Severn, MD Climate Specs + Top-Rated Window Installers
Severn sits in IECC climate zone 4A, which sets the energy-performance bar here no matter who ends up installing your windows. A window license file doesn't cover Severn on this site, so Google Maps supplies the 10 ranked names you see below. Checked September 2026.
Google Maps ratings checked · How we rank
4AIECC climate zone · ENERGY STAR North-Central zone
Severn's climate zone, in plain terms
Baltimore-Columbia-Towson, MD runs a January average near 34°F and climbs to about 78°F by July, a swing that adds up to roughly 4,484 heating degree days most winters, with 1,322 on the summer cooling side of the ledger.
That load is the actual argument for paying up for a better U-factor in Severn, separate from anything a brochure claims.
Zone 4A's requirement is the floor; Severn'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 2.2 mi away.
What FEMA's risk data says about Severn
FEMA rates Anne Arundel County's hurricane risk as Relatively Moderate 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 Severn home.
Ask specifically about design pressure and impact rating for Severn, not just energy performance, if either risk rating comes back on the high side.
- 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 Severn 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.
Severn'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.
- Safety Glass RepairGoogle reviews
- Fichtner Home ExteriorsGoogle reviews
- Mr. Handyman of Anne Arundel and PG CountyGoogle reviews
- Roofing Pups, Roofing & SidingGoogle reviews
- LKC Construction CorporationGoogle reviews
- DreamHome RemodelingGoogle reviews
- Window NationGoogle reviews
- Victory Home RemodelingGoogle reviews
- Window World of BaltimoreGoogle reviews
- Stanek WindowsGoogle reviews