71 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in El Cajon: Attic Professional, CR Score 91/100; 5.0★ from 197 Google reviews; open 24/7.
Best for emergencies (open 24/7): Mauzy Cooling, Heating, Plumbing, and Electrical, posts 24/7 hours; ranked #2 of 71.
Most-reviewed: Mauzy Cooling, Heating, Plumbing, and Electrical, 4,710 Google reviews at 4.8★, the most of 71 ranked; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
71 El Cajon insulation contractors are ranked here by CR Score, from 8 published factors. 7 are open 24/7, 40 open Saturdays and 34 open Sundays, based on posted hours. The median Google rating is 5.0★ across 71 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Attic Professional | 91 | 5.0★ (197) | Santee, 3 mi away | 24/7 | Overall |
| 2 | Mauzy Cooling, Heating, Plumbing, and Electrical | 89 | 4.8★ (4,710) | El Cajon | 24/7 | Emergencies, Most reviews |
| 3 | Attic Construction | 87 | 4.9★ (316) | San Diego, 7 mi away | Sat · Sun · Evenings | — |
| 4 | Attic Projects Company | 87 | 4.9★ (888) | San Diego, 13 mi away | Sat · Sun | — |
| 5 | Miramar SD Insulation Inc. | 85 | 5.0★ (31) | San Diego, 13 mi away | 24/7 | — |
| 6 | Advanced Insulation System | 85 | 5.0★ (126) | San Diego, 12 mi away | Sat · Sun | — |
| 7 | EcoGuard Pest Management | 85 | 4.9★ (538) | Coronado, 19 mi away | Sat · Sun · Evenings | — |
| 8 | Precision Environmental | 84 | 4.5★ (31) | San Diego, 10 mi away | 24/7 | — |
| 9 | California Attic & Build | 84 | 5.0★ (144) | San Diego, 16 mi away | Sat · Sun | — |
| 10 | Attic Heroes | 83 | 5.0★ (106) | San Diego, 16 mi away | Sat · Sun · Evenings | — |
Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.
Ranked #1 because of its Google rating and availability: 5.0★ from 197 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in El Cajon
Ranked #2 because of its Google rating and review volume: 4.8★ from 4,710 Google reviews, the most Google reviews on this list (4,710).
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in San Diego, 7 mi away
Ranked #3 because of its Google rating and trade focus: 4.9★ from 316 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in San Diego, 13 mi away
Ranked #4 because of its Google rating and trade focus: 4.9★ from 888 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in San Diego, 13 mi away
Ranked #5 because of its Google rating and availability: 5.0★ from 31 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in San Diego, 12 mi away
Ranked #6 because of its Google rating and trade focus: 5.0★ from 126 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Coronado, 19 mi away
Ranked #7 because of its Google rating and trade focus: 4.9★ from 538 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in San Diego, 10 mi away
Ranked #8 because of its Google rating and availability: 4.5★ from 31 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in San Diego, 16 mi away
Ranked #9 because of its Google rating and trade focus: 5.0★ from 144 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in San Diego, 16 mi away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 106 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in San Diego, 12 mi away
Ranked #11 because of its Google rating and trade focus: 5.0★ from 40 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in San Diego, 7 mi away
Ranked #12 because of its Google rating and availability: 3.7★ from 6 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in El Cajon
Ranked #13 because of its Google rating and trade focus: 5.0★ from 32 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Carlsbad, 14 mi away
Ranked #14 because of its Google rating and trade focus: 5.0★ from 235 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in El Cajon
Ranked #15 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in El Cajon
Ranked #16 because of its Google rating and trade focus: 4.4★ from 7 Google reviews, listed on Google as “Insulation contractor”.
Based on 5 of 8 factors; credentials, recency and availability not yet collected.
Based in Carlsbad, 17 mi away
Ranked #17 because of its Google rating and trade focus: 4.9★ from 35 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in La Mesa, 5 mi away
Ranked #18 because of its Google rating and trade focus: 5.0★ from 32 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Baldwin Park, 11 mi away
Ranked #19 because of its Google rating and trade focus: 4.7★ from 31 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in San Diego, 11 mi away
Ranked #20 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in San Diego, 13 mi away
Ranked #21 because of its Google rating and trade focus: 5.0★ from 9 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in Escondido, 25 mi away
Ranked #22 because of its Google rating and trade focus: 5.0★ from 44 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in San Diego, 17 mi away
Ranked #23 because of its Google rating and availability: 5.0★ from 71 Google reviews, open 24/7.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in San Diego, 12 mi away
Ranked #24 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
Based in San Diego, 15 mi away
Ranked #25 because of its Google rating and trade focus: 5.0★ from 7 Google reviews, listed on Google as “Insulation contractor”.
Based on 6 of 8 factors; credentials and recency not yet collected.
National price ranges in USD, not adjusted for El Cajon. 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 71 El Cajon 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 El Cajon 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 |