What Bakersfield Homes Need From a Replacement Window

Bakersfield sits in IECC climate zone 3B, which sets the energy-performance bar for any window installed here. Below that, a short list of Bakersfield's longest-licensed window contractors can turn a spec into an actual installed window.

Licenses checked September 30, 2026 · California Contractors State License Board

3BIECC climate zone · ENERGY STAR South-Central zone

Bakersfield's climate zone, in plain terms

Bakersfield-Delano, CA runs a January average near 49°F and climbs to about 84°F by July, a swing that adds up to roughly 2,153 heating degree days most winters, with 2,219 on the summer cooling side of the ledger.

That load is the actual argument for paying up for a better U-factor in Bakersfield, separate from anything a brochure claims.

Zone 3B's requirement is the floor; Bakersfield'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 4.6 mi away.

What FEMA's risk data says about Bakersfield

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

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

Strong wind: Relatively Low
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 Bakersfield 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.

Bakersfield's longest-licensed window installers

Oldest license first, newest last, pulled directly from the state's file. This list isn't for sale.

Kern Glass And Aluminum CompanyWindow and glass contractor · licensed 65 years · 93308Verify license
Backyard And Home ConstructionWindow and glass contractor · licensed 45 years · 93309Verify license
Action Glass INCWindow and glass contractor · licensed 31 years · 93301Verify license
Oildale GlassWindow and glass contractor · licensed 29 years · 93308Verify license
GH Slack & SonWindow and glass contractor · licensed 28 years · 93303Verify license
Manny's Stockdale GlassWindow and glass contractor · licensed 27 years · 93313Verify license
Century GlassWindow and glass contractor · licensed 27 years · 93307Verify license
Atlas GlassWindow and glass contractor · licensed 23 years · 93306Verify license
Vortex ConstructionWindow and glass contractor · licensed 19 years · 93308Verify license
South Valley GlassWindow and glass contractor · licensed 18 years · 93307Verify license
Golden State Window And Glass IndustriesWindow and glass contractor · licensed 17 years · 93312Verify license
McKinley Window & Door INCWindow and glass contractor · licensed 12 years · 93308Verify license

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