Double hung
Horizontal roller
Casement
Bay & bow
Sliding glass doors
Entry doors
Impact garage doors
PGT
CGIFree in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
Get your free estimateFast, Reliable Door Installation Across Duarte
Door installation in Duarte usually costs between $950 and $4,800 depending on the door type and what the existing opening reveals once the old frame comes out. If you’re also considering our Window Installation in Duarte, we can coordinate both projects together. For most homes in Duarte, a standard exterior door replacement with a quality Therma-Tru or ViewLux unit runs $1,400 – $3,200, while sliding glass door work on those original 1950s-70s patios typically lands between $2,100 and $4,800. We coordinate scheduling from our Los Angeles office and send crews into Duarte every week, so we know the streets, the housing stock, and the specific ways these older homes fight back when you open a wall. Call (626) 628-2308 for a free estimate and we’ll give you a written price before anything gets touched.
Why Lightwell Windows Pasadena Is Duarte’s Preferred Door Installation Company
Keith Yamada leads our crew, and he’s walked enough Duarte homes to know that the door you see from the street is rarely the whole story. What’s behind the stucco matters more, and that’s where we earn trust. We’ve replaced sliders on Royal Oaks Drive near the high school, front entries in the older bungalow pockets near Duarte Road, and French doors overlooking the foothills off Huntington Drive. Homeowners keep calling us back because we write the price down before we start, we show up in uniform with shoe covers and drop cloths in hand, and we explain what we found when we opened the wall instead of handing over a surprise invoice at the end.
We’re part of the Cedarwell network, operating under the Cedarwell Care Promise since 2010. That’s not a marketing slogan. It means a live person answers our phone 24/7, every price goes in writing before work begins, and the 365-Day Done Right Promise applies to every job, not just the easy ones. If the finished work isn’t right, we make it right. No debate, no countdown. Duarte homeowners who’ve been burned before – the ones who had a crew leave dust on the floors or add $600 at the end without asking – those are the people who appreciate what we do.
Styles & brands we work with
Sliding Glass Door Installation in Duarte
Sliding Glass Door Installation in Duarte is the service we field more calls about than any other, and it’s because of a quirk in the city’s housing stock: many original 1950s-70s patio sliders were built as non-standard 5-foot by 4-foot openings. A sliding glass door replacement in Duarte typically runs $2,100 – $4,800, with the higher end covering framing upgrades, impact-rated glazing, and new flashing details. Before we quote a slider, we inspect the rough opening, check the header size, and look for rot at the jamb. On Mount Olive Drive, we pulled an original aluminum slider whose jamb had rotted where sprinkler overspray had wicked behind the stucco; our tech removed the entire frame, reframed the opening with pressure-treated lumber, and installed a Therma-Tru sliding glass door with impact-rated glazing and a Miami-Dade NOA, then flashed and sealed it so Santa Ana gusts no longer rattled the sash. That’s the difference between swapping a panel and doing the job right.
Framing and Header Upgrades
Many Duarte sliders sit under undersized 2×4 headers that deflect when the Santa Ana winds push against the glass, and that’s why some doors bind at the latch or leak at the sill. Current building code requires a properly sized header and safety glazing for any opening that’s being replaced. We handle that as part of the quote, not as a surprise change order after we’ve cut into the wall.
Impact-Rated and Dual-Pane Options
Duarte sits in the path of seasonal Santa Ana gusts that can rattle single-pane glass and make a slider feel flimsy. We spec dual-pane, low-E glass with impact-rated options from PGT and CGI when the opening faces the foothills or takes direct wind exposure. The right glass also cuts UV damage to furniture and keeps the interior cooler through the San Gabriel Valley’s hot, dry summers.
Door Repair in Duarte
Door Repair in Duarte usually costs between $180 and $850 depending on what’s actually wrong, and most repairs are done in a single visit. The most common calls we get are for sliders that bind only when the wind blows, entry doors that sag and scrape the threshold, and exterior door pans that let winter rain track under the sill. A sticking slider on a 1960s home is rarely just a roller problem; more often it’s the undersized header flexing under wind load, which pinches the jamb and misaligns the track. We diagnose the cause before we touch anything, and the price you approve is the price you pay.
Rot Repair and Sill Flashing
Original exterior door pans in Duarte homes were often set without proper sill flashing, which means rain from the San Gabriels seeps under the threshold and rots the subfloor over time. When we find that, we cut out the damaged wood, reframe with pressure-treated lumber, and install a proper pan and flashing detail before resetting the door. Leaving rot in place just means replacing the door again in five years.
Condensation and Thermal Break Issues
Aluminum door frames without a thermal break form condensation on the interior jamb during valley heat, which stains drywall and can promote mold around the opening. If your door frame sweats in August or the drywall below the sill is discolored, that’s the tell. The fix is usually a new door with a thermally broken frame, and we’ll show you the difference in person, not in a brochure.
Trusted Brands We Service in Duarte
We carry Therma-Tru, ViewLux, PGT, and CGI among our eight manufacturer lines, and we keep common parts and hardware for Duarte’s older door openings in stock so turnaround stays short. Therma-Tru is our go-to for entry doors on mid-century homes, while PGT and CGI give us impact-rated sliding and French door options that handle Santa Ana wind loads. If you already have a door brand you like, we’ll service it, and if you’re replacing a builder-grade unit, we’ll match the recommendation to the home instead of pushing whatever’s in the warehouse. Our technicians pick the product that fits the opening, the exposure, and your budget, and every one of them comes with the 365-Day Done Right Promise.
See the difference
Before
After
Before
After
Before
AfterCommon Door Installation Problems We See in Duarte Homes
- Undersized 2×4 headers over 5-foot sliding door openings. These deflect under Santa Ana wind loads, causing the jamb to pinch and the door to bind or leak. A door that only sticks when the wind blows is almost always a header problem, not a roller problem.
- Missing sill flashing on original exterior door pans. Winter rain from the San Gabriels tracks under the threshold and rots the subfloor. By the time the floor feels soft, the damage is usually bigger than the homeowner expected.
- Aluminum frames with no thermal break. These sweat on the interior jamb during valley heat, staining drywall and feeding mold growth around the opening. The stain is the symptom; the failed frame is the cause.
- Non-standard rough openings from the 1950s-70s building boom. Many Duarte homes have door openings that don’t match today’s standard sizes, so a replacement requires custom sizing or a framing adjustment. We measure the actual opening, not the old door, before we order anything.
Pricing for Door Installation in Duarte, CA
Here’s what you can expect in Duarte right now. A standard single entry door replacement runs $1,400 – $3,200 installed. Sliding glass door replacement on a mid-century patio typically lands between $2,100 and $4,800, with impact-rated glazing and framing upgrades at the upper end. French or double door installation runs $2,400 – $5,600 depending on width and glass package. Storm and security doors start around $400. What moves the price: whether the header needs upgrading to meet current code, whether the rough opening is non-standard, and whether we find rot or failed waterproofing once the old frame comes out. We write every one of those numbers down before we start, and you approve any change in writing before we touch it. Call (626) 628-2308 to schedule a free estimate.
We Also Serve Cities Near Duarte
Our Door Installation crew covers Duarte and the surrounding foothill communities, including Monrovia, Arcadia, Temple City, and El Monte. If you’re in one of those cities, the same written pricing, shoe covers, and 365-Day Done Right Promise apply. We know Door Installation in Duarte best, but we’re on the road across this part of the San Gabriel Valley every week, and scheduling is simple.
Serving Duarte, CA - Our Local Coverage Area
We’re based in the Duarte 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 About Door Installation in Duarte
Your door binds during Santa Ana wind events because the original 2×4 header over the 5-foot opening is undersized and deflects under lateral wind pressure, which pinches the jamb and throws the rollers out of alignment. The fix is a framing upgrade to a properly sized header, not just new rollers, and it’s a repair we handle regularly in Duarte. Call (626) 628-2308 and we’ll inspect the opening before recommending anything.
Replacing a sliding door in an older Duarte home triggers current code requirements for header size, safety glazing (tempered glass in any door or adjacent panel), and proper sill flashing. If the existing header is undersized or the old door lacks tempered glass, those items must be brought up to code as part of the permit. We handle the permit, the inspection, and the upgrades, and we write the cost into your quote before work begins.
When we find rot behind an old Duarte patio slider, we remove the entire frame, cut out all damaged wood, reframe the opening with pressure-treated lumber, and install a proper pan and flashing detail before setting the new door. You approve the scope and price in writing before we cut anything. The alternative, covering rot with a new door, just guarantees the problem comes back.
For a like-for-like front door replacement that doesn’t change the rough opening, Duarte generally does not require a permit. If the opening size changes, the header is altered, or structural framing is involved, a permit is typically required and we pull it for you. We’ll tell you at the estimate stage whether your job needs one, and the permit cost is always in your written quote.
On a Duarte stucco home, the correct flashing detail for a sliding door includes a sill pan that slopes to the exterior, flexible flashing tape up the jamb sides, and a head flashing that directs water out over the stucco rather than behind it. Most original mid-century installations skipped the sill pan entirely, which is why subfloor rot is so common. The right door is only as good as the flashing around it, and we treat those two as one job.
Ready to get a written price for your door installation in Duarte? Call (626) 628-2308 and Keith or one of our team members will schedule your free estimate. We’ll measure the opening, check the framing, and give you a line-by-line quote before you decide anything. Shoe covers on, drop cloths down, price in writing. That’s how we work.
Written by Keith Yamada, Owner at Lightwell Windows Pasadena, serving Duarte since 2010.
Six Reasons Homeowners Choose Lightwell Windows Pasadena
Laminated glass and reinforced frames hold up to wind-driven rain, hail and flying debris, so your openings stay sealed when the weather turns.
Low-E insulated impact glass from our manufacturer lines commonly cuts monthly cooling bills 20-30%.
Laminated impact glass shuts out up to 40% of outside noise - traffic, neighbors, weather.
Monitoring services run $30-90 a month. Laminated impact glass resists forced entry around the clock, with no subscription.
Tighter seals and insulated glass even out hot and cold rooms and stop the drafts at the frame.
A full impact package upgrades curb appeal, buyer confidence and appraised value in one project.