42 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Lancaster: Isaac Heating and Air Conditioning, CR Score 61/100; 4.9★ from 863 Google reviews; open 24/7.
Best for emergencies (open 24/7): Graves Brothers Home Improvement, posts 24/7 hours; ranked #3 of 42.
Most-reviewed: BlueStar/GreenStar Home Services, 810 Google reviews at 4.9★, the most of 42 ranked after Isaac Heating and Air Conditioning; ranked #8.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
42 Lancaster insulation contractors are ranked here by CR Score, from ten published factors. 5 are open 24/7, 17 open Saturdays and 11 open Sundays, based on posted hours. The median Google rating is 4.7★ across 42 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Isaac Heating and Air Conditioning | 61 | 4.9★ (863) | Buffalo, 3 mi away | 24/7 | Overall |
| 2 | USA Insulation of Buffalo | 59 | 4.6★ (310) | Fort Erie, 8 mi away | Sat | — |
| 3 | Graves Brothers Home Improvement | 59 | 4.7★ (494) | Williamsville, 5 mi away | 24/7 | Emergencies |
| 4 | Primetime Energy Services | 58 | 4.9★ (92) | Depew, 3 mi away | — | — |
| 5 | NOCO Residential: HVAC, Fuels, and Energy | 57 | 4.8★ (440) | Tonawanda, 10 mi away | 24/7 | — |
| 6 | Insulation Depot USA | 56 | 4.3★ (11) | Buffalo, 4 mi away | Sat · Sun · Evenings | — |
| 7 | Great Lakes Spray Foam Insulation LLC | 56 | 4.7★ (15) | Grand Island, 10 mi away | Sat · Sun · Evenings | — |
| 8 | BlueStar/GreenStar Home Services | 56 | 4.9★ (810) | Williamsville, 4 mi away | — | Most reviews |
| 9 | Ideal Spray Foam Insulation | 55 | 5.0★ (32) | Buffalo, 9 mi away | — | — |
| 10 | Insulation Depot USA | 54 | 4.7★ (12) | Lancaster | Sat · Sun · Evenings | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Ranked #1 because of its Google rating and review volume: 4.9★ from 863 Google reviews, the most in Lancaster.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Fort Erie, 8 mi away
Ranked #2 because of its Google rating and trade focus: 4.6★ from 310 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Williamsville, 5 mi away
Ranked #3 because of its Google rating and review volume: 4.7★ from 494 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Depew, 3 mi away
Ranked #4 because of its Google rating and trade focus: 4.9★ from 92 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Tonawanda, 10 mi away
Ranked #5 because of its Google rating and review volume: 4.8★ from 440 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Buffalo, 4 mi away
Ranked #6 because of its Google rating and trade focus: 4.3★ from 11 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Grand Island, 10 mi away
Ranked #7 because of its Google rating and trade focus: 4.7★ from 15 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Williamsville, 4 mi away
Ranked #8 because of its Google rating and review volume: 4.9★ from 810 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Buffalo, 9 mi away
Ranked #9 because of its Google rating and trade focus: 5.0★ from 32 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Lancaster
Ranked #10 because of its Google rating and trade focus: 4.7★ from 12 Google reviews, listed on Google as “General contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Buffalo, 4 mi away
Ranked #11 because of its Google rating and trade focus: 4.3★ from 26 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Buffalo, 6 mi away
Ranked #12 because of its Google rating and trade focus: 4.4★ from 25 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Lackawanna, 10 mi away
Ranked #13 because of its Google rating and trade focus: 4.4★ from 14 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Tonawanda, 13 mi away
Ranked #14 because of its Google rating and trade focus: 3.8★ from 6 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in West Seneca, 5 mi away
Ranked #15 because of its Google rating and trade focus: 5.0★ from 9 Google reviews, listed on Google as “General contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Tonawanda, 13 mi away
Ranked #16 because of its Google rating and trade focus: 4.7★ from 31 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Lancaster
Ranked #17 because of its Google rating and review volume: 5.0★ from 34 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Tonawanda, 14 mi away
Ranked #18 because of its Google rating and trade focus: 3.8★ from 22 Google reviews, listed on Google as “Insulation contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Buffalo, 4 mi away
Ranked #19 because of its Google rating and review volume: 4.9★ from 58 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Fort Erie, 12 mi away
Ranked #20 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Buffalo, 5 mi away
Ranked #21 because of its Google rating and trade focus: 3.5★ from 30 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Buffalo, 12 mi away
Ranked #22 because of its Google rating and review volume: 4.7★ from 446 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Kenmore, 11 mi away
Ranked #23 because of its Google rating and trade focus: 3.7★ from 3 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Fort Erie, 14 mi away
Ranked #24 because of its Google rating and trade focus: 4.7★ from 15 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in North Tonawanda, 14 mi away
Ranked #25 because of its Google rating and trade focus: 4.1★ from 21 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
National price ranges in USD, not adjusted for Lancaster. 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 42 Lancaster insulation contractors on ten 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. A business with no Google reviews scores zero on rating, review volume and recency. Other unknown factors are left out, 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 Lancaster data |
|---|---|---|---|
| Reputation | 25% | Google star rating, adjusted for how many reviews back it | Measured |
| Credentials | 15% | Active state license, bond and workers’ comp on file | Not yet collected |
| Review volume | 10% | Number of Google reviews, compared with the most-reviewed business on the list | Measured |
| Recency | 5% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 5% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | How clearly the business does this trade (its Google category and name) | Measured |
| Proximity | 5% | Based in the city scores highest, less the farther away it is | Measured |
| Claimed profile | 10% | The business has claimed its ContractorsRanked profile (free or paid earn the same) | Measured |
| Partnered | 5% | The business links to ContractorsRanked from its own website with our badge, checked periodically | Measured |
| ContractorsRanked reviews | 10% | Verified customer reviews collected by ContractorsRanked: their rating and how many there are | Measured |