What Redding Homes Need From a Replacement Window

ENERGY STAR groups Shasta County into its South-Central zone, which is the U-factor and SHGC target worth checking against any quote you get in Redding. The longest-licensed window contractors based in Redding are listed below the climate data.

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

3BIECC climate zone · ENERGY STAR South-Central zone

What zone 3B means for a Redding window

Redding falls in IECC climate zone 3B, and ENERGY STAR separately groups Shasta 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 Redding.

A Redding, 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 mi away.

Storm and weather risk around Redding

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

Winter risk in Redding 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 Redding contractor, not one.

Strong wind: Very Low
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 Redding 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 Redding

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

Nicolet Glass INCWindow and glass contractor · licensed 50 years · 96002Verify license
Clearly GlassWindow and glass contractor · licensed 36 years · 96003Verify license
Cornerstone Door COWindow and glass contractor · licensed 29 years · 96003Verify license
Builders Door & Window INCWindow and glass contractor · licensed 27 years · 96049Verify license
Moule's California Glass INCWindow and glass contractor · licensed 26 years · 96002Verify license
Western Glass & WindowWindow and glass contractor · licensed 18 years · 96003Verify license
The Glass Store INCWindow and glass contractor · licensed 11 years · 96002Verify license
Dawson HomesWindow and glass contractor · licensed 9 years · 96049Verify license
Peacock's Mobile Glass ServicesWindow and glass contractor · licensed 5 years · 96003Verify license
United GlassWindow and glass contractor · licensed 3 years · 96002Verify license
Shasta Building Supply LLCWindow and glass contractor · licensed 1 year · 96049Verify license
Glass MasterWindow and glass contractor · licensed under a year · 96001Verify license

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