Top-Rated Window Replacement Companies in Norristown, PA
Norristown's 10 listings below come from Google Maps rather than a state license file. IECC climate zone 4A sets the energy bar for a Norristown window job no matter which kind of list a contractor's name comes from. Checked September 2026.
Google Maps ratings checked · How we rank
4AIECC climate zone · ENERGY STAR North-Central zone
Climate and energy performance in Norristown
Norristown sits in IECC climate zone 4A, the starting point for any code-minimum window performance here.
ENERGY STAR places Montgomery County in its North-Central zone for window certification.
Normal temperatures run 32°F in January and 78°F in July, so the glass package worth paying for in Norristown isn't the same one that pencils out two zones over.
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 0.9 mi away.
Google's top window installers serving Norristown, PA
Ranked by Google rating weighted against how many people left one, so a perfect score from a handful of reviewers never outranks a strong average built on hundreds. That ranking is not a license check; call the state directly and ask for the contractor's license or registration number.
| Rank | Business | Google rating | Reviews | Category | Area | Google Maps listing |
|---|---|---|---|---|---|---|
| 1 | Pella Windows and Doors Showroom of Plymouth Meeting, PA | 1,273 | Window installation service | Plymouth Meeting 19462 | Google reviews | |
| 2 | Renewal by Andersen Window Replacement | 6,245 | Window installation service | King of Prussia 19406 | Google reviews | |
| 3 | West Shore Home | 1,579 | Window installation service | Norristown 19403 | Google reviews | |
| 4 | Graboyes Window & Door | 651 | Window installation service | East Norriton Township 19401 | Google reviews | |
| 5 | Another Glass Shop Inc. | 27 | Window installation service | Plymouth Meeting 19462 | Google reviews | |
| 6 | G. Cannon Roofing and Siding | 99 | Window installation service | Norristown 19403 | Google reviews | |
| 7 | McKeown’s Roofing & Siding, Inc. | 52 | Window installation service | Not listed | Google reviews | |
| 8 | Thompson Creek Window Company | 120 | Window installation service | Norristown 19403 | Google reviews | |
| 9 | Keystone Exterior Solutions | 22 | Window installation service | Norristown 19401 | Google reviews | |
| 10 | Palladino Window and Siding Co Inc | 16 | Window supplier | Norristown 19403 | Google reviews |
Questions to ask before you sign
- How long have you held your state license, and can I see the number?
- Is this a full-frame replacement or an insert into my existing frame, and why that one?
- Who pulls the permit, and does this change trigger an egress check on a bedroom window?
- What flashing and sill pan will you use, and in what order do you install them?
- If my home was built before 1978, is your crew lead-safe certified for this job?
- What's the completion date in writing, and what happens if the schedule slips?