Top-Rated Window Replacement Companies in Rock Island, IL
Rock Island's 6 listings below come from Google Maps rather than a state license file. IECC climate zone 5A sets the energy bar for a Rock Island window job no matter which kind of list a contractor's name comes from. Checked October 2026.
Google Maps ratings checked · How we rank
5AIECC climate zone · ENERGY STAR Northern zone
Climate and energy performance in Rock Island
Davenport-Moline-Rock Island, IA-IL piles up about 6,024 heating degree days in a normal year, against 1,041 on the cooling side of the ledger.
That's the load an ENERGY STAR-rated window in the Northern zone is built to handle.
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 3.2 mi away.
Google's top window installers serving Rock Island, IL
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 | Midwest Window Company | 295 | Window installation service | Moline 61265 | Google reviews | |
| 2 | New Look Window | 86 | Window installation service | Rock Island 61201 | Google reviews | |
| 3 | Mainstream Home Improvement | 366 | Window installation service | Moline 61265 | Google reviews | |
| 4 | Mid-American Glazing Systems, Inc. | 36 | Window installation service | Davenport 52802 | Google reviews | |
| 5 | Fanth - Curry Home Improvement Co | 80 | Window installation service | Rock Island 61201 | Google reviews | |
| 6 | Quality Glass & Mirror | 16 | Window installation service | Rock Island 61201 | 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?