Winston-Salem's Climate Data and Its Top-Rated Window Pros
Winston-Salem sits in IECC climate zone 3A, which sets the energy-performance bar here no matter who ends up installing your windows. A window license file doesn't cover Winston-Salem on this site, so Google Maps supplies the 8 ranked names you see below. Checked September 2026.
Google Maps ratings checked · How we rank
3AIECC climate zone · ENERGY STAR South-Central zone
Winston-Salem's climate zone, in plain terms
Winston-Salem falls in IECC climate zone 3A, and ENERGY STAR separately groups Forsyth 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 Winston-Salem.
A Winston-Salem, NC 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 3 mi away.
What FEMA's risk data says about Winston-Salem
FEMA scores Forsyth County's winter-weather risk as Relatively High and its flood risk as Relatively High.
Winter risk in Winston-Salem 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 Winston-Salem contractor, not one.
- Hurricane
- Relatively Moderate
- Strong wind
- Relatively High
- Winter weather
- Relatively High
Data: FEMA, National Risk Index for Natural Hazards - County-level table, v1.20 (v1.20, December 2025).
Guides to finish before Winston-Salem 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.
Winston-Salem's top-rated window installers, by Google
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.
- Vinyl Masters Home ImprovementsGoogle reviews
- Window Depot USA of The TriadGoogle reviews
- Triangle Window and DoorGoogle reviews
- Clemmons Windows & DoorsGoogle reviews
- Mid Atlantic Roofing SystemsGoogle reviews
- Salem Windows & DoorsGoogle reviews
- Window World of the TriadGoogle reviews
- Renewal by Andersen Window ReplacementGoogle reviews