ll tell you straight if replacement makes more sense than repair, because a repaired frame won’t restore full performance.
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AfterCGI Service Pricing in West Hills

Here’s what West Hills homeowners can expect to budget for the most common CGI projects we handle.
| Service | Price Range |
|---|---|
| CGI Impact Window Installation | $8,000 – $25,000 |
| CGI Window Replacement | $4,500 – $15,000 |
Your final cost depends on how many units you’re replacing, the series you choose, and what’s involved in the opening itself. A 1970s West Hills hillside home with settled framing and old flashing costs more to prep properly than a newer build with clean openings. That’s the honest truth. Our free estimate covers all of it: we inspect the existing units, check the drainage situation, and give you a written line-item price before any work starts. No verbal ballparks that turn into surprises. Call (805) 309-3386 to schedule yours.
Serving West Hills, CA - Our Local Coverage Area
We’re based in the West Hills 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 West Hills
Can CGI windows be installed in a West Hills hillside home with stucco exterior without removing the stucco?
Yes, in most cases. We can cut back the stucco only at the frame perimeter, install the new CGI unit, and patch the stucco cleanly. If the stucco is severely cracked from expansive soil movement, we may recommend removing a larger section to repair the substrate first. We’ll assess that during the free estimate. Call (805) 309-3386 to schedule a look.
How do CGI impact windows hold up to West Hills summer heat and direct sun?
CGI frames and laminated glass are engineered for high-heat, high-UV environments, and they hold up well when installed correctly. The failure point we see most often in West Hills is not the CGI product itself but the original window opening around it. Homes with 1960s-80s framing that’s moved over the years put stress on any window, and that’s when hardware binds and seals fail. Proper installation with room for thermal movement prevents most of it.
Do I need to replace my entire window if only the glass is cracked on a CGI unit?
Not always. If the frame is square and in good condition, we can often replace just the laminated glass pack and restore the unit’s impact rating. If the frame is warped or the seal has failed, replacing the glass alone won’t fix the underlying problem, and we’ll tell you that rather than take your money for a half-fix. Schedule an inspection and we’ll give you the straight answer.
What is the best CGI series for a West Hills home near the Santa Susana Mountains with high wind exposure?
For high wind exposure in West Hills, we typically recommend the CGI Estate Impact Windows or the Sentinel Series, depending on your opening sizes and aesthetic preference. Both carry the impact ratings serious wind zones demand. We’ll match the right series to your specific exposure and framing condition rather than pushing one product line on every job. Call (805) 309-3386 for a free estimate and we’ll walk you through the options.
Can you match the existing bronze finish of my 1970s CGI windows when replacing only some of them?
In many cases, yes. CGI’s current bronze finish options are close to the older 1970s bronze, and we can source trim, hardware, and frame colors that blend well with existing units. There are times when an exact match isn’t available, and we’ll be upfront about that before you commit to anything. Mention the existing finish when you call (805) 309-3386 and we’ll let you know what’s possible.
Service Areas Near West Hills
We serve West Hills and the surrounding communities, including Thousand Oaks, Calabasas, Oak Park, and Topanga. For neighbors to the west, see our CGI service in Thousand Oaks page. If you’re further east, our CGI service in Calabasas page covers that side of the hills. And for anyone outside these spots, our West Hills service area page maps out the full radius.
Book Your CGI Service in West Hills Today
Tell me what you need done. We’ll tell you what it costs and how long it takes, then we’ll do exactly that. That’s how Isaac Pruett runs every job, and it’s how we work in West Hills. Call (805) 309-3386 for a free estimate, and you’ll get a real person on the line who can schedule your inspection right away.
Written by Isaac Pruett, Owner at Mason Remodeling Co Thousand Oaks, serving West Hills and the surrounding area since 2004.











