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Fast, Reliable Impact Windows & Doors Across Moraga
If you live in Moraga, the question is rarely whether your windows need replacing. It’s whether the replacement will pass Cal Fire inspection. Because Moraga sits almost entirely inside a designated High or Very High Fire Hazard Severity Zone, any window or sliding glass door replacement on most homes must meet California’s Chapter R337 fire-resistant construction standards. That means multi-pane tempered glass, fire-rated frame assemblies, and properly sealed penetrations. Most flatland East Bay contractors don’t deal with this daily. Our Impact Windows & Doors team does, and we’ve been doing it long enough to know what the Moraga inspectors will flag before they flag it. Call (888) 635-0804 and we’ll walk you through exactly what your house needs.
Why TruePane Windows & Doors Is Moraga’s Preferred Impact Windows & Doors Company
Dale Kessler started TruePane in 2008 because he kept seeing the same problem: windows installed out of true, warranties voided because nobody registered the paperwork, and homeowners left arguing with manufacturers who pointed at the installer. That founding rule, “if the pane is not true, the job is not done,” still hangs on the whiteboard. Our techs work every Moraga job like the inspector is standing over their shoulder, because in this town, that’s often exactly what happens.
Moraga homeowners call us because we know the housing stock. Most homes here went up between the late 1960s and mid-1980s, which means original single-pane aluminum windows, hollow-core exterior doors, and aluminum-frame sliding glass doors that fail HFHSZ code the moment they need any work. We do not do pocket-insert jobs that should be full frame-outs just to keep a bid low. We tell you what the code requires, what the house actually needs, and then we do it right. Our Moraga customers get written quotes with both warranty layers registered before our truck leaves the driveway, covered by the Done Right Promise. A live person answers our phone 24/7, so when you call with a fogged pane on a Saturday morning, you talk to a person who can help, not a voicemail tree.
Our Impact Windows & Doors Services in Moraga
Hurricane Impact Windows
In Moraga, hurricane impact windows do double duty. They carry the multi-pane tempered glass and fire-rated frames that Chapter R337 requires, and they also solve the thermal stress problem that the valley’s diurnal temperature swings create. Summer afternoons in Moraga regularly hit 95-105°F while the nights drop sharply. That cycle is brutal on single-pane aluminum. An impact-rated window with low-E double-pane glass and argon fill turns that daily expansion and contraction into a non-issue, and it passes inspection without argument.

Impact Sliding Glass Doors
If you have a 1970s ranch in Moraga, you probably have the signature sliding glass door of that era: aluminum frame, single pane, and rollers that bind every July. Here’s what most homeowners don’t know until the inspector tells them: that door explicitly fails HFHSZ replacement standards. You cannot just replace the rollers. You cannot just pop in a new pane. The entire assembly must be swapped for a Moraga Sliding & Patio Doors code-compliant unit with multi-pane tempered glass and a fire-rated frame. We quote these honestly and install them correctly the first time, which saves you the second inspection fee and the delay.

Impact Entry & French Doors
Many Moraga homes still carry the original hollow-core front doors and lightweight French door units from the 1970s and 80s. Those doors are thermally inefficient, and under HFHSZ replacement codes, they do not meet the fire-rated assembly standard. An impact entry or French door with a fire-rated frame and multi-pane tempered glass closes the code gap and changes how the house holds temperature, making Custom Windows & Doors in Moraga a smart investment. Given how sharply Moraga swings between cool damp mornings and scorching afternoons, that upgrade is measurable in both comfort and utility cost.

Impact Garage Doors
Garage doors are the weak point a lot of Moraga homeowners overlook. The original wood doors from the 1970s have warped and sagged after decades of valley moisture cycling toward the hills. An impact-rated garage door with a properly sealed threshold and fire-rated opening protection completes the envelope that Chapter R337 expects, and it is one less thing the inspector red-flags during a whole-house window and door project. Many homeowners also pair this with Moraga Glass Railing Systems for a complete exterior upgrade.

What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Moraga
We are an authorized installer for more than a dozen manufacturer lines, including PGT, CGI. On Camino Peral in Moraga, our techs pulled a 1978 aluminum-frame sliding glass door with a single pane that had failed HFHSZ inspection. We replaced it with a Milgard impact-rated sliding door using multi-pane tempered glass and a fusion-welded frame, and we had to rebuild the termite-damaged jamb and sill plate before we could set the new flashing tape and argon-filled insulated glass unit. That’s the kind of job that shows up when you’re already halfway in. We stock the common parts and hardware for Moraga’s housing stock, so we’re not waiting on a regional distributor for two weeks when your inspection is scheduled for Thursday. Both manufacturer warranty layers get registered in writing before we leave the driveway.
Common Impact Windows & Doors Problems We See in Moraga Homes
- Fogged glass that fails code. Fog between panes means the argon has escaped and the window’s insulation value is largely gone. In Moraga, that same fogged unit often fails HFHSZ replacement standards outright, so what looked like a simple reglaze becomes a full fire-rated assembly swap.
- Rotted jambs and sill plates. The valley’s moisture cycling, cool damp mornings followed by intense afternoon heat, has caused widespread wood rot in original jambs and sill plates across Moraga’s ranch homes. A pocket-insert job set into a rotted jamb fails structurally within a few years, so we convert these to full frame-out replacements with pressure-treated or composite bucks.
- Sticky or failed sliding door rollers. If the door is original 1970s aluminum with a single pane, new rollers will not fix the compliance problem. The whole assembly must go. We tell homeowners this before they spend money on a repair that will not pass inspection.
- Seal failure from thermal cycling. Moraga’s sharp diurnal swings accelerate seal failure in older insulated glass units. Once the seal fails, condensation forms inside the panes, and the window’s low-E performance drops fast. Impact-rated units with properly sealed argon fills hold up far longer in this specific climate.
Pricing for Impact Windows & Doors in Moraga, CA
For a code-compliant impact window in Moraga, you’re looking at roughly $1,100 to $2,400 per opening installed, including the fire-rated frame, multi-pane tempered glass, and the frame-out work that most older Moraga homes require. An impact sliding glass door on a 1970s ranch typically runs $4,200 to $7,800 depending on width, frame condition, and whether the jamb and sill plate need rebuilding. Impact entry doors start around $3,500 installed and go up from there with fire-rated framing and hardware. These are higher than what you’d pay in Lafayette or Orinda because those towns are not inside the HFHSZ boundary, so their code baseline is lower. In Moraga, the code requirement is not optional, and the cheap inland-spec bid becomes a failed inspection and a redo. We give written, line-item quotes so you see exactly what you’re paying for, and we register both warranty layers before we leave. Call (888) 635-0804 for a free estimate.
We Also Serve Cities Near Moraga
While we do most of our work right here in Moraga, our crews also serve Orinda, Walnut Creek, Lafayette, and Alamo. If you have family in a neighboring town asking about Impact Windows & Doors, there’s a good chance we already cover their street. The code requirements differ town to town, and we’ll tell them what their local inspector expects, not just what the manufacturer’s brochure says.
Serving Moraga, CA - Our Local Coverage Area
We’re based in the Moraga 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 - Impact Windows & Doors in Moraga
Yes, in most cases you do. The Cal Fire High or Very High Fire Hazard Severity Zone boundary covers almost the entire town of Moraga, not just the hillside parcels. If your home is inside that zone, any replacement window or door must meet Chapter R337 fire-resistant standards, which means multi-pane tempered glass and fire-rated frame assemblies. Your address is the deciding factor, and we can check it for you before you spend a dime. Call (888) 635-0804 and we’ll confirm what applies to your street.
Because under Chapter R337, the original 1970s aluminum-frame, single-pane sliding glass door fails the replacement standard outright. The entire assembly must be replaced with a code-compliant unit, not repaired. Any contractor who replaces just the rollers or the pane is leaving you with a non-compliant door that will get flagged the next time an inspector looks at your house. We’ll pull it and set a proper impact-rated door with a fire-rated frame, and we’ll register both warranty layers before we leave the driveway.
Moraga’s enclosed valley traps heat, so a summer day can swing from a cool, damp 55°F morning to a 100°F afternoon. That daily expansion and contraction stresses the seals on insulated glass units, and over years it forces the argon out and lets moisture in. Once the glass is fogged between the panes, the window’s insulating performance is largely gone. Impact-rated units with properly sealed argon fills and low-E coatings are built for exactly this kind of thermal cycling, and they hold up far longer in Moraga’s specific climate.
You can, but in Moraga it’s usually a mistake. The valley’s repeated moisture cycling has rotted a lot of the original jambs and sill plates in 1960s and 70s homes, and a pocket-insert set into a rotted jamb will fail structurally within a few years. The correct job is a full frame-out replacement with a pressure-treated or composite buck, and in an HFHSZ, that’s also the only approach that meets Chapter R337. We’ll cut back the rot, set the buck, and install a code-compliant unit that will not sag or bind.
Because Moraga sits inside Cal Fire’s High or Very High Fire Hazard Severity Zone, and Lafayette sits largely outside it. The HFHSZ designation means Moraga replacements require multi-pane tempered glass, fire-rated frame assemblies, and properly sealed fire-resistant penetrations, none of which are baseline requirements in Lafayette. The materials are more expensive, the installation takes longer, and the inspection standards are tighter. That’s the price difference in a nutshell. We show both the Moraga-spec and the inland-spec numbers side by side on paper so you see exactly where the money goes. Call (888) 635-0804 for a written quote and a free estimate.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving Moraga with code-compliant impact windows and doors and the belief that if the pane is not true, the job is not done.



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