What Atwater Homes Need From a Replacement Window
Atwater sits in IECC climate zone 3B, which sets the energy-performance bar for any window installed here. Below that, a short list of Atwater's longest-licensed window contractors can turn a spec into an actual installed window.
Licenses checked · California Contractors State License Board
3BIECC climate zone · ENERGY STAR South-Central zone
Atwater's climate zone, in plain terms
Merced County's normal precipitation runs about 12.5 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 Atwater.
Moisture and glass performance are handled by different parts of a window's spec sheet, and a Atwater 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 6.1 mi away.
What FEMA's risk data says about Atwater
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 Atwater home.
Ask specifically about design pressure and impact rating for Atwater, not just energy performance, if either risk rating comes back on the high side.
- Strong wind
- Relatively 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 Atwater 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.
Atwater's longest-licensed window installers
Oldest license first, newest last, pulled directly from the state's file. This list isn't for sale.
- R Touch Of GlassVerify license
- JDL Glass IncorporatedVerify license
- Atwater GlassVerify license