Window Climate Specs for Jackson, CA
Jackson sits in IECC climate zone 4B, which sets the energy-performance bar for any window installed here. Below that, a short list of Jackson's longest-licensed window contractors can turn a spec into an actual installed window.
Licenses checked · California Contractors State License Board
4BIECC climate zone · ENERGY STAR North-Central zone
What zone 4B means for a Jackson window
Jackson falls in IECC climate zone 4B, and ENERGY STAR separately groups Amador County into its North-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 Jackson.
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.
Storm and weather risk around Jackson
FEMA scores Amador County's winter-weather risk as Relatively High and its flood risk as Relatively Low.
Winter risk in Jackson 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 Jackson contractor, not one.
- Strong wind
- Very Low
- Winter weather
- Relatively High
Data: FEMA, National Risk Index for Natural Hazards - County-level table, v1.20 (v1.20, December 2025).
Guides to finish before Jackson 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 Jackson
Oldest license first, newest last, pulled directly from the state's file. This list isn't for sale.
- Stonemill ConstructionVerify license
- Gold Country GlassVerify license
- Glass Doctor Of The Gold CountryVerify license