Top-Rated Window Installers Near Gresham, OR
Gresham sits in IECC climate zone 4C, which sets the energy-performance bar here no matter who ends up installing your windows. A window license file doesn't cover Gresham on this site, so Google Maps supplies the 10 ranked names you see below. Checked October 2026.
Google Maps ratings checked · How we rank
4CIECC climate zone · ENERGY STAR Northern zone
Gresham's climate zone, in plain terms
Gresham falls in IECC climate zone 4C, and ENERGY STAR separately groups Multnomah County into its Northern 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 Gresham.
A Portland-Vancouver-Hillsboro, OR-WA 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 3.7 mi away.
What FEMA's risk data says about Gresham
FEMA scores Multnomah County's winter-weather risk as Relatively High and its flood risk as Relatively High.
Winter risk in Gresham weighs on U-factor and condensation resistance; flood risk weighs more on sill height and drainage detailing than on the glass package.
Treat these as two separate conversations with a Gresham contractor, not one.
- Strong wind
- Relatively Moderate
- 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 Gresham 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.
Gresham'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.
- Town & Country GlassGoogle reviews
- Exterior Barrier, LLCGoogle reviews
- Bridgetown Window & Door, Inc.Google reviews
- Gorilla WorksGoogle reviews
- Portland General Exteriors, LLCGoogle reviews
- Trinity Glass and Shower Doors LLCGoogle reviews
- Window NationGoogle reviews
- Mt. Hood GlassGoogle reviews
- Hillsview Building - Replacement Windows & DoorsGoogle reviews
- Infinity Replacement by MarvinGoogle reviews