89/100CR Score
Ranked #1 because of its Google rating and availability: 5.0★ from 392 Google reviews, open 24/7.
- 5.0★ from 392 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 19006 Perrone Dr, Germantown, MD 20874
Best Window Installers in Thurmont, MD (2026)
148 window installers ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Thurmont: Quality Window & Glass Repair LLC, CR Score 89/100; 5.0★ from 392 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Safety Glass Repair, posts 24/7 hours; ranked #2 of 148.
- 14
Most-reviewed: AROCON Roofing & Construction, 1,809 Google reviews at 4.8★, the most of 148 ranked; ranked #14.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
148 Thurmont window installers are ranked here by CR Score, from 8 published factors. 28 are open 24/7, 92 open Saturdays and 50 open Sundays, based on posted hours. The median Google rating is 4.9★ across 148 rated businesses.
Top 10 window installers in Thurmont at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Quality Window & Glass Repair LLC | 89 | 5.0★ (392) | Germantown, 32 mi away | 24/7 | Overall |
| 2 | Safety Glass Repair | 87 | 5.0★ (165) | Gaithersburg, 33 mi away | 24/7 | Emergencies |
| 3 | Semper West Roofing | 85 | 5.0★ (303) | Frederick, 16 mi away | 24/7 | — |
| 4 | Auto Glass Experts | 84 | 5.0★ (50) | Aspen Hill, 35 mi away | 24/7 | — |
| 5 | Mighty Dog Roofing of Waynesboro | 84 | 5.0★ (170) | Waynesboro, 11 mi away | 24/7 | — |
| 6 | Wize Window & Door | 84 | 5.0★ (19) | Chambersburg, 25 mi away | 24/7 | — |
| 7 | Happy Home | 84 | 5.0★ (191) | Hagerstown, 15 mi away | 24/7 | — |
| 8 | TEO Roofing | 84 | 4.9★ (283) | Frederick, 17 mi away | 24/7 | — |
| 9 | Mid-Atlantic Home Improvement Co. | 83 | 4.8★ (45) | Gaithersburg, 34 mi away | 24/7 | — |
| 10 | PRG LLC | 83 | 5.0★ (263) | Damascus, 24 mi away | 24/7 | — |
The 148 best window installers in Thurmont, ranked
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Scores below: based on 6 of 8 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Based in Gaithersburg, 33 mi away
87/100CR ScoreRanked #2 because of its Google rating and availability: 5.0★ from 165 Google reviews, open 24/7.
- 5.0★ from 165 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 20032 Mattingly Terrace, Gaithersburg, MD 20879
Based in Frederick, 16 mi away
85/100CR ScoreRanked #3 because of its Google rating and availability: 5.0★ from 303 Google reviews, open 24/7.
- 5.0★ from 303 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 9211 Baltimore Rd, Frederick, MD 21704
Based in Aspen Hill, 35 mi away
84/100CR ScoreRanked #4 because of its Google rating and availability: 5.0★ from 50 Google reviews, open 24/7.
- 5.0★ from 50 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Waynesboro, 11 mi away
84/100CR ScoreRanked #5 because of its Google rating and availability: 5.0★ from 170 Google reviews, open 24/7.
- 5.0★ from 170 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1981 Market Square Blvd, Waynesboro, PA 17268
Based in Chambersburg, 25 mi away
84/100CR ScoreRanked #6 because of its Google rating and availability: 5.0★ from 19 Google reviews, open 24/7.
- 5.0★ from 19 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 375 Floral Ave #115, Chambersburg, PA 17202
#7 Happy Home
Based in Hagerstown, 15 mi away
84/100CR ScoreRanked #7 because of its Google rating and availability: 5.0★ from 191 Google reviews, open 24/7.
- 5.0★ from 191 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 19638 Leitersburg Pike Suite 200, Hagerstown, MD 21742
#8 TEO Roofing
Based in Frederick, 17 mi away
84/100CR ScoreRanked #8 because of its Google rating and availability: 4.9★ from 283 Google reviews, open 24/7.
- 4.9★ from 283 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 5229 New Design Rd, Frederick, MD 21703
Based in Gaithersburg, 34 mi away
83/100CR ScoreRanked #9 because of its Google rating and availability: 4.8★ from 45 Google reviews, open 24/7.
- 4.8★ from 45 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 17729 Stoneridge Dr, Gaithersburg, MD 20878
#10 PRG LLC
Based in Damascus, 24 mi away
83/100CR ScoreRanked #10 because of its Google rating and availability: 5.0★ from 263 Google reviews, open 24/7.
- 5.0★ from 263 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 27421 Clarksburg Rd, Damascus, MD 20872
Based in Hanover, 26 mi away
83/100CR ScoreRanked #11 because of its Google rating and availability: 4.8★ from 660 Google reviews, open 24/7.
- 4.8★ from 660 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1446 Baltimore St Suite E, Hanover, PA 17331
Based in Darnestown, 40 mi away
83/100CR ScoreRanked #12 because of its Google rating and trade focus: 4.9★ from 231 Google reviews, listed on Google as “Window installation service”.
- 4.9★ from 231 Google reviews
- Hours
- Mon–Fri 8 AM–8 PM · Sat 9:30 AM–4:30 PM · Sun 10 AM–3 PM
#13 Roof Right Inc.
Based in Hampstead, 30 mi away
82/100CR ScoreRanked #13 because of its Google rating and availability: 4.8★ from 607 Google reviews, open 24/7.
- 4.8★ from 607 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1621 Hanover Pike, Hampstead, MD 21074
Based in Westminster, 22 mi away
82/100CR ScoreRanked #14 because of its Google rating and review volume: 4.8★ from 1,809 Google reviews, the most Google reviews on this list (1,809).
- 4.8★ from 1,809 Google reviews
- Hours
- Mon–Fri 7:30 AM–8 PM · Sat–Sun 9 AM–8 PM
- Address
- 101 R John St, Westminster, MD 21157
#15 Shanco Roofing
Based in Gaithersburg, 35 mi away
81/100CR ScoreRanked #15 because of its Google rating and availability: 4.9★ from 401 Google reviews, open 24/7.
- 4.9★ from 401 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 7404 Lindbergh Dr suite g, Gaithersburg, MD 20879
Based in Baltimore, 28 mi away
81/100CR ScoreRanked #16 because of its Google rating and availability: 4.8★ from 337 Google reviews, open 24/7.
- 4.8★ from 337 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
#17 Varner Roofing
Based in Waynesboro, 11 mi away
81/100CR ScoreRanked #17 because of its Google rating and availability: 4.9★ from 48 Google reviews, open 24/7.
- 4.9★ from 48 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 2025 Market Square Blvd, Waynesboro, PA 17268
Based in Frederick, 15 mi away
81/100CR ScoreRanked #18 because of its Google rating and availability: 5.0★ from 46 Google reviews, open 24/7.
- 5.0★ from 46 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 11 W Patrick St, Frederick, MD 21701
Based in Ballenger Creek, 16 mi away
81/100CR ScoreRanked #19 because of its Google rating and availability: 4.8★ from 93 Google reviews, open 24/7.
- 4.8★ from 93 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
Based in Germantown, 32 mi away
80/100CR ScoreRanked #20 because of its Google rating and trade focus: 5.0★ from 212 Google reviews, listed on Google as “Window installation service”.
- 5.0★ from 212 Google reviews
- Hours
- Mon–Fri 9 AM–5 PM · Sat 11:30 AM–4 PM · Sun closed
- Address
- 13604 Duhart Rd, Germantown, MD 20874
Based in Waynesboro, 13 mi away
80/100CR ScoreRanked #21 because of its Google rating and trade focus: 5.0★ from 210 Google reviews, listed on Google as “Window installation service”.
- 5.0★ from 210 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat–Sun closed
- Address
- 700 S Potomac St, Waynesboro, PA 17268
Based in Rockville, 40 mi away
80/100CR ScoreRanked #22 because of its Google rating and trade focus: 4.9★ from 424 Google reviews, listed on Google as “Window installation service”.
- 4.9★ from 424 Google reviews
- Hours
- Mon–Fri 8 AM–6 PM · Sat 8 AM–1 PM · Sun closed
- Address
- 324 Seth Pl, Rockville, MD 20850
Based in Frederick, 15 mi away
80/100CR ScoreRanked #23 because of its Google rating and trade focus: 5.0★ from 29 Google reviews, listed on Google as “Window installation service”.
- 5.0★ from 29 Google reviews
- Hours
- Mon–Fri 8:30 AM–7:30 PM · Sat 9 AM–5 PM · Sun closed
- Address
- 23 W All Saints St, Frederick, MD 21701
#24 MDVA Windows
Based in Clarksburg, 27 mi away
80/100CR ScoreRanked #24 because of its Google rating and trade focus: 4.9★ from 96 Google reviews, listed on Google as “Window installation service”.
- 4.9★ from 96 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 12828 Clarksburg Square Rd UNIT 304, Clarksburg, MD 20871
Based in Hagerstown, 17 mi away
79/100CR ScoreRanked #25 because of its Google rating and availability: 4.7★ from 39 Google reviews, open 24/7.
- 4.7★ from 39 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 33 W Franklin St #307, Hagerstown, MD 21740
Window installers ranked #26 to #50
#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile. We publish the top 50 of 148 ranked window installers here; the rest are on their profiles.
Also serving Thurmont
20 more window installers within 40 mi that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| Albaugh & Sons | 4.8★ (244) | In Thurmont |
| All Four Seasons Co. Inc. | 3.0★ (1) | 27 mi |
| Baker Tree Services | 4.9★ (276) | In Thurmont |
| BulletpROOF Exteriors LLC | 5.0★ (175) | In Thurmont |
| Fish Window Cleaning | 5.0★ (2) | 35 mi |
| Houck Construction | 3.1★ (8) | In Thurmont |
| James R Irvine Construction | 5.0★ (6) | In Thurmont |
| Keystone Modular Homes | 4.3★ (6) | In Thurmont |
| Let George Do It | 5.0★ (1) | 24 mi |
| LMNO Projects | 5.0★ (1) | In Thurmont |
| Lopez Remodeling, LLC | 5.0★ (2) | 30 mi |
| Maryland Installation Services | 5.0★ (2) | 26 mi |
| Piedmont Building Services | 4.9★ (91) | In Thurmont |
| Pro Star Builders LLLP | In Thurmont | |
| Reasonable Solutions LLC | 5.0★ (2) | 36 mi |
| Red Turtle Roofing of Germantown | 5.0★ (1) | 30 mi |
| Robert Jackson Siding and Windows | 5.0★ (2) | 38 mi |
| Skyline Construction, Inc | In Thurmont | |
| Squeaky Clean, Inc. | 4.8★ (40) | In Thurmont |
| The Window Company | 5.0★ (1) | 28 mi |
How much do window installers cost in Thurmont?
Typical prices in USD, adjusted for Maryland with a published regional index. Each row names its basis and month.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Window replacement | $3,370 | $7,200 | $11,600 | Per project (several windows): typical range of customer-reported projects. US national range × 0.98 South Atlantic factor (2025 Cost vs. Value Report) | October 2026 |
How we ranked Thurmont window installers
We scored 148 Thurmont window installers on 8 factors, weighted as shown. A business is ranked when its trade is confirmed and it has 3 or more Google reviews or a claimed profile. Unknown factors are left out of the score, not counted as zero. Scores last refreshed October 22, 2026.
Paid placement never changes a rank or score. Featured businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.
| Factor | Weight | Computed from | In Thurmont data |
|---|---|---|---|
| Reputation | 35% | Bayesian-adjusted Google star rating | Measured |
| Credentials | 15% | Active state license 0.6, bond 0.2, workers’ comp 0.2 | Not yet collected |
| Review volume | 10% | log10(reviews + 1) against the list maximum | Measured |
| Recency | 10% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 10% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | Google main category 1.0, business name 0.7, additional category 0.5 | Measured |
| Proximity | 5% | 1.0 when based in the city, falling to 0 at the trade’s radius | Measured |
| Completeness | 5% | Website, photos, description, hours, claimed profile (0.2 each) | Measured |
Window installers in Thurmont: frequently asked questions
Who is the best window installer in Thurmont?
By CR Score, the highest-ranked window installer in Thurmont, MD is Quality Window & Glass Repair LLC with a CR Score of 89/100. It has 5.0★ from 392 Google reviews. It is open 24/7. Safety Glass Repair (#2) and Semper West Roofing (#3) follow. We ranked 148 window installers on 8 factors, last updated October 22, 2026.
How many window installers are there in Thurmont?
ContractorsRanked ranks 148 window installers serving Thurmont, MD. Another 20 within 40 mi are listed but not ranked yet. Counts are as of October 2026.
Which window installers in Thurmont are open 24/7?
28 ranked window installers in Thurmont post 24/7 hours. The highest-ranked are Quality Window & Glass Repair LLC (#1), Safety Glass Repair (#2) and Semper West Roofing (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which window installers in Thurmont work on weekends?
92 of 148 ranked window installers post Saturday hours and 50 post Sunday hours. The highest-ranked open Saturdays are Quality Window & Glass Repair LLC (#1), Safety Glass Repair (#2) and Semper West Roofing (#3). Posted hours are office hours; crews may book weekend jobs separately.
How much does window replacement cost in Thurmont?
Window replacement typically costs $3,370 to $11,600, with $7,200 typical (Per project (several windows): typical range of customer-reported projects. US national range × 0.98 South Atlantic factor (2025 Cost vs. Value Report)). The range is adjusted for Maryland. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do Thurmont window installers have?
The median Google rating among 148 rated window installers in Thurmont is 4.9★, with a median of 44 reviews. AROCON Roofing & Construction has the most, 1,809 reviews, and ranks #14. We adjust ratings for review count, so a few five-star reviews cannot top the list.
How does ContractorsRanked rank window installers?
Each window installer gets a 0–100 CR Score from 8 published factors, led by reputation (35%), credentials (15%), review volume (10%) and recency (10%). Factors we cannot measure are left out, not scored as zero. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.
Do window installers outside Thurmont count in this ranking?
Yes, if they are within 40 mi of the Thurmont city center, our service radius for window installers. Each listing shows where the business is based and how far away it is. Proximity is 5% of the CR Score, so a nearby business gets a small edge.
Update log for Thurmont
- October 2026: CR Scores recalculated for 148 window installers serving Thurmont.
- October 2026: 1 duplicate listing merged.
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