Mountain Brook, AL Climate Specs + Top-Rated Window Installers

Mountain Brook 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 Mountain Brook on this site, so Google Maps supplies the 8 ranked names you see below. Checked October 2026.

Google Maps ratings checked October 1, 2026 · How we rank

3AIECC climate zone · ENERGY STAR South-Central zone

Mountain Brook's climate zone, in plain terms

Mountain Brook falls in IECC climate zone 3A, and ENERGY STAR separately groups Jefferson 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 Mountain Brook.

A Birmingham, AL 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 Mountain Brook

Jefferson County's hail risk sits at Very Low and its wildfire risk at Relatively Low, according to FEMA's National Risk Index.

Hail risk matters for glass and screen durability in Mountain Brook; 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 Mountain Brook installer before you settle on a product line.

Hurricane: Relatively Low
Strong wind: Relatively High
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 Mountain Brook 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.

Mountain Brook'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.

AGT Home SolutionsWindow installation service · 5.0 out of 5 on Google · 71 Google reviews · Birmingham 35242Google reviews
Window Installation BirminghamWindow installation service · 4.8 out of 5 on Google · 24 Google reviews · Birmingham 35205Google reviews
Birmingham Window ReplacementWindow installation service · 5.0 out of 5 on Google · 11 Google reviews · Vestavia Hills 35242Google reviews
Pell City Window ReplacementWindow installation service · 4.8 out of 5 on Google · 19 Google reviews · Not listedGoogle reviews
Window World of Central AlabamaWindow installation service · 4.5 out of 5 on Google · 1,245 Google reviews · Birmingham 35209Google reviews
Glass Doctor of BirminghamWindow installation service · 4.5 out of 5 on Google · 325 Google reviews · Homewood 35209Google reviews
Marvin Windows By Dale IncWindow supplier · 4.3 out of 5 on Google · 3 Google reviews · Birmingham 35222Google reviews
Pella Windows and Doors Showroom of Birmingham, ALWindow installation service · 4.2 out of 5 on Google · 162 Google reviews · Birmingham 35209Google reviews

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