Damascus, MD's Highest-Rated Window Installers on Google
Damascus's 9 listings below come from Google Maps rather than a state license file. IECC climate zone 4A sets the energy bar for a Damascus 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 Damascus
Damascus 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 75°F in July, so the glass package worth paying for in Damascus 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 1.9 mi away.
Google's top window installers serving Damascus, MD
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 | Refined restoration group LLC | 261 | Window installation service | Damascus 20872 | Google reviews | |
| 2 | Capitol Improvements - Gaithersburg Roofing Company & Siding Contractors | 160 | Window installation service | Gaithersburg 20879 | Google reviews | |
| 3 | MDVA Windows | 121 | Window installation service | Clarksburg 20871 | Google reviews | |
| 4 | ALIHAN LLC | 107 | Window installation service | Gaithersburg 20879 | Google reviews | |
| 5 | Premier Windows & Glass | 519 | Window installation service | Gaithersburg 20886 | Google reviews | |
| 6 | Seneca Creek Home Improvement | 97 | Window installation service | Not listed | Google reviews | |
| 7 | Next Level Exteriors | 58 | Window installation service | Germantown 20876 | Google reviews | |
| 8 | Todd Masterson Roofing & Exterior Specialists | 16 | Window installation service | Not listed | Google reviews | |
| 9 | Aspen Home Improvements | 12 | Window installation service | Germantown 20876 | 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?