Crestwood, MO Climate Specs + Top-Rated Window Installers
ENERGY STAR groups St. Louis County into its North-Central zone, the U-factor and SHGC target worth checking against any quote you get in Crestwood. Below that spec discussion sit 6 installers, their order set by Google rating, since Crestwood 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
Crestwood's climate zone, in plain terms
Crestwood falls in IECC climate zone 4A, and ENERGY STAR separately groups St. Louis County into its North-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 Crestwood.
A St. Louis, MO-IL 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 6.2 mi away.
What FEMA's risk data says about Crestwood
FEMA rates St. Louis County's hurricane risk as Very Low and its wind risk as Relatively High.
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 Crestwood home.
Ask specifically about design pressure and impact rating for Crestwood, not just energy performance, if either risk rating comes back on the high side.
- Hurricane
- Very Low
- 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 Crestwood 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.
Crestwood'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.
- Gravois GlassGoogle reviews
- Wholesale Siding DepotGoogle reviews
- Alenco Inc.Google reviews
- Webster Window and DoorGoogle reviews
- Champion Replacement Windows of St. LouisGoogle reviews
- Viviano Windows & DoorGoogle reviews