What Union City Homes Need From a Replacement Window
Local risk and climate data for Union City, CA are below, translated into plain terms for a window buyer rather than left as raw codes. Use it to check a proposed spec before you sign, not just to browse.
Licenses checked · California Contractors State License Board
3CIECC climate zone · ENERGY STAR South-Central zone
What zone 3C means for a Union City window
Alameda County's normal precipitation runs about 15.9 inches a year, with 0.0 inches of snow, which is a separate question from energy performance but still shapes which window details matter in Union City.
Moisture and glass performance are handled by different parts of a window's spec sheet, and a Union City buyer benefits from checking both instead of assuming one implies the other.
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 4.2 mi away.
Storm and weather risk around Union City
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 Union City home.
Ask specifically about design pressure and impact rating for Union City, not just energy performance, if either risk rating comes back on the high side.
- Strong wind
- Very Low
- Winter weather
- Very Low
Data: FEMA, National Risk Index for Natural Hazards - County-level table, v1.20 (v1.20, December 2025).
Guides to finish before Union City 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 Union City
Oldest license first, newest last, pulled directly from the state's file. This list isn't for sale.
- Aufdermauer Enterprises INCVerify license
- The Glass CompanyVerify license
- Glass Doctor Of Bay AreaVerify license