Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
Sliding glass doors
Impact garage doorsPGTCGI
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AfterFast, Reliable Door Installation Across San Dimas
A new entry door or patio door in San Dimas typically runs $1,850-$6,400 installed, depending on the door type, frame condition, and whether your parcel sits in a Wildland-Urban Interface zone that requires fire-rated glazing. The bigger variable almost nobody budgets for is what we find when we pull the old door: rotted headers, missing flashing, warped jambs. We inspect before we quote, so the number we put on paper is the number you pay. Call (888) 635-0804 for a free estimate, and we’ll walk the opening with you before any pricing is finalized.
Why TruePane Windows & Doors Is San Dimas’s Preferred Door Installation Company
We’ve been working on San Dimas homes long enough to know what’s behind the stucco on a 1972 ranch off San Dimas Avenue: 2×4 framing, no sheathing, single-pane aluminum sliders with bent tracks, and door openings that were never flashed. None of that surprises us. We plan for it. Dale Kessler founded TruePane in 2008 on a rule that still governs every install: if the pane is not true, the job is not done. That means we measure every opening twice, register both manufacturer warranty layers in writing before the truck leaves your driveway, and back the workmanship for 90 days under our Done Right Promise with no paperwork fights.
San Dimas homeowners tend to stay put for decades. So do we. Our technicians are background-checked and uniformed, and they work in your home the way they’d work in their own mother’s. We’re an authorized installer for more than a dozen manufacturer lines, including, PGT, and we quote brands side by side on paper so you can see exactly what you’re paying for. No surprises on the bill. No second appointment left hanging. A live person answers our phone 24 hours a day, seven days a week, not a voicemail tree.
Our Door Installation Services in San Dimas
Entry & Swing Doors
Most San Dimas entry doors from the 1960s through the 1980s are steel or hollow-core wood units with aluminum thresholds that have been wicking moisture into the subfloor for years. We replace the full assembly: jamb, threshold, weatherstripping, and door with a factory-painted slab rated for CEC Climate Zone 10 heat. If your parcel on the upper foothill perimeter maps into a WUI zone, we’ll spec an SFM-listed fire-rated assembly from the start, so the permit doesn’t stall mid-job.
Double & French Doors
Double French doors are common on San Dimas ranch homes that open onto a back patio or the old orange grove views. The weak point is almost always the center astragal and the header above it. We verify header size before we order anything, because undersized or rotted headers over old sliding doors are one of the most common failures we find once the trim comes off. We also reset both active and passive panels so they latch without forcing, even when the afternoon heat swells the frame.
Bifold & Folding Doors
Hillside homes along San Dimas Canyon Road often have panoramic views worth opening up to, which is why we install multi-panel bifold and folding door systems there several times a year. Those openings are large, the header loads are real, and the glass must meet Title 24 SHGC requirements that are tighter here than in coastal markets. We engineer the opening properly the first time, with a reinforced header and a sill pan that actually drains, because water against a hillside foundation is not a minor problem.
Pivot Doors
For custom homes in the foothills above the 210, a pivot door makes a statement that a standard hinged door can’t. We’ve installed pivot systems up to 9 feet tall with custom glass and steel frames. The engineering has to be exact: pivot box placement, floor load transfer, and glass weight all have to be calculated before the slab is ordered. We measure twice and order once, and we register the warranty before we leave.
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 San Dimas
We stock and install PGT, Ply Gem, and CGI door lines, among others, because those manufacturers built products that hold up in San Dimas heat and meet the fire-rated and SHGC requirements that foothill parcels demand. We keep common slabs, thresholds, and weatherstripping in local inventory so a replacement doesn’t get held up waiting on a freight truck from Texas. If you’re comparing brands, we’ll put PGT and Ply Gem sides by side on paper with actual line-item pricing, glazing specs, and warranty durations. You decide. We install.
Common Door Installation Problems We See in San Dimas Homes
- Undersized or rotted headers over old sliding doors. On 1970s San Dimas tract homes, the original patio door header was often a 4×6 or a double 2×4 that’s now sagging. We discover it the moment we pull the drywall, and we reframe before we set the new jamb so the door doesn’t bind in six months.
- Aluminum-frame entry doors with no thermal break. An unpainted aluminum door in San Dimas can reach 120°F on the interior jamb on an August afternoon. That heat migration warps the latch alignment and makes the door stick. We replace with a thermally broken frame and adjust the reveal so the latch engages cleanly year round.
- Seal failure in adjacent sidelight insulated glass units. Day-to-night swings of 30-40°F in the foothills accelerate argon gas loss in sidelight IGUs. The fog is invisible until the old door comes out and the glass looks like a shower curtain. We quote a matching replacement before demo so you’re never without a front door.
- Missing flashing and failed caulk beads around original rough openings. On a 1970s ranch near San Dimas Canyon Road, our crew removed a warped aluminum sliding door and found bare wood where flashing tape should have been. The caulk was the only thing holding the water out. We now assume every original opening in San Dimas needs a sill pan and side flashing, and we write that into the quote.
Pricing for Door Installation in San Dimas, CA
Here are real numbers for San Dimas, based on the jobs we’ve done in the 91773 zip code over the last couple of years. A solid fiberglass or steel replacement entry door with a pre-hung jamb starts around $1,850 and runs to about $3,400. Double French doors land between $3,300 and $5,800 depending on glass package and frame work. A WUI fire-rated entry assembly adds $500-$1,200 over a standard door for the same opening, because the slab, frame, and glazing all must carry SFM listing. Bifolds start near $6,000 and go up from there with panel count and glass spec. If we find rot or a bad header, we stop, show you the framing, and get a written change order signed before we spend a dollar more. Call (888) 635-0804 and we’ll give you a line-item quote before the first tool comes off the truck.
We Also Serve Cities Near San Dimas
Our Door Installation crews cover San Dimas and the surrounding foothill communities: La Verne, Glendora, Covina, and Azusa. If you’re in one of those cities and need a door replaced, we’ll bring the same side-by-side quotes and the same Done Right Promise. You can also learn more about our local coverage on our San Dimas service page.
Serving San Dimas, CA - Our Local Coverage Area
We’re based in the San Dimas 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 - Door Installation in San Dimas
San Dimas requires a permit when you change the rough opening size, add a new opening, or replace a door on a hillside parcel that sits in a Wildland-Urban Interface overlay. A straight swap of the same size door in the same existing frame on a valley-floor home usually does not trigger a permit. We pull permits when they’re required and we handle the inspections. Call (888) 635-0804 and we’ll tell you whether your specific project needs one, based on your parcel and your door choice.
Your door sticks because San Dimas summer heat causes the frame, the jamb, and sometimes the slab itself to expand unevenly through the day. This is most common with solid wood doors and aluminum-frame units without a thermal break, which conduct heat into the interior side of the jamb and warp the latch alignment. A properly specified door with a thermally broken frame and the right reveal gaps won’t bind, even when the thermometer crosses 100°F. For an exact fix on your door, call (888) 635-0804 for a free estimate.
Sometimes, but rarely in San Dimas. If the existing frame is square, sound, and flashed correctly, a slab replacement can work. What we find on most 1960s ranch homes is a frame that has been wicking water for decades, with a rotted jamb at the bottom corners and no flashing tape behind the stucco. In that case, a slab swap is a band-aid that fails within a couple of years. We’ll inspect the frame and show you exactly what we find before we recommend a path. Estimates are free; call (888) 635-0804.
A WUI fire-rated entry assembly for a San Dimas hillside parcel typically costs $500-$1,200 more than a standard entry door for the same opening, because the slab, frame, and any glazing must carry SFM listing and the lead time for compliant units is longer. The price difference depends on the door material, the glass package, and the exact rating the parcel triggers. We quote both options side by side on paper, so you see the line items and decide with full information. Call (888) 635-0804 for an exact number on your specific door.
Yes, when the door contains glass and the project falls under a Title 24 compliance review, the glazed portion of the door must meet the same SHGC ≤ 0.22 threshold that applies to windows in CEC Climate Zone 10. That rules out some cheap clear-glass patio doors and pushes you toward low-E coated or spectrally selective glazing. On WUI parcels, you’ll need glass that meets both the SHGC rule and SFM fire-rating requirements, which narrows the field further. We carry PGT, CGI, and Ply Gem lines that satisfy both. Call (888) 635-0804 for a quote on a door that actually passes code in San Dimas.
TruePane Windows & Doors installs, replaces, and services doors throughout San Dimas, including San Dimas Canyon Road, the 91773 zip code, and every foothill parcel above the valley floor. If you’re pricing a door replacement in San Dimas, call (888) 635-0804 and ask for a free, line-item estimate. We’ll show you the door, the glass spec, the warranty durations, and the fire-rating if your parcel needs one, before any work begins.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving San Dimas and the surrounding foothill communities with craft-quality door installation since 2008.