Assessment and window selection
Existing frames, wall condition, glass type and operation are surveyed, and window material, operation and performance are chosen for each opening.
Open 24 hours · 7 days a week · Los Angeles
Window Replacement in Los Angeles
A replacement window is an envelope job: flashing, sealing, insulation and Title 24 performance, all of which decide whether the new window saves energy or leaks. This page explains what window replacement involves in Los Angeles homes, from retrofit inserts to full-frame replacements in period houses.
Careful work. Honest options.
About this service
Window Replacement in Los Angeles: What the Job Actually Involves
Window replacement removes old sashes or full frames and installs new windows — vinyl, fiberglass, wood or aluminium-clad — with flashing, insulation, sealing and trim finished to suit the wall. Retrofit inserts fit inside existing frames and suit sound frames; full-frame replacement removes the whole unit and suits rotted frames, changed sizes or period restoration. Replacement fenestration must meet current Title 24 U-factor and solar heat gain requirements for the climate zone, with labelled products.
Cost varies by window size, material, count, retrofit versus full-frame scope and wall condition; pricing is set out in a written estimate after the site visit. The scope below is what a written estimate should itemise instead: window type, installation method, flashing, insulation, trim and disposal.
- ✓ Title 24 U-factor and solar heat gain met
- ✓ Flashing and sealing as a system
- ✓ Retrofit versus full-frame chosen by frame condition
- ✓ HPOZ exterior review checked where it applies
What's included
What Window Replacement Covers
Window scopes range from a single retrofit insert to whole-house full-frame replacement. The stages below cover both.
Retrofit or full-frame decision
Sound frames suit retrofit inserts; rotted frames, size changes or period restoration suit full-frame replacement. The decision is made opening by opening.
Removal and opening preparation
Old sashes or frames come out, openings are checked for rot, level and square, and damaged framing or sill material is repaired.
Installation, flashing, insulation
New windows are set level, plumb and square, flashed to shed water, insulated at the gap, and sealed inside and out.
Trim and hardware
Interior and exterior trim are fitted, hardware is set, and windows are tested for operation, locking and weatherstripping.
Final check and care notes
Every window is operated, locked and checked for drafts and leaks, with care notes for the material and hardware left with the household.
How it works
How Window Replacement Runs, Step by Step
Openings are measured, frames and walls are assessed, and window material, operation and performance are chosen per opening.
The permit path and any HPOZ exterior review are checked for the parcel before ordering, since exterior window changes in an HPOZ need review.
Old windows come out, openings are repaired, and flashing details are planned for each wall type.
New windows are set, flashed, insulated and sealed, with trim fitted inside and out.
Every window is operated and locked, drafts and leaks are checked, and the finished job is walked against the written scope.
STEP 01Survey and selection
Openings are measured, frames and walls are assessed, and window material, operation and performance are chosen per opening.
Tools & methods
Tools and Methods We Bring to the Job
Opening measurement
Openings are measured at multiple points, since older Los Angeles walls are rarely square and a single measurement misleads ordering.
Flashing and sealing systems
Flashing tape, sill pans and sealant are applied as a water-shedding system, not as spot caulk after installation.
Levelling and shimming
Windows are set level, plumb and square with shims at framing points, so sashes operate and lock without binding.
Insulation at the gap
The frame-to-wall gap is insulated with material suited to the gap size, so drafts do not bypass the new window's performance.
Operation testing
Every sash, lock and weatherstrip is tested before handover, since a window that binds or leaks has failed its purpose.
Real results
What This Work Involves
Window Replacement
What window work involves in a Silver Lake home
Silver Lake window work in 1920s homes often means period-appropriate replacement — wood or clad windows that suit Craftsman and Spanish Revival openings — with full-frame scope where original frames have rotted.
Window Replacement
What window work involves in a Highland Park home
Highland Park window replacement in an HPOZ needs exterior review for visible changes, with window profiles, materials and glazing matched to the district's preservation expectations.
Where this work fits in Los Angeles: Silver Lake · Los Feliz · Highland Park · Sherman Oaks · Encino · Studio City.
Problems we solve
Window Problems That Surface During the Work
Window failures are flashing and fit failures. These are the problems to scope for.
Ask a pro →A window that leaks at the sill
Leaks trace to missing sill pans, poor flashing or sealant used as flashing. Water-shedding details come before trim, not after.
A window that binds or will not lock
A window set out of square binds and will not lock. Levelling, plumbing and squaring at installation prevent it.
Drafts that bypass a new window
An uninsulated frame-to-wall gap drafts around even a high-performance window. Insulation at the gap is part of installation.
An HPOZ window changed without review
In an HPOZ, exterior window changes need preservation review. Replacing first and seeking review later risks a reversal order.
Proof you can check
A Rating You Can Check
- 4.8-star aggregate rating — review text is shown on Google, with no review count published
- Open 24 hours · 7 days a week
- 352 W Martin Luther King Jr Blvd, Los Angeles, CA 90037
- Phone (424) 337-6597
Customer reviews
Reviews
Radiant Renovations Co. holds a 4.8-star aggregate rating. No review count is published here, and no individual review quotations are shown on this page — full review text is shown on Google.
Retrofit inserts suit sound existing frames and keep interior and exterior trim intact. Full-frame replacement suits rotted frames, size changes or period restoration, and it allows full flashing and insulation renewal.
Yes. Replacement fenestration must meet current U-factor and solar heat gain requirements for the climate zone, with labelled products. The exact values depend on the climate zone and the code edition in force on the permit date.
Window replacement in kind is often on the LADBS express-permit list, while size changes, structural changes or HPOZ exterior changes follow different paths. Confirm the scope and parcel against current LADBS rules.
Exterior window changes in an HPOZ need preservation review, with profiles, materials and glazing matched to the district. Interior-only work generally does not trigger HPOZ review.
Ready when you are
Talk Through Your Windows in Los Angeles
Call (424) 337-6597 to talk through your windows: retrofit or full-frame, material, performance and any HPOZ check for your parcel. Radiant Renovations Co. is open 24 hours, 7 days a week.
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Request an appointment
Talk To A Los Angeles Renovations Crew
Call (424) 337-6597 to talk through your project. Radiant Renovations Co. is open 24 hours, 7 days a week. Tell us what you want to change and we will talk through what it takes, including the permit path for the scope.
Call anytime(424) 337-6597
Office hoursOpen 24 hours · 7 days a week