North Charleston, SC Climate Specs + Top-Rated Window Installers
Local risk and climate data for North Charleston, SC sit below, translated into plain terms for a window buyer rather than left as raw codes. 10 installers follow that data instead of a license roster, their rank built from Google's star rating and how many people left one. Checked October 2026.
Google Maps ratings checked · How we rank
3AIECC climate zone · ENERGY STAR South-Central zone
What zone 3A means for a North Charleston window
North Charleston falls in IECC climate zone 3A, and ENERGY STAR separately groups Charleston 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 North Charleston.
A Charleston-North Charleston, SC 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 1.9 mi away.
Storm and weather risk around North Charleston
FEMA scores Charleston County's winter-weather risk as Relatively Moderate and its flood risk as Relatively Moderate.
Winter risk in North Charleston 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 North Charleston contractor, not one.
- Hurricane
- Very High
- Strong wind
- Relatively Moderate
- 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 North Charleston 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.
10 top-rated window installers near North Charleston, SC
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.
- Charleston Roofs and WindowsGoogle reviews
- New Beginnings Construction, IncGoogle reviews
- Top Tier Home ImprovementGoogle reviews
- Baker Home ExteriorsGoogle reviews
- Icon Window and DoorGoogle reviews
- Southern Industries Home ImprovementsGoogle reviews
- Century Commercial Glass SystemsGoogle reviews
- The Window Source of the LowcountryGoogle reviews
- The Glass GuruGoogle reviews
- Window NationGoogle reviews