Window Climate Specs for Alpine, CA
ENERGY STAR groups San Diego County into its South-Central zone, which is the U-factor and SHGC target worth checking against any quote you get in Alpine. The longest-licensed window contractors based in Alpine are listed below the climate data.
Licenses checked · California Contractors State License Board
3BIECC climate zone · ENERGY STAR South-Central zone
What zone 3B means for a Alpine window
Alpine falls in IECC climate zone 3B, and ENERGY STAR separately groups San Diego 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 Alpine.
A San Diego-Chula Vista-Carlsbad, 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 1.4 mi away.
Storm and weather risk around Alpine
FEMA rates San Diego County's hurricane risk as Very Low and its wind risk as Relatively Moderate.
Neither rating changes a window's energy label, but both are exactly what impact-resistance and design-pressure ratings are built to answer for a Alpine home.
Ask specifically about design pressure and impact rating for Alpine, not just energy performance, if either risk rating comes back on the high side.
- Hurricane
- Very Low
- Strong wind
- Relatively Moderate
- Winter weather
- Relatively Low
Data: FEMA, National Risk Index for Natural Hazards - County-level table, v1.20 (v1.20, December 2025).
Guides to finish before Alpine 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.
Window installers with the longest license records in Alpine
Oldest license first, newest last, pulled directly from the state's file. This list isn't for sale.
- Continental Glass & Mirror Of San DiegoVerify license
- J B Glass And MirrorVerify license
- San Diego Glass INCVerify license
- Get Glass INCVerify license
- KB GlazingVerify license