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ContractorsRanked

Best Insulation Contractors in Norco, CA (2026)

142 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →

The short answer

  1. 1

    Best overall in Norco: Gopher Patrol, CR Score 90/100; 4.9★ from 182 Google reviews; open 24/7.

  2. 2

    Best for emergencies (open 24/7): NexGen HVAC & Plumbing, posts 24/7 hours; ranked #2 of 142.

  3. 5

    Most-reviewed: RighTime Home Services, 3,741 Google reviews at 4.7★, the most of 142 ranked; ranked #5.

Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank

142 Norco insulation contractors are ranked here by CR Score, from 8 published factors. 24 are open 24/7, 106 open Saturdays and 91 open Sundays, based on posted hours. The median Google rating is 5.0★ across 142 rated businesses.

Most of this list also appears on the Insulation contractors in San Bernardino ranking. See Insulation contractors in San Bernardino

Top 10 insulation contractors in Norco at a glance

Top 10 insulation contractors in Norco at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1Gopher Patrol904.9★ (182)Riverside, 4 mi away24/7Overall
2NexGen HVAC & Plumbing894.7★ (1,769)Riverside, 16 mi away24/7Emergencies
3CURA Termite and Pest Control884.9★ (859)Anaheim, 21 mi away24/7—
4My Insulation Guy874.9★ (155)Riverside, 4 mi awaySat · Sun · Evenings—
5RighTime Home Services864.7★ (3,741)Corona, 8 mi away24/7Most reviews
6Attic Projects865.0★ (168)Rancho Cucamonga, 11 mi awaySat · Sun · Evenings—
7Attic Projects854.9★ (584)Orange, 21 mi awaySat · Sun · Evenings—
8Attic Advisor845.0★ (37)Riverside, 4 mi awaySat · Sun · Evenings—
9NexGen HVAC & Plumbing844.8★ (708)Fontana, 9 mi away24/7—
10Ameriwest Home Services845.0★ (203)Riverside, 6 mi awaySat—

The 142 best insulation contractors in Norco, 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.

  1. Ranked #1 in Norco

    #1 Gopher Patrol

    Based in Riverside, 4 mi away

    90/100CR Score

    Ranked #1 because of its Google rating and availability: 4.9★ from 182 Google reviews, open 24/7.

    • 4.9★ from 182 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    12155 Magnolia Ave Ste. 10B, Riverside, CA 92503
    View profile for Gopher Patrol(951) 899-3392

  4. #4 My Insulation Guy

    Based in Riverside, 4 mi away

    87/100CR Score

    Ranked #4 because of its Google rating and trade focus: 4.9★ from 155 Google reviews, listed on Google as “Insulation contractor”.

    • 4.9★ from 155 Google reviews
    Hours
    Mon–Thu 7 AM–8 PM · Fri 7 AM–7 PM · Sat–Sun 7 AM–8 PM
    Address
    4193 Flat Rock Rd suite 200, Riverside, CA 92505
    View profile for My Insulation Guy(951) 527-7283

  6. #6 Attic Projects

    Based in Rancho Cucamonga, 11 mi away

    86/100CR Score

    Ranked #6 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
    View profile for Attic Projects(951) 875-6681

  7. #7 Attic Projects

    Based in Orange, 21 mi away

    85/100CR Score

    Ranked #7 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
    View profile for Attic Projects(714) 769-0228

  8. #8 Attic Advisor

    Based in Riverside, 4 mi away

    84/100CR Score

    Ranked #8 because of its Google rating and trade focus: 5.0★ from 37 Google reviews, listed on Google as “Insulation contractor”.

    • 5.0★ from 37 Google reviews
    Hours
    Mon–Fri 9 AM–7 PM · Sat–Sun 9 AM–5 PM
    Address
    11801 Pierce St Suite 200, Riverside, CA 92505
    View profile for Attic Advisor(714) 488-9819

  10. #10 Ameriwest Home Services

    Based in Riverside, 6 mi away

    84/100CR Score

    Ranked #10 because of its Google rating and trade focus: 5.0★ from 203 Google reviews, listed on Google as “Insulation contractor”.

    • 5.0★ from 203 Google reviews
    Hours
    Mon–Fri 8 AM–5 PM · Sat 8 AM–2 PM · Sun closed
    Address
    9960 Indiana Ave suite16, Riverside, CA 92503
    View profile for Ameriwest Home Services(714) 262-1317

  15. #15 Insulation Labs

    Based in Fullerton, 21 mi away

    83/100CR Score

    Ranked #15 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
    View profile for Insulation Labs(714) 451-7110

  16. #16 SoCal Airflow Pros

    Based in Rancho Santa Margarita, 21 mi away

    82/100CR Score

    Ranked #16 because of its Google rating and availability: 4.9★ from 1,005 Google reviews, open 24/7.

    • 4.9★ from 1,005 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    29816 Avenida de las Banderas, Rancho Santa Margarita, CA 92688
    View profile for SoCal Airflow Pros(949) 393-0434

  17. #17 Rodent Free

    Based in Santa Ana, 23 mi away

    82/100CR Score

    Ranked #17 because of its Google rating and availability: 5.0★ from 22 Google reviews, open 24/7.

    • 5.0★ from 22 Google reviews
    • Open 24/7
    Hours
    Open 24 hours, 7 days
    Address
    600 W Santa Ana Blvd Ste 114a #240, Santa Ana, CA 92701
    View profile for Rodent Free(714) 760-3227

  24. #24 Attic Construction

    Based in Santa Ana, 23 mi away

    80/100CR Score

    Ranked #24 because of its Google rating and trade focus: 4.9★ from 79 Google reviews, listed on Google as “Insulation contractor”.

    • 4.9★ from 79 Google reviews
    Hours
    Mon–Fri 8 AM–7 PM · Sat 9 AM–4 PM · Sun 10 AM–5 PM
    Address
    2103 S Standard Ave, Santa Ana, CA 92707
    View profile for Attic Construction(951) 877-3441

How much do insulation contractors cost in Norco?

National price ranges in USD, not adjusted for Norco. Each row names its basis and the month we checked it.

How much do insulation contractors cost in Norco?
JobLowTypicalHighBasisChecked
Attic insulation$1,700$2,100$2,500Per attic: typical range of customer-reported jobs (about $1 to $3 per sq ft). US national rangeOctober 2026

How we ranked Norco insulation contractors

We scored 142 Norco 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.

Read the full method: formula, sources and exclusions

CR Score factors and weights
FactorWeightComputed fromIn Norco data
Reputation35%Bayesian-adjusted Google star ratingMeasured
Credentials15%Active state license 0.6, bond 0.2, workers’ comp 0.2Not yet collected
Review volume10%log10(reviews + 1) against the list maximumMeasured
Recency10%Share of reviews from the last 12 monthsNot yet collected
Availability10%Weekly open hours, Saturday, Sunday, 24/7 or same-dayMeasured
Trade focus10%Google main category 1.0, business name 0.7, additional category 0.5Measured
Proximity5%1.0 when based in the city, falling to 0 at the trade’s radiusMeasured
Completeness5%Website, photos, description, hours, claimed profile (0.2 each)Measured

Insulation contractors in Norco: frequently asked questions

Who is the best insulation contractor in Norco?

By CR Score, the highest-ranked insulation contractor in Norco, CA is Gopher Patrol with a CR Score of 90/100. It has 4.9★ from 182 Google reviews. It is open 24/7. NexGen HVAC & Plumbing (#2) and CURA Termite and Pest Control (#3) follow. We ranked 142 insulation contractors on 8 factors, last updated October 22, 2026.

Which insulation contractors in Norco are open 24/7?

24 ranked insulation contractors in Norco post 24/7 hours. The highest-ranked are Gopher Patrol (#1), NexGen HVAC & Plumbing (#2) and CURA Termite and Pest Control (#3). Hours come from each business's Google listing as of October 2026, so call to confirm.

Which insulation contractors in Norco work on weekends?

106 of 142 ranked insulation contractors post Saturday hours and 91 post Sunday hours. The highest-ranked open Saturdays are Gopher Patrol (#1), NexGen HVAC & Plumbing (#2) and CURA Termite and Pest Control (#3). Posted hours are office hours; crews may book weekend jobs separately.

How much does attic insulation cost in Norco?

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 Norco. Prices were last checked October 2026. Get at least two written quotes before you hire.

What Google rating do Norco insulation contractors have?

The median Google rating among 142 rated insulation contractors in Norco is 5.0★, with a median of 23 reviews. RighTime Home Services has the most, 3,741 reviews, and ranks #5. 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 Norco count in this ranking?

Yes, if they are within 25 mi of the Norco 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.

Can insulation contractors pay to rank higher on ContractorsRanked?

No. The CR Score never reads payment status, and this ranking has 0 paid placements. Up to 3 Featured businesses may appear above the list, labelled Featured and showing their honest rank.

Update log for Norco

  1. October 2026: CR Scores recalculated for 142 insulation contractors serving Norco.
  2. October 2026: 2 duplicate listings merged.

More insulation contractors and Norco pages

Other trades in Norco