89/100CR Score
Ranked #1 because of its Google rating and availability: 4.9★ from 859 Google reviews, open 24/7.
- 4.9★ from 859 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1571 S Sunkist St Suite H, Anaheim, CA 92806
Best Insulation Contractors in Glendora, CA (2026)
160 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Glendora: CURA Termite and Pest Control, CR Score 89/100; 4.9★ from 859 Google reviews; open 24/7.
- 2
Best for emergencies (open 24/7): Priority Attic Insulation, posts 24/7 hours; ranked #2 of 160.
- 10
Most-reviewed: NexGen HVAC & Plumbing, 2,250 Google reviews at 4.7★, the most of 160 ranked; ranked #10.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
160 Glendora insulation contractors are ranked here by CR Score, from 8 published factors. 22 are open 24/7, 117 open Saturdays and 102 open Sundays, based on posted hours. The median Google rating is 5.0★ across 160 rated businesses.
Top 10 insulation contractors in Glendora at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | CURA Termite and Pest Control | 89 | 4.9★ (859) | Anaheim, 23 mi away | 24/7 | Overall |
| 2 | Priority Attic Insulation | 87 | 4.6★ (47) | Glendora | 24/7 | Emergencies |
| 3 | Brad's Insulation | 87 | 4.9★ (94) | Azusa, 2 mi away | Sat · Sun · Evenings | — |
| 4 | Attic Projects | 85 | 5.0★ (168) | Rancho Cucamonga, 17 mi away | Sat · Sun · Evenings | — |
| 5 | Attic Projects | 84 | 4.9★ (584) | Orange, 24 mi away | Sat · Sun · Evenings | — |
| 6 | All | 84 | 4.9★ (27) | San Dimas, 3 mi away | Sat · Sun · Evenings | — |
| 7 | First Defense Insulation | 84 | 4.8★ (31) | Covina, 2 mi away | Sat · Sun · Evenings | — |
| 8 | Insulation Labs | 84 | 5.0★ (135) | Fullerton, 17 mi away | Sat · Sun · Evenings | — |
| 9 | NexGen HVAC & Plumbing | 83 | 4.7★ (538) | Arcadia, 8 mi away | 24/7 | — |
| 10 | NexGen HVAC & Plumbing | 83 | 4.7★ (2,250) | Anaheim, 20 mi away | 24/7 | Most reviews |
The 160 best insulation contractors in Glendora, ranked
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.
Based in Glendora
87/100CR ScoreRanked #2 because of its Google rating and availability: 4.6★ from 47 Google reviews, open 24/7.
- 4.6★ from 47 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 1030 E Rte 66, Glendora, CA 91740
Based in Azusa, 2 mi away
87/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.9★ from 94 Google reviews, listed on Google as “Insulation contractor”.
- 4.9★ from 94 Google reviews
- Hours
- Mon–Sun 6 AM–7 PM
- Address
- 1349 N Alameda Ave, Azusa, CA 91702
Based in Rancho Cucamonga, 17 mi away
85/100CR ScoreRanked #4 because of its Google rating and trade focus: 5.0★ from 168 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 168 Google reviews
- Hours
- Mon–Fri 7 AM–8 PM · Sat 8 AM–6 PM · Sun 7 AM–8 PM
- Address
- 8690 Red Oak St, Rancho Cucamonga, CA 91730
Based in Orange, 24 mi away
84/100CR ScoreRanked #5 because of its Google rating and trade focus: 4.9★ from 584 Google reviews, listed on Google as “Insulation contractor”.
- 4.9★ from 584 Google reviews
- Hours
- Mon–Fri 7 AM–8 PM · Sat 8 AM–6 PM · Sun 7 AM–8 PM
- Address
- 1607 W Orange Grove Ave Suite A, Orange, CA 92868
#6 All
Based in San Dimas, 3 mi away
84/100CR ScoreRanked #6 because of its Google rating and trade focus: 4.9★ from 27 Google reviews, listed on Google as “Insulation contractor”.
- 4.9★ from 27 Google reviews
- Hours
- Mon–Sun 8 AM–10 PM
- Address
- 1453 W Arrow Hwy, San Dimas, CA 91773
Based in Covina, 2 mi away
84/100CR ScoreRanked #7 because of its Google rating and trade focus: 4.8★ from 31 Google reviews, listed on Google as “Insulation contractor”.
- 4.8★ from 31 Google reviews
- Hours
- Mon–Fri 8 AM–9 PM · Sat 7 AM–8 PM · Sun 8 AM–10 PM
- Address
- 1343 N Grand Ave A, Covina, CA 91724
Based in Fullerton, 17 mi away
84/100CR ScoreRanked #8 because of its Google rating and trade focus: 5.0★ from 135 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 135 Google reviews
- Hours
- Mon–Fri 8 AM–6:30 PM · Sat–Sun 8 AM–4:30 PM
- Address
- 1038 E Bastanchury Rd #141, Fullerton, CA 92835
Based in Arcadia, 8 mi away
83/100CR ScoreRanked #9 because of its Google rating and availability: 4.7★ from 538 Google reviews, open 24/7.
- 4.7★ from 538 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 5441 Cogswell Rd Unit F, Arcadia, CA 91006
Based in Anaheim, 20 mi away
83/100CR ScoreRanked #10 because of its Google rating and review volume: 4.7★ from 2,250 Google reviews, the most Google reviews on this list (2,250).
- 4.7★ from 2,250 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 5472 E La Palma Ave, Anaheim, CA 92807
#11 Tiger Foam
Based in La Puente, 9 mi away
82/100CR ScoreRanked #11 because of its Google rating and availability: 4.0★ from 8 Google reviews, open 24/7.
- 4.0★ from 8 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 15900 Main St, La Puente, CA 91744
Based in Pasadena, 15 mi away
82/100CR ScoreRanked #12 because of its Google rating and availability: 4.9★ from 20 Google reviews, open 24/7.
- 4.9★ from 20 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 201 S Lake Ave, Pasadena, CA 91101
Based in Montclair, 11 mi away
82/100CR ScoreRanked #13 because of its Google rating and trade focus: 5.0★ from 25 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 25 Google reviews
- Hours
- Mon–Sun 7 AM–7 PM
- Address
- 4700 Brooks St, Montclair, CA 91763
Based in Rosemead, 12 mi away
82/100CR ScoreRanked #14 because of its Google rating and trade focus: 5.0★ from 25 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 25 Google reviews
- Hours
- Mon–Sun 7 AM–7 PM
- Address
- 4181 Temple City Blvd, Rosemead, CA 91770
Based in Artesia, 22 mi away
82/100CR ScoreRanked #15 because of its Google rating and availability: 4.8★ from 51 Google reviews, open 24/7.
- 4.8★ from 51 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 18173 Pioneer Blvd, Artesia, CA 90701
Based in Pomona, 10 mi away
81/100CR ScoreRanked #16 because of its Google rating and trade focus: 5.0★ from 14 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 14 Google reviews
- Hours
- Mon–Sun 7 AM–7 PM
- Address
- 1649 E Mission Blvd, Pomona, CA 91766
Based in Duarte, 6 mi away
81/100CR ScoreRanked #17 because of its Google rating and trade focus: 5.0★ from 8 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 8 Google reviews
- Hours
- Mon–Sun 7 AM–7 PM
- Address
- 1700 Evergreen St, Duarte, CA 91010
Based in Alhambra, 15 mi away
81/100CR ScoreRanked #18 because of its Google rating and availability: 4.4★ from 7 Google reviews, open 24/7.
- 4.4★ from 7 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 68 W Main St, Alhambra, CA 91801
Based in West Covina, 8 mi away
81/100CR ScoreRanked #19 because of its Google rating and trade focus: 5.0★ from 10 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 10 Google reviews
- Hours
- Mon–Sun 7 AM–8 PM
- Address
- 1519 E Amar Rd, West Covina, CA 91792
Based in Fontana, 21 mi away
81/100CR ScoreRanked #20 because of its Google rating and availability: 4.8★ from 708 Google reviews, open 24/7.
- 4.8★ from 708 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 10820 Mulberry Ave, Fontana, CA 92337
Based in Los Angeles, 24 mi away
81/100CR ScoreRanked #21 because of its Google rating and availability: 4.8★ from 48 Google reviews, open 24/7.
- 4.8★ from 48 Google reviews
- Open 24/7
- Hours
- Open 24 hours, 7 days
- Address
- 3224 S Central Ave, Los Angeles, CA 90011
Based in Chino, 11 mi away
81/100CR ScoreRanked #22 because of its Google rating and trade focus: 4.7★ from 20 Google reviews, listed on Google as “Insulation contractor”.
- 4.7★ from 20 Google reviews
- Hours
- Mon–Sun 7 AM–8 PM
- Address
- 11924 Del Mar Ave, Chino, CA 91710
Based in Bell, 22 mi away
81/100CR ScoreRanked #23 because of its Google rating and trade focus: 5.0★ from 59 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 59 Google reviews
- Hours
- Mon–Sun 8 AM–7 PM
Based in Arcadia, 9 mi away
81/100CR ScoreRanked #24 because of its Google rating and trade focus: 4.7★ from 35 Google reviews, listed on Google as “Insulation contractor”.
- 4.7★ from 35 Google reviews
- Hours
- Mon–Sun 8 AM–10 PM
- Address
- 212 E Foothill Blvd, Arcadia, CA 91006
Based in San Dimas, 4 mi away
81/100CR ScoreRanked #25 because of its Google rating and trade focus: 5.0★ from 4 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 4 Google reviews
- Hours
- Mon–Sun 7 AM–7 PM
- Address
- 409 Borrego Ct, San Dimas, CA 91773
Insulation contractors ranked #26 to #50
#1 to #25 are shown in full above. Here are #26 to #50, in CR Score order; each links to its profile. We publish the top 50 of 160 ranked insulation contractors here; the rest are on their profiles.
Also serving Glendora
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 |
|---|---|---|
| ALCAL Specialty Contracting Ontario - Home Service Division | 3.0★ (2) | 19 mi |
| All Star Install LLC | 5.0★ (2) | 17 mi |
| Bob Mezzo Plastering | 5.0★ (2) | 19 mi |
| Canyon Insulation Inc | 5.0★ (2) | 25 mi |
| Contractor Monrovia Redzone | 5.0★ (2) | 8 mi |
| Fireproofing Cleaning Service | 4.5★ (2) | 23 mi |
| Kiko's insulation corporation | 5.0★ (2) | 5 mi |
| Lone Star | 5.0★ (2) | 5 mi |
| NDM Insulation | 5.0★ (2) | 24 mi |
| Performance Contracting Inc | 5.0★ (2) | 19 mi |
| QUALITY FOAM | 5.0★ (2) | 6 mi |
| Semper fi Handyman | 2.5★ (2) | 9 mi |
| Smart Value Insulation | 5.0★ (2) | 9 mi |
| South Gate Insulation Pros | 5.0★ (2) | 22 mi |
| Thermal Energy Products | 3.0★ (2) | 23 mi |
| Thermal Nest Insulation of Anaheim | 5.0★ (2) | 20 mi |
| Titan Insulation - Pasadena | 5.0★ (2) | 15 mi |
| Vasitos Construction | 5.0★ (2) | 9 mi |
| Western Industrial Ceramics | 5.0★ (2) | 17 mi |
| Whole House Insulation | 5.0★ (1) | 4 mi |
How much do insulation contractors cost in Glendora?
National price ranges in USD, not adjusted for Glendora. 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 |
How we ranked Glendora insulation contractors
We scored 160 Glendora 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 Glendora 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 |
Insulation contractors in Glendora: frequently asked questions
Who is the best insulation contractor in Glendora?
By CR Score, the highest-ranked insulation contractor in Glendora, CA is CURA Termite and Pest Control with a CR Score of 89/100. It has 4.9★ from 859 Google reviews. It is open 24/7. Priority Attic Insulation (#2) and Brad's Insulation (#3) follow. We ranked 160 insulation contractors on 8 factors, last updated October 22, 2026.
How many insulation contractors are there in Glendora?
ContractorsRanked ranks 160 insulation contractors serving Glendora, CA. 1 of them is based in Glendora; the rest serve it from nearby towns. Another 20 within 25 mi are listed but not ranked yet. Counts are as of October 2026.
Which insulation contractors in Glendora are open 24/7?
22 ranked insulation contractors in Glendora post 24/7 hours. The highest-ranked are CURA Termite and Pest Control (#1), Priority Attic Insulation (#2) and NexGen HVAC & Plumbing (#9). Hours come from each business's Google listing as of October 2026, so call to confirm.
Which insulation contractors in Glendora work on weekends?
117 of 160 ranked insulation contractors post Saturday hours and 102 post Sunday hours. The highest-ranked open Saturdays are CURA Termite and Pest Control (#1), Priority Attic Insulation (#2) and Brad's Insulation (#3). Posted hours are office hours; crews may book weekend jobs separately.
How much does attic insulation cost in Glendora?
Attic insulation typically costs $1,700 to $2,500, with $2,100 typical (Per attic: typical range of customer-reported jobs (about $1 to $3 per sq ft). US national range). This is a national range, not adjusted for Glendora. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do Glendora insulation contractors have?
The median Google rating among 160 rated insulation contractors in Glendora is 5.0★, with a median of 15 reviews. NexGen HVAC & Plumbing has the most, 2,250 reviews, and ranks #10. We adjust ratings for review count, so a few five-star reviews cannot top the list.
How does ContractorsRanked rank insulation contractors?
Each insulation contractor gets a 0–100 CR Score from 8 published factors, led by reputation (35%), credentials (15%), review volume (10%) and recency (10%). Factors we cannot measure are left out, not scored as zero. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.
Do insulation contractors outside Glendora count in this ranking?
Yes, if they are within 25 mi of the Glendora city center, our service radius for insulation contractors. Each listing shows where the business is based and how far away it is. Proximity is 5% of the CR Score, so a nearby business gets a small edge.
Update log for Glendora
- October 2026: CR Scores recalculated for 160 insulation contractors serving Glendora.
More insulation contractors and Glendora pages
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