Maywood's Climate Data and Its Top-Rated Window Pros
ENERGY STAR groups Los Angeles County into its South-Central zone, the U-factor and SHGC target worth checking against any quote you get in Maywood. Below that spec discussion sit 7 installers, their order set by Google rating, since Maywood is outside this site's window license file. A high rating is worth a look, not a finished decision.
Google Maps ratings checked · How we rank
3BIECC climate zone · ENERGY STAR South-Central zone
Maywood's climate zone, in plain terms
Maywood falls in IECC climate zone 3B, and ENERGY STAR separately groups Los Angeles County into its South-Central zone for window certification.
Those two numbers, not the brand on the box, set the U-factor and SHGC worth checking on any quote you get in Maywood.
A Los Angeles-Long Beach-Anaheim, CA contractor who can't name either one on request is worth a second question before you sign.
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 5.1 mi away.
What FEMA's risk data says about Maywood
FEMA scores Los Angeles County's winter-weather risk as Relatively Moderate and its flood risk as Very High.
Winter risk in Maywood 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 Maywood 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 Maywood 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.
Maywood's top-rated window installers, by Google
The order below weighs a Google rating against its review count, the same way this site weighs a U-factor against a brochure claim: on the number, not the name. Treat it as a rating, never as proof of a license, bond or HVHZ approval.
- Reliance Development and Construction Inc.Google reviews
- 3B Windows & DoorsGoogle reviews
- Bell's Glass ShopGoogle reviews
- United Glass and WindowsGoogle reviews
- GM Windows and Doors, Inc.Google reviews
- Colima Glass & Window Corp.Google reviews
- J & A WindowsGoogle reviews