Google's Top-Rated Window Pros Near Lower Gwynedd, PA
Lower Gwynedd's 10 listings below come from Google Maps rather than a state license file. IECC climate zone 4A sets the energy bar for a Lower Gwynedd 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
What Lower Gwynedd's climate means for your window spec
Lower Gwynedd 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 76°F in July, so the glass package worth paying for in Lower Gwynedd 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 4.7 mi away.
10 top-rated window replacement companies in and near Lower Gwynedd
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 | Washington Windows | 94 | Window installation service | Lansdale 19446 | Google reviews | |
| 2 | Spring House Window & Door | 81 | Window installation service | Spring House 19477 | Google reviews | |
| 3 | Graboyes Window & Door | 651 | Window installation service | East Norriton Township 19401 | Google reviews | |
| 4 | Window World of Philadelphia | 395 | Window installation service | Horsham 19044 | Google reviews | |
| 5 | G. Fedale Roofing and Siding | 254 | Window installation service | North Wales 19454 | Google reviews | |
| 6 | NexGen Exterior Home Remodeling, LLC | 226 | Window installation service | Ambler 19002 | Google reviews | |
| 7 | Catalfano Brothers | 203 | Window installation service | North Wales 19454 | Google reviews | |
| 8 | Reliance Roofing & Siding | 83 | Window installation service | Ambler 19002 | Google reviews | |
| 9 | ACRE Windows | 574 | Window installation service | Horsham 19044 | Google reviews | |
| 10 | Bucks County Windows | 50 | Window installation service | Not listed | 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?