10 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Anderson: Knauf Fiberglass, CR Score 60/100; 4.3★ from 137 Google reviews; open 24/7.
Most-reviewed: Tugwell Roofing Co. - Redding Roofing Company, 191 Google reviews at 4.8★, the most of 10 ranked; ranked #3.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
10 Anderson insulation contractors are ranked here by CR Score, from ten published factors. 1 is open 24/7, 3 open Saturdays and 2 open Sundays, based on posted hours. The median Google rating is 4.8★ across 10 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Knauf Fiberglass | 60 | 4.3★ (137) | Shasta Lake, 15 mi away | 24/7 | Overall |
| 2 | Apex Heating and Air Conditioning, Inc. | 60 | 4.9★ (169) | Anderson | Sat · Sun | — |
| 3 | Tugwell Roofing Co. - Redding Roofing Company | 56 | 4.8★ (191) | Anderson | — | Most reviews |
| 4 | Boster Roofing - Redding Roofing & Insulation Company | 56 | 4.8★ (63) | Anderson | — | — |
| 5 | Art of the Craft Lath & Plstr | 55 | 4.6★ (7) | Redding, 7 mi away | — | — |
| 6 | Insulation Ninjas | 54 | 5.0★ (6) | Anderson | — | — |
| 7 | JNG Insulation Pros | 54 | 4.8★ (16) | Redding, 10 mi away | — | — |
| 8 | Cal Spray Foam Insulation | 53 | 4.6★ (9) | Redding, 13 mi away | Sat | — |
| 9 | Meek's Installed Insulation - Redding | 48 | 3.8★ (27) | Redding, 13 mi away | — | — |
| 10 | Foam Experts Company | 44 | 5.0★ (5) | Shasta Lake, 15 mi away | — | — |
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 trade focus: 4.3★ from 137 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Anderson
Ranked #2 because of its Google rating and review volume: 4.9★ from 169 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Anderson
Ranked #3 because of its Google rating and review volume: 4.8★ from 191 Google reviews, the most in Anderson.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Anderson
Ranked #4 because of its Google rating and review volume: 4.8★ from 63 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Redding, 7 mi away
Ranked #5 because of its Google rating and trade focus: 4.6★ from 7 Google reviews, listed on Google as “Insulation contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Anderson
Ranked #6 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Redding, 10 mi away
Ranked #7 because of its Google rating and trade focus: 4.8★ from 16 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Redding, 13 mi away
Ranked #8 because of its Google rating and trade focus: 4.6★ from 9 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Redding, 13 mi away
Ranked #9 because of its Google rating and trade focus: 3.8★ from 27 Google reviews, listed on Google as “Truss manufacturer”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Shasta Lake, 15 mi away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Roofing contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
National price ranges in USD, not adjusted for Anderson. 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 10 Anderson 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 Anderson 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 |