Duncanville, TX's Highest-Rated Window Installers on Google
Duncanville's 5 listings below come from Google Maps rather than a state license file. IECC climate zone 2A sets the energy bar for a Duncanville window job no matter which kind of list a contractor's name comes from. Checked September 2026.
Google Maps ratings checked · How we rank
2AIECC climate zone · ENERGY STAR Southern zone
What Duncanville's climate means for your window spec
Duncanville sits in IECC climate zone 2A, the starting point for any code-minimum window performance here.
ENERGY STAR places Dallas County in its Southern zone for window certification.
Normal temperatures run 46°F in January and 84°F in July, so the glass package worth paying for in Duncanville 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 3.6 mi away.
5 top-rated window replacement companies in and near Duncanville
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 | United Window Services LLC | 52 | Window installation service | Duncanville 75116 | Google reviews | |
| 2 | Carters GC Your window replacement company | 33 | Window installation service | Cedar Hill 75104 | Google reviews | |
| 3 | KJ&M Glass Works | 14 | Window installation service | Dallas 75233 | Google reviews | |
| 4 | Lone Star Glass and Aluminum | 90 | Window installation service | Dallas 75237 | Google reviews | |
| 5 | Duncanville Glass | 10 | Window installation service | Duncanville 75137 | 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?