Red Oak's Climate Data and Its Top-Rated Window Pros
Red Oak sits in IECC climate zone 2A, which sets the energy-performance bar here no matter who ends up installing your windows. A window license file doesn't cover Red Oak on this site, so Google Maps supplies the 5 ranked names you see below. Checked September 2026.
Google Maps ratings checked · How we rank
2AIECC climate zone · ENERGY STAR Southern zone
What zone 2A means for a Red Oak window
Dallas-Fort Worth-Arlington, TX runs a January average near 45°F and climbs to about 84°F by July, a swing that adds up to roughly 2,431 heating degree days most winters, with 2,543 on the summer cooling side of the ledger.
That load is the actual argument for paying up for a better U-factor in Red Oak, separate from anything a brochure claims.
Zone 2A's requirement is the floor; Red Oak's specific load is what tells you whether beating that floor is worth the extra cost.
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 Red Oak
FEMA scores Ellis County's winter-weather risk as Relatively Moderate and its flood risk as Relatively Moderate.
Winter risk in Red Oak 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 Red Oak contractor, not one.
- Hurricane
- Very Low
- Strong wind
- Relatively 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 Red Oak 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.
5 top-rated window installers near Red Oak, TX
The order below weighs a Google rating against its review count, the same way this site weighs a U-factor against a brochure claim: on the number, not the name. Treat it as a rating, never as proof of a license, bond or HVHZ approval.
- Republic Home ServicesGoogle reviews
- Windows El ChuyGoogle reviews
- Ellis County Glass and GlazingGoogle reviews
- Blade Glazing LLCGoogle reviews
- Advanced Window SystemsGoogle reviews