34 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Frederick: Senate Termite & Pest Control, CR Score 87/100; 4.6★ from 2,638 Google reviews; open 24/7.
Most-reviewed: Environmental Pest Control, 2,014 Google reviews at 4.9★, the most of 34 ranked after Senate Termite & Pest Control; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
34 Frederick insulation contractors are ranked here by CR Score, from 8 published factors. 1 is open 24/7, 16 open Saturdays and 4 open Sundays, based on posted hours. The median Google rating is 4.8★ across 34 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Senate Termite & Pest Control | 87 | 4.6★ (2,638) | Gaithersburg, 24 mi away | 24/7 | Overall |
| 2 | Environmental Pest Control | 84 | 4.9★ (2,014) | Germantown, 19 mi away | Sat | Most reviews |
| 3 | Atlas Home Energy Solutions | 84 | 4.9★ (858) | Frederick | — | — |
| 4 | Home Paramount Pest Control | 82 | 4.6★ (86) | Frederick | Sat | — |
| 5 | Environmental Pest Control | 81 | 4.8★ (231) | Mount Airy, 13 mi away | Sat | — |
| 6 | Tri State Home Improvements Inc. | 79 | 5.0★ (5) | Frederick | Sat · Evenings | — |
| 7 | AROCON Roofing & Construction | 78 | 4.8★ (1,809) | Westminster, 25 mi away | Sat · Sun · Evenings | — |
| 8 | Xceptional Wildlife Removal | 78 | 4.1★ (17) | Spring Ridge, 16 mi away | Sat · Sun · Evenings | — |
| 9 | Home Paramount Pest Control | 77 | 4.8★ (111) | Purcellville, 23 mi away | Sat | — |
| 10 | EET Insulation | 77 | 5.0★ (23) | Ballenger Creek, 2 mi away | — | — |
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.
Ranked #1 because of its Google rating and review volume: 4.6★ from 2,638 Google reviews, the most Google reviews on this list (2,638).
Based in Germantown, 19 mi away
Ranked #2 because of its Google rating and trade focus: 4.9★ from 2,014 Google reviews, listed on Google as “Insulation contractor”.
Based in Frederick
Ranked #3 because of its Google rating and trade focus: 4.9★ from 858 Google reviews, listed on Google as “Insulation contractor”.
Based in Frederick
Ranked #4 because of its Google rating and trade focus: 4.6★ from 86 Google reviews, listed on Google as “Insulation contractor”.
Based in Mount Airy, 13 mi away
Ranked #5 because of its Google rating and trade focus: 4.8★ from 231 Google reviews, listed on Google as “Insulation contractor”.
Based in Frederick
Ranked #6 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Insulation contractor”.
Based in Westminster, 25 mi away
Ranked #7 because of its Google rating and review volume: 4.8★ from 1,809 Google reviews, 1,809 Google reviews.
Based in Spring Ridge, 16 mi away
Ranked #8 because of its Google rating and trade focus: 4.1★ from 17 Google reviews, listed on Google as “Insulation contractor”.
Based in Purcellville, 23 mi away
Ranked #9 because of its Google rating and trade focus: 4.8★ from 111 Google reviews, listed on Google as “Insulation contractor”.
Based in Ballenger Creek, 2 mi away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 23 Google reviews, listed on Google as “Insulation contractor”.
Based in Gaithersburg, 22 mi away
Ranked #11 because of its Google rating and trade focus: 4.6★ from 90 Google reviews, listed on Google as “Insulation contractor”.
Based in Frederick
Ranked #12 because of its Google rating and review volume: 4.9★ from 476 Google reviews, 476 Google reviews.
Based in Fairfax, 23 mi away
Ranked #13 because of its Google rating and trade focus: 5.0★ from 24 Google reviews, listed on Google as “Insulation contractor”.
Based in Frederick
Ranked #14 because of its Google rating and trade focus: 4.4★ from 16 Google reviews, listed on Google as “Insulation contractor”.
Based in Gaithersburg, 21 mi away
Ranked #15 because of its Google rating and trade focus: 4.8★ from 178 Google reviews, listed on Google as “Insulation contractor”.
Based in Eldersburg, 25 mi away
Ranked #16 because of its Google rating and trade focus: 4.5★ from 65 Google reviews, listed on Google as “Insulation contractor”.
Based in Hagerstown, 23 mi away
Ranked #17 because of its Google rating and trade focus: 4.4★ from 72 Google reviews, listed on Google as “Insulation contractor”.
Based in Frederick
Ranked #18 because of its Google rating and review volume: 4.8★ from 186 Google reviews, 186 Google reviews.
Based in Rockville, 25 mi away
Ranked #19 because of its Google rating and review volume: 4.7★ from 1,445 Google reviews, 1,445 Google reviews.
Based in Frederick
Ranked #20 because of its Google rating and review volume: 5.0★ from 87 Google reviews, 87 Google reviews.
Based in Frederick
Ranked #21 because of its Google rating and trade focus: 3.7★ from 3 Google reviews, listed on Google as “Insulation contractor”.
Based in Leesburg, 22 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Insulation contractor”.
Based in Hagerstown, 22 mi away
Ranked #23 because of its Google rating and trade focus: 5.0★ from 3 Google reviews, listed on Google as “Insulation contractor”.
Based in Hagerstown, 23 mi away
Ranked #24 because of its Google rating and trade focus: 4.9★ from 48 Google reviews, listed on Google as “Insulation contractor”.
Based in Eldersburg, 25 mi away
Ranked #25 because of its Google rating and review volume: 4.9★ from 1,010 Google reviews, 1,010 Google reviews.
#1 to #25 are shown in full above. Here are #26 to #34, in CR Score order; each links to its profile.
| Rank | Business | CR Score | Google rating | Distance |
|---|---|---|---|---|
| 26 | S&K Roofing, Siding and Windows | 72 | 4.9★ (1,092) | 22 mi |
| 27 | Carroll Insulation | 71 | 4.6★ (24) | 22 mi |
| 28 | ARHT Home Solutions | 68 | 5.0★ (160) | 25 mi |
| 29 | Accurate Insulation | 68 | 3.4★ (10) | 22 mi |
| 30 | JD's Turn Keys | 65 | 5.0★ (10) | 16 mi |
| 31 | Hagerstown Drywall | 64 | 4.8★ (20) | 22 mi |
| 32 | Rocky's Roofing & Siding Inc | 63 | 3.8★ (17) | 17 mi |
| 33 | Harvey W Hottel, Inc. | 63 | 4.2★ (45) | 22 mi |
| 34 | Ellsworth Electric, Inc. | 59 | 3.5★ (45) | 23 mi |
20 more insulation contractors within 25 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 |
|---|---|---|
| AC Matthews, Roofing & Exteriors | 5.0★ (46) | In Frederick |
| AdvantaClean of Frederick | 4.8★ (76) | In Frederick |
| DRYWALL INNOVATION BY ETHAN LLC | 5.0★ (18) | In Frederick |
| Foundation Building Materials (FBM) | 4.7★ (15) | In Frederick |
| Frederick Brick Works, Inc. | 4.6★ (117) | In Frederick |
| Kelco Insulation Inc | 5.0★ (2) | In Frederick |
| Nationwide Energy Solutions | 5.0★ (6) | In Frederick |
| Nationwide General Contracting | 4.1★ (71) | In Frederick |
| Optimum Spray Foam Insulation | 5.0★ (2) | In Frederick |
| Politz Enterprises Inc. | 4.9★ (165) | In Frederick |
| Premier Choice Exteriors | 4.8★ (34) | In Frederick |
| Robert A Aird Inc | 4.1★ (9) | In Frederick |
| Robey Incorporated | 4.4★ (7) | In Frederick |
| Semper West Roofing | 5.0★ (303) | In Frederick |
| Smock Heating & Air | 5.0★ (1,623) | In Frederick |
| Summit Construction, Inc. | 3.0★ (6) | In Frederick |
| TEO Roofing | 4.9★ (283) | In Frederick |
| Topper Construction | 4.7★ (151) | In Frederick |
| Triad Basement Waterproofing | 5.0★ (37) | In Frederick |
| Window World of Frederick County | 4.3★ (66) | In Frederick |
National price ranges in USD, not adjusted for Frederick. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Attic insulation | $1,700 | $2,100 | $2,500 | Per attic: typical range of customer-reported jobs (about $1 to $3 per sq ft). US national range | October 2026 |
We scored 34 Frederick insulation contractors 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 Frederick 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 |