Contractor fitting a new white vinyl window into a framed wall opening

Residential

Window/Door Replacement

Upgrading windows and doors is an essential way for homeowners to improve both the look and functionality of their homes. DECOMA Industries takes a.

Why window/door replacement

Custom Window and Door Upgrade Solutions

Upgrading windows and doors is an essential way for homeowners to improve both the look and functionality of their homes. DECOMA Industries takes a comprehensive approach to window and door replacement, ensuring that every project is carefully customized to fit the homeowner’s specific needs and preferences. These upgrades not only enhance energy efficiency, reducing heating and cooling costs, but also strengthen home security with modern, durable materials. Every installation is seamlessly integrated into the home’s existing architectural style, providing both aesthetic improvements and functional benefits. DECOMA focuses on delivering precision installations using high-quality materials, ensuring that the results are long-lasting, durable, and visually appealing.

What you get

Everything we deliver.

01
Full-frame & retrofit window install
Full-frame replacement when the existing window is failing structurally, retrofit (insert) when the existing frame is sound. We'll tell you honestly which one your house needs.
02
Vinyl, fiberglass, wood-clad & aluminum-clad
Vinyl for budget-conscious whole-house projects, fiberglass for premium energy performance, wood-clad and aluminum-clad for high-end homes that want the look. We work with Andersen, Marvin, Pella, Milgard, and Anlin.
03
Sliding, French, & multi-panel patio doors
Sliding glass, French swing, multi-panel folding (Marvin Multi-Slide, Andersen Big Doors, NanaWall) for indoor-outdoor flow. Common request on Manhattan Beach and Palos Verdes homes.
04
Entry doors & smart locks
Wood, fiberglass, and steel entry doors. Smart lock integration (August, Schlage Encode, Yale) tied to your home's existing security or smart-home system.
05
Title 24 energy compliance
California requires NFRC-rated windows with specific U-factor and SHGC values. We spec to comply — and the compliance also typically cuts utility bills 10-25% on whole-house replacements.

How we run it

Scope to sign-off.

01
Home walk-through & measure
Measure every opening, talk through brand and material preferences, identify any framing or stucco issues that need attention before install.
02
Permit & order
Permit pulled with your AHJ. Most South Bay cities require a permit for window and door replacement. Material lead time is typically 4-8 weeks.
03
Install
Tear-out, install, weatherproof, trim, paint. Whole-house projects typically run 5-10 days on-site. We protect floors and adjacent walls, clean up every day.
04
Inspection & punch
City inspection signed, operate every window with you, adjust any hardware, leave touch-up paint and the manufacturer's warranty paperwork.

Why DECOMA

One license, three disciplines, forty years.

Family-run South Bay general contractor since 1978. We design, build, and manage — under one license — so the team you start with is the team that hands you keys and the team that answers the phone when something needs fixing in year ten.

Years building: 48+
Projects delivered: 3,000+
Repeat clients: 300+
CSLB Class: A/B

FAQ

Common questions.

How long does whole-house window replacement take?

Single-family home with 15-20 windows: typically 5-8 days of install work, plus 4-8 weeks of manufacturer lead time on the windows themselves. Most homeowners stay in the house during install — we replace one or two windows at a time so the house stays sealed up.

Should I do retrofit (insert) or full-frame replacement?

If your existing frames are sound and the window is just old/inefficient: retrofit. If you have water damage, rot, sash that won't slide, or you want to change window size: full-frame. Retrofit is faster and cheaper; full-frame is more thorough and lasts longer. We'll tell you honestly which makes sense for your home.

What about Title 24 energy compliance?

California requires NFRC-rated windows meeting U-factor and SHGC values per your climate zone (most South Bay is Zone 6). We spec to comply automatically — and most homeowners see 10-25% utility bill reduction on whole-house projects.

Do you handle large patio doors and multi-slide systems?

Yes — we install Marvin Multi-Slide, Andersen Big Doors, NanaWall, and Western Window Systems folding/sliding patio doors regularly. These are popular on Manhattan Beach, Hermosa Beach, and Palos Verdes ocean-facing homes.

How much does window replacement cost in the South Bay?

Vinyl retrofit: typically $500-900/window installed. Fiberglass full-frame: $1,200-2,500/window. Wood-clad premium: $2,500-5,000+/window. Whole-house: $15K-60K depending on count and material. We quote your specific home, not a per-window average.

What about coastal salt-air exposure?

Salt air is hard on aluminum-clad windows within a mile of the ocean. For oceanfront Manhattan Beach, Hermosa Beach, and Palos Verdes homes, we recommend fiberglass or vinyl exterior with wood interior — same look, much better salt-air resistance.

Service areas