Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
Fast, Reliable Door Installation Across Lomita
Door installation in Lomita, CA usually means one of two things: either the original 1950s or 1960s door has finally given out, or a homeowner is planning to stay and wants something that actually seals against the harbor air. We’ve worked on hundreds of doors in the 90717 ZIP, and the pattern is consistent. Salt-laden marine air from the Port of Los Angeles gets into aluminum tracks and frames, the rollers grind themselves into gritty paste, and a repair that would hold up fine in Lakewood or Torrance simply won’t last here. A typical entry door replacement in Lomita runs $1,400 to $3,800 depending on material and whether the rough opening needs correction. A full sliding patio door replacement typically lands between $2,200 and $5,500. If you’re weighing options, call (888) 635-0804 and we’ll walk you through what your specific opening actually needs.
Key Takeaways for Lomita Homeowners:
- Original aluminum doors in Lomita’s 1950s-60s tract homes corrode faster than those in drier South Bay cities, so full-frame replacement is often the only durable fix.
- Pre-hung doors frequently bind or leak in Lomita because original openings are undersized or out of square.
- TruePane registers both manufacturer warranty layers in writing before the truck leaves your driveway, and every job carries the Done Right Promise.
- Free estimates are provided on paper, with line-item pricing. No surprise change orders.
Why TruePane Windows & Doors Is Lomita’s Preferred Door Installation Company
We’re known in Lomita for something specific: we tell homeowners the truth about what’s behind their old door before the first wall is opened. Dale Kessler founded TruePane in 2008 on a rule that still hangs in the shop: if the pane is not true, the job is not done. That same rule applies to every door we hang, shim, flash, and trim in Lomita.
Lomita homeowners have told us the same thing after a dozen different jobs. Other companies quoted a pocket insert for a corroded aluminum slider, swapped the panel, and left. The new rollers failed within two years because the track was already compromised. We don’t do that. When we look at a door on a Lomita ranch or bungalow, we inspect the frame, the rough opening, the threshold flashing, and the track condition before we recommend anything. If a repair won’t last, we say so and show you why.
Every TruePane technician is background-checked and uniformed. They measure every opening twice. They quote manufacturer lines side by side on paper so you can see exactly what you’re paying for and what the warranty covers. And because we’ve been building our reputation in this community since 2008 through the Kessler family’s trade lineage, we plan to answer the phone when you call about that door ten years from now. A live person answers 24 hours a day, seven days a week. Not a voicemail tree. Not a callback form.
Our Door Installation Services in Lomita
Entry & Swing Doors
Entry doors in Lomita take a beating. The prevailing marine layer pushes salt air against west-facing exposures, and we regularly see steel doors with rust at the bottom rail and wood doors with jambs softened by moisture wicking up from unflashed thresholds. We install fiberglass, steel, and wood entry doors sized to your opening, with new flashing, drip cap, and sill pan. If your existing rough opening is out of square, which is common in the tract homes around Eshelman Avenue and 247th Street, we correct the framing before the door goes in.

Double & French Doors
Original aluminum French doors from the 1960s are a Lomita signature. They leak air, the seals are long gone, and the frames are typically pitted from decades of salt exposure. We replace them with modern double French doors from Milgard, Andersen, or Pella, set into corrected openings with full sill flashing. Homeowners near Lomita Park and the neighborhoods off Narbonne Avenue tell us the difference is immediate: no more draft, no more condensation between the panes, and the doors actually swing closed in July.

Bifold & Folding Doors
Bifold and multi-panel folding doors open up the smaller floor plans common to Lomita’s post-WWII housing stock. These homes were built tight and efficient for their era, but that means indoor-outdoor flow is usually limited to one sliding door. A folding door system across the back wall of a bungalow off Oak Street changes how the whole house lives. We set the structural header, flash the opening, and install the panels on level tracks so they operate smoothly from day one.

Pivot Doors
Pivot doors are one of the few places a Lomita homeowner can add real architectural character without expanding the footprint. A properly hung pivot door needs a reinforced rough opening and precise hinge geometry, which is exactly the kind of work that goes wrong when someone treats it like a standard pre-hung. We’ve corrected pivot doors in Lomita homes where the original installer used undersized anchors and the door sagged within a year. Ours don’t.

What happens when you call
- 1
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 Lomita
TruePane is an authorized installer for more than a dozen manufacturer lines, and for Lomita’s salt-air conditions we typically recommend, or because their frame and hardware finishes hold up better against coastal oxidation. We keep common components and hardware for those brands in local stock, which means faster turnaround when your quote turns into a scheduled install. We quote manufacturer lines side by side on paper so you see the price difference and the warranty difference before you commit. The Keystone Standard means both warranty layers get registered in writing before the truck leaves your driveway.
Common Door Installation Problems We See in Lomita Homes
Here’s what we actually find when we open up a door opening in Lomita. This page exists so you know what to expect before the first wall is opened.
- Corroded aluminum frames and destroyed rollers. The 90717 ZIP sits close enough to the Port of Los Angeles that window tracks and door hardware collect a gritty paste of salt residue and diesel soot. That paste grinds original 1960s aluminum sliding door rollers into dust within a few years of any repair. Full-frame replacement is almost always the right call over repairing the existing track.
- Undersized and out-of-square rough openings. Lomita’s tract homes were built fast between 1945 and 1970. Original door openings are often an inch or more out of square, which means a new pre-hung door binds, leaks, or won’t latch until the framing is corrected. We allow for that correction in the quote rather than surprising you mid-job.
- Failed waterproofing and missing flashing tape. Thresholds on original doors frequently have no sill pan and no flashing tape up the jambs. Decades of marine moisture wick into the wall cavity and rot the jamb. Once walls are open, that rot triggers permit-mandated code upgrades to the surrounding wall assembly, including Title 24 energy compliance and, in some cases, electrical or insulation corrections.
- Fogged seals on original single-pane aluminum doors. If your double-pane glass has condensation between the panes, the seal failed. On Lomita’s 1950s aluminum doors, replacement glass retrofits into a frame that’s already corroding. We’ll show you the frame condition at the quote appointment and explain whether glass replacement or full-frame replacement is the better use of your money.
Pricing for Door Installation in Lomita, CA
Here are realistic ranges for Lomita’s market, based on the doors we’ve actually installed in the 90717 ZIP:
- Entry door replacement: $1,400-$3,800 for a standard fiberglass or steel door. Higher for solid wood or custom sizing.
- Double or French door replacement: $2,400-$6,200 depending on material, width, and framing correction needed.
- Sliding patio door replacement: $2,200-$5,500 for a full-frame Milgard or Andersen slider with new flashing and sill pan. Pocket inserts cost less but rarely last in Lomita’s salt air.
- Storm door installation: $400-$1,100 including hardware and proper threshold sealing.
- Bifold or folding door system: $4,000-$12,000 depending on panel count and structural header requirements.
- Pivot door installation: $3,500-$8,500 including reinforced rough opening and precision hardware.
What moves the price in Lomita is framing correction. If your rough opening is out of square, undersized, or has moisture damage, we write that allowance into the contract upfront. The quote includes the framing work as a line item. If we find additional issues once the wall is open, we price them and get your written approval before we touch anything. No surprise line items at the end. Every job includes our Done Right Promise and The Keystone Standard warranty registration. Call (888) 635-0804 to schedule a free estimate at your Lomita home.
We also offer a standing $50 discount on any repair over $250, a maintenance check, and a permanent 5% discount for seniors and veterans in Lomita.
We Also Serve Cities Near Lomita
Our crews cover all of Door Installation in Lomita and the surrounding area, including Lakewood, Torrance, Carson, and Rancho Palos Verdes. If you’re in one of those cities, the same Door Installation team serves you with the same warranty registration and Done Right Promise. Call (888) 635-0804 and tell us where you’re calling from. We’ll get you scheduled.
Serving Lomita, CA - Our Local Coverage Area
We’re based in the Lomita 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 Lomita
Lomita’s rollers fail quickly because the track fills with a gritty paste of salt residue and diesel soot from the Port of Los Angeles. That paste acts like sandpaper on the rollers. A repair replaces the roller but leaves the corroded track and the source of the grit, so the new roller grinds down within a few years. Full-frame replacement with new track and hardware is the durable fix. We’ll show you the track condition at the quote. Call (888) 635-0804 for an exact assessment.
We regularly find rough openings that are out of square by half an inch to a full inch, undersized header framing, and jambs softened by decades of moisture from unflashed thresholds. On a 1950s ranch home near Lomita Park, our crew replaced an original aluminum sliding patio door and found the rough opening out of square by nearly an inch. The corrosion had eaten through the bottom rail. We reframed, flashed the sill, and installed a new Milgard slider so the harbor moisture stays out for good. We write framing correction into the quote upfront so you never face an unapproved change order. Call (888) 635-0804 for a free written estimate.
Yes, in many cases. Once a door opening is exposed and we find moisture damage, rot, or framing that no longer meets current code, the city requires correction to California Title 24 energy compliance and current structural standards. That can include upgrading insulation, adding proper flashing and moisture barriers, and sometimes addressing adjacent electrical runs. We pull permits, schedule inspections, and pass them. The permit work is included in your written quote. If we find something unexpected, we price it and get your approval in writing before proceeding. Call (888) 635-0804 to talk through what applies to your home.
Pocket inserts slide a new panel into the existing frame, which means the old corroded frame, worn track, and failed flashing all stay in place. In Lomita’s salt-laden air, those existing components are already compromised. The insert looks good for a year or two, then the same problems return. Full-frame replacement removes the old frame, exposes any moisture damage, corrects the rough opening, installs new flashing and sill pan, and gives you a door that will perform for decades. Call (888) 635-0804 and we’ll show you the difference at your quote appointment.
Condensation between the panes, a milky or hazy appearance in the glass, drafts you can feel at the door edge, and doors that bind or won’t close flush in summer are all signs of seal failure. Underlying frame corrosion is usually along for the ride. We’ll inspect the glass, frame, and rough opening before making a recommendation, and we’ll walk you through your options on paper. Estimates are free. Call (888) 635-0804 to schedule.
Written by Dale Kessler, founder and second-generation glazier at TruePane Windows & Doors.



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