Reston, VA Climate Specs + Top-Rated Window Installers
ENERGY STAR groups Fairfax County into its North-Central zone, the U-factor and SHGC target worth checking against any quote you get in Reston. Below that spec discussion sit 10 installers, their order set by Google rating, since Reston is outside this site's window license file. A high rating is worth a look, not a finished decision.
Google Maps ratings checked · How we rank
4AIECC climate zone · ENERGY STAR North-Central zone
Reston's climate zone, in plain terms
Fairfax County's normal precipitation runs about 43.6 inches a year, with 18.5 inches of snow, which is a separate question from energy performance but still shapes which window details matter in Reston.
Moisture and glass performance are handled by different parts of a window's spec sheet, and a Reston 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 5.2 mi away.
What FEMA's risk data says about Reston
Fairfax County's hail risk sits at Relatively High and its wildfire risk at Very Low, according to FEMA's National Risk Index.
Hail risk matters for glass and screen durability in Reston; wildfire risk matters more for the frame material and nearby vegetation than for the glass itself.
Either way, it's a reasonable question to bring to a Reston installer before you settle on a product line.
- Hurricane
- Relatively Moderate
- Strong wind
- Relatively High
- Winter weather
- Very High
Data: FEMA, National Risk Index for Natural Hazards - County-level table, v1.20 (v1.20, December 2025).
Guides to finish before Reston 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.
Reston'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.
- Metro Renovator Group Inc.Google reviews
- LAB ExteriorsGoogle reviews
- Homefix Roofing and Window Installation of RestonGoogle reviews
- ElevationBuildGoogle reviews
- Platinum Home Design LLCGoogle reviews
- Nexa Exteriors Roofing & SidingGoogle reviews
- Nova InstallationsGoogle reviews
- Glass and Window SolutionsGoogle reviews
- Discount Window RepairGoogle reviews
- JUNA Glass and Windows LlcGoogle reviews