Scarborough, ME Climate Specs + Top-Rated Window Installers
Scarborough sits in IECC climate zone 6A, which sets the energy-performance bar here no matter who ends up installing your windows. A window license file doesn't cover Scarborough on this site, so Google Maps supplies the 10 ranked names you see below. Checked October 2026.
Google Maps ratings checked · How we rank
6AIECC climate zone · ENERGY STAR Northern zone
What zone 6A means for a Scarborough window
Portland-South Portland, ME runs a January average near 24°F and climbs to about 70°F by July, a swing that adds up to roughly 6,795 heating degree days most winters, with 447 on the summer cooling side of the ledger.
That load is the actual argument for paying up for a better U-factor in Scarborough, separate from anything a brochure claims.
Zone 6A's requirement is the floor; Scarborough'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 5.7 mi away.
Storm and weather risk around Scarborough
FEMA rates Cumberland County's hurricane risk as Relatively Moderate and its wind risk as Relatively Moderate.
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 Scarborough home.
Ask specifically about design pressure and impact rating for Scarborough, not just energy performance, if either risk rating comes back on the high side.
- Hurricane
- Relatively Moderate
- Strong wind
- Relatively Moderate
- 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 Scarborough 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.
10 top-rated window installers near Scarborough, ME
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.
- Renewal by Andersen Window ReplacementGoogle reviews
- Horsley Exteriors LLCGoogle reviews
- Pella Windows and Doors Showroom of Scarborough, MEGoogle reviews
- Regal Replacement WindowsGoogle reviews
- A-BEST WindowGoogle reviews
- Portland Window CompanyGoogle reviews
- Quinn's Installation ContractorGoogle reviews
- Window World of Southern MaineGoogle reviews
- Maine Windows and DoorsGoogle reviews
- Loranger Door & Window Company IncGoogle reviews