61/100CR Score
Ranked #1 because of its Google rating and trade focus: 5.0★ from 26 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 26 Google reviews
- Hours
- Mon–Sat 6 AM–10 PM · Sun closed
Best Insulation Contractors in Porterville, CA (2026)
5 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Porterville: CAL FOAM Inc., CR Score 61/100; 5.0★ from 26 Google reviews; open Saturdays until 10 PM.
- 2
Most-reviewed: Shaw's Home Comfort, 108 Google reviews at 4.8★, the most of 5 ranked; ranked #2.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
5 Porterville insulation contractors are ranked here by CR Score, from ten published factors. 3 open Saturdays and 2 open Sundays, based on posted hours. The median Google rating is 4.8★ across 5 rated businesses.
Most of this list also appears on the Insulation contractors in Visalia ranking. See Insulation contractors in Visalia
Top 5 insulation contractors in Porterville at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | CAL FOAM Inc. | 61 | 5.0★ (26) | Porterville | Sat · Evenings | Overall |
| 2 | Shaw's Home Comfort | 60 | 4.8★ (108) | Porterville | Sat · Sun · Evenings | Most reviews |
| 3 | Shaw's Home Comfort | 53 | 4.8★ (98) | Visalia, 24 mi away | Sat · Sun · Evenings | — |
| 4 | Dryvit Systems | 51 | 4.0★ (25) | Woodlake, 24 mi away | — | — |
| 5 | Visalia Roofing & Construction | 51 | 4.8★ (72) | Visalia, 19 mi away | — | — |
The 5 best insulation contractors in Porterville, ranked
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.
Based in Porterville
60/100CR ScoreRanked #2 because of its Google rating and review volume: 4.8★ from 108 Google reviews, the most in Porterville.
- 4.8★ from 108 Google reviews
- Hours
- Mon–Sun 8 AM–8 PM
- Address
- 263 N 3rd St suite 117, Porterville, CA 93257
Based in Visalia, 24 mi away
53/100CR ScoreRanked #3 because of its Google rating and review volume: 4.8★ from 98 Google reviews.
- 4.8★ from 98 Google reviews
- Hours
- Mon–Sun 8 AM–8 PM
- Address
- 309 W Main St #105, Visalia, CA 93291
Based in Woodlake, 24 mi away
51/100CR ScoreRanked #4 because of its Google rating and trade focus: 4.0★ from 25 Google reviews, listed on Google as “Insulation contractor”.
- 4.0★ from 25 Google reviews
- Hours
- Mon–Fri 5 AM–5 PM · Sat–Sun closed
- Address
- 354 S Acacia St, Woodlake, CA 93286
Based in Visalia, 19 mi away
51/100CR ScoreRanked #5 because of its Google rating and review volume: 4.8★ from 72 Google reviews.
- 4.8★ from 72 Google reviews
- Hours
- Mon–Fri 6 AM–5 PM · Sat–Sun closed
- Address
- 14635 Ave 260, Visalia, CA 93292
How much do insulation contractors cost in Porterville?
National price ranges in USD, not adjusted for Porterville. 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 Porterville insulation contractors
We scored 5 Porterville 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 Porterville 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 |
Insulation contractors in Porterville: frequently asked questions
Who is the best insulation contractor in Porterville?
By CR Score, the highest-ranked insulation contractor in Porterville, CA is CAL FOAM Inc. with a CR Score of 61/100. It has 5.0★ from 26 Google reviews. It is open Saturdays until 10 PM. Shaw's Home Comfort (#2) and Shaw's Home Comfort (#3) follow. We ranked 5 insulation contractors on ten factors, last updated October 22, 2026.
How many insulation contractors are there in Porterville?
ContractorsRanked ranks 5 insulation contractors serving Porterville, CA. 2 of them are based in Porterville; the rest serve it from nearby towns. Counts are as of October 2026.
Which insulation contractors in Porterville work on weekends?
3 of 5 ranked insulation contractors post Saturday hours and 2 post Sunday hours. The highest-ranked open Saturdays are CAL FOAM Inc. (#1), Shaw's Home Comfort (#2) and Shaw's Home Comfort (#3). Posted hours are office hours; crews may book weekend jobs separately.
How much does attic insulation cost in Porterville?
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 Porterville. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do Porterville insulation contractors have?
The median Google rating among 5 rated insulation contractors in Porterville is 4.8★, with a median of 72 reviews. Shaw's Home Comfort has the most, 108 reviews, and ranks #2. 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 ten published factors, led by reputation (25%), credentials (15%), review volume (10%) and trade focus (10%). A business with no Google reviews scores zero on rating, review volume and recency; other factors we cannot measure are left out. Only businesses with a confirmed trade and 3 or more reviews, or a claimed profile, are ranked.
Do insulation contractors outside Porterville count in this ranking?
Yes, if they are within 25 mi of the Porterville 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 Porterville
- October 2026: CR Scores recalculated for 5 insulation contractors serving Porterville.
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