What Tracy Homes Need From a Replacement Window

Tracy sits in IECC climate zone 3B, which sets the energy-performance bar for any window installed here. Below that, a short list of Tracy'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

What zone 3B means for a Tracy window

Tracy falls in IECC climate zone 3B, and ENERGY STAR separately groups San Joaquin 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 Tracy.

A Stockton-Lodi, 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 6.6 mi away.

Storm and weather risk around Tracy

FEMA scores San Joaquin County's winter-weather risk as Relatively Low and its flood risk as Relatively High.

Winter risk in Tracy 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 Tracy contractor, not one.

Strong wind: Relatively Low
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 Tracy 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 Tracy

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

S R G Windows INCWindow and glass contractor · licensed 14 years · 95376Verify license
Topline Shower Doors & Mirrors INCWindow and glass contractor · licensed 9 years · 95376Verify license
Prime Glazing INCWindow and glass contractor · licensed 9 years · 95304Verify license
Alexz Glass INCWindow and glass contractor · licensed 8 years · 95304Verify license
Commercial StorefrontsWindow and glass contractor · licensed 8 years · 95304Verify license
Platinum GlazingWindow and glass contractor · licensed 7 years · 95376Verify license
Larson's Precision GlassWindow and glass contractor · licensed 5 years · 95376Verify license
GGG Services INCWindow and glass contractor · licensed 4 years · 95304Verify license
FC Windows And Doors Glass CompanyWindow and glass contractor · licensed 2 years · 95377Verify license
Commercial Storefronts INCWindow and glass contractor · licensed 1 year · 95304Verify license
David Lopez DC Roadrunner GlassWindow and glass contractor · licensed under a year · 95376Verify license

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