84 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Manassas: The Fifth Fuel, CR Score 59/100; 4.9★ from 305 Google reviews.
Best for emergencies (open 24/7): Senate Termite & Pest Control, posts 24/7 hours; ranked #3 of 84.
Most-reviewed: EcoShield Pest Solutions, 4,576 Google reviews at 4.7★, the most of 84 ranked; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
84 Manassas insulation contractors are ranked here by CR Score, from ten published factors. 12 are open 24/7, 47 open Saturdays and 19 open Sundays, based on posted hours. The median Google rating is 4.9★ across 84 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | The Fifth Fuel | 59 | 4.9★ (305) | Manassas | — | Overall |
| 2 | EcoShield Pest Solutions | 59 | 4.7★ (4,576) | Sterling, 17 mi away | Sat | Most reviews |
| 3 | Senate Termite & Pest Control | 59 | 4.6★ (2,022) | Manassas | 24/7 | Emergencies |
| 4 | Environmental Pest Control | 59 | 4.9★ (874) | Dale City, 15 mi away | Sat | — |
| 5 | NV Waterproofing & Foundation Repair | 58 | 4.9★ (975) | Manassas | Sat · Sun | — |
| 6 | Founders Insulation | 58 | 4.8★ (99) | Chantilly, 9 mi away | Sat · Sun | — |
| 7 | Environmental Pest Control | 57 | 4.8★ (483) | Reston, 15 mi away | Sat | — |
| 8 | Leonard Splaine Co. | 56 | 4.9★ (1,060) | Dale City, 13 mi away | 24/7 | — |
| 9 | PestNow | 56 | 4.6★ (2,654) | Sterling, 17 mi away | — | — |
| 10 | Comfenergy | 56 | 4.8★ (378) | Sterling, 18 mi away | Sat | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Scores below: based on 8 of 10 factors; credentials and recency not yet collected. Hatched segments mark factors we don't have yet.
Ranked #1 because of its Google rating and trade focus: 4.9★ from 305 Google reviews, listed on Google as “Insulation contractor”.
Based in Sterling, 17 mi away
Ranked #2 because of its Google rating and review volume: 4.7★ from 4,576 Google reviews, the most in Manassas.
Based in Manassas
Ranked #3 because of its Google rating and review volume: 4.6★ from 2,022 Google reviews.
Based in Dale City, 15 mi away
Ranked #4 because of its Google rating and trade focus: 4.9★ from 874 Google reviews, listed on Google as “Insulation contractor”.
Based in Manassas
Ranked #5 because of its Google rating and review volume: 4.9★ from 975 Google reviews.
Based in Chantilly, 9 mi away
Ranked #6 because of its Google rating and trade focus: 4.8★ from 99 Google reviews, listed on Google as “Insulation contractor”.
Based in Reston, 15 mi away
Ranked #7 because of its Google rating and trade focus: 4.8★ from 483 Google reviews, listed on Google as “Insulation contractor”.
Based in Dale City, 13 mi away
Ranked #8 because of its Google rating and review volume: 4.9★ from 1,060 Google reviews.
Based in Sterling, 17 mi away
Ranked #9 because of its Google rating and trade focus: 4.6★ from 2,654 Google reviews, listed on Google as “Insulation contractor”.
Based in Sterling, 18 mi away
Ranked #10 because of its Google rating and trade focus: 4.8★ from 378 Google reviews, listed on Google as “Insulation contractor”.
Based in Manassas
Ranked #11 because of its Google rating and trade focus: 4.2★ from 58 Google reviews, listed on Google as “Insulation contractor”.
Based in Sterling, 18 mi away
Ranked #12 because of its Google rating and review volume: 4.9★ from 1,501 Google reviews.
Based in Manassas
Ranked #13 because of its Google rating and availability: 5.0★ from 62 Google reviews, open 24/7.
Based in Dale City, 13 mi away
Ranked #14 because of its Google rating and trade focus: 4.7★ from 163 Google reviews, listed on Google as “Insulation contractor”.
Based in Arlington, 21 mi away
Ranked #15 because of its Google rating and trade focus: 4.9★ from 33 Google reviews, listed on Google as “Insulation contractor”.
Based in Mount Vernon, 12 mi away
Ranked #16 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “Insulation contractor”.
Based in Falls Church, 16 mi away
Ranked #17 because of its Google rating and review volume: 4.9★ from 1,580 Google reviews.
Based in Chillum, 19 mi away
Ranked #18 because of its Google rating and trade focus: 4.5★ from 98 Google reviews, listed on Google as “Insulation contractor”.
Based in Gainesville, 2 mi away
Ranked #19 because of its Google rating and availability: 5.0★ from 35 Google reviews, open 24/7.
Based in Falls Church, 18 mi away
Ranked #20 because of its Google rating and trade focus: 4.6★ from 147 Google reviews, listed on Google as “Insulation contractor”.
Based in Dale City, 12 mi away
Ranked #21 because of its Google rating and trade focus: 4.6★ from 33 Google reviews, listed on Google as “Insulation contractor”.
Based in Arbutus, 13 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 23 Google reviews, listed on Google as “Insulation contractor”.
Based in Manassas
Ranked #23 because of its Google rating and availability: 5.0★ from 11 Google reviews, open 24/7.
Based in Bethesda, 13 mi away
Ranked #24 because of its Google rating and trade focus: 5.0★ from 14 Google reviews, listed on Google as “Roofing contractor”.
Based in Reston, 15 mi away
Ranked #25 because of its Google rating and review volume: 4.9★ from 87 Google reviews.
National price ranges in USD, not adjusted for Manassas. 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 84 Manassas 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 Manassas 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 |