What Gardena Homes Need From a Replacement Window

Gardena sits in IECC climate zone 3B, which sets the energy-performance bar for any window installed here. Below that, a short list of Gardena's longest-licensed window contractors can turn a spec into an actual installed window.

Licenses checked September 30, 2026 · California Contractors State License Board

3BIECC climate zone · ENERGY STAR South-Central zone

Gardena's climate zone, in plain terms

Moisture and glass performance are handled by different parts of a window's spec sheet, and a Gardena buyer benefits from checking both instead of assuming one implies the other.

Data: U.S. EPA / DOE, ENERGY STAR, ENERGY STAR Version 7.0 Climate Zones by County/ZIP (Windows, Doors, and Skylights) (V7.0); Pacific Northwest National Laboratory (DOE Building America), Guide to Determining Climate Zone by County: Building America and IECC 2021 Updates (PNNL-33270) (2021 IECC), from the nearest NOAA station 2.5 mi away.

What FEMA's risk data says about Gardena

FEMA scores Los Angeles County's winter-weather risk as Relatively Moderate and its flood risk as Very High.

Winter risk in Gardena weighs on U-factor and condensation resistance; flood risk weighs more on sill height and drainage detailing than on the glass package.

Treat these as two separate conversations with a Gardena contractor, not one.

Strong wind: Relatively Moderate
Winter weather: Relatively Moderate

Data: FEMA, National Risk Index for Natural Hazards - County-level table, v1.20 (v1.20, December 2025).

Guides to finish before Gardena window bids come in

How to Read an NFRC Window Label Four numbers on one sticker decide most of a window's real-world performance. Here's what each one means.
ENERGY STAR Window Criteria by Climate Zone ENERGY STAR splits the country into four zones, each with its own numbers. Here they are, and why the Northern zone works backward from the other three.
Impact Windows vs. Shutters in Florida's Hurricane Zones Florida gives homeowners two paths to a protected opening. Here's how each one is tested, and where the HVHZ raises the bar further.

Gardena's longest-licensed window installers

Oldest license first, newest last, pulled directly from the state's file. This list isn't for sale.

Metcoe Skylight SpecialtiesWindow and glass contractor · licensed 73 years · 90249Verify license
Able Glass ServicesWindow and glass contractor · licensed 60 years · 90247Verify license
Best Contracting Services INCWindow and glass contractor · licensed 42 years · 90248Verify license
A G SWindow and glass contractor · licensed 39 years · 90249Verify license
No 1 Glass COWindow and glass contractor · licensed 35 years · 90249Verify license
S & J GlassWindow and glass contractor · licensed 34 years · 90248Verify license
Jack's Glass & Shower Doors INCWindow and glass contractor · licensed 27 years · 90249Verify license
Sonora Valley Windowworks INCWindow and glass contractor · licensed 21 years · 90248Verify license
Patriot Contracting INCWindow and glass contractor · licensed 18 years · 90248Verify license
Hangil Glass INCWindow and glass contractor · licensed 16 years · 90248Verify license
Able Maintenance ServiceWindow and glass contractor · licensed 13 years · 90247Verify license
A G S Hotel Renovation CorporationWindow and glass contractor · licensed 10 years · 90249Verify license

More California climate pages

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