59/100CR Score
Ranked #1 because of its Google rating and trade focus: 5.0★ from 30 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 30 Google reviews
- Hours
- Mon–Sun 8 AM–6 PM
Best Insulation Contractors in Union, SC (2026)
8 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Union: Greenville Spray Foam Insulation, CR Score 59/100; 5.0★ from 30 Google reviews; open 7 days a week.
- 6
Most-reviewed: All-Dry of the Carolinas, 98 Google reviews at 4.6★, the most of 8 ranked; ranked #6.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
8 Union insulation contractors are ranked here by CR Score, from ten published factors. 3 open Saturdays and 1 open Sundays, based on posted hours. The median Google rating is 4.8★ across 8 rated businesses.
Top 8 insulation contractors in Union at a glance
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Greenville Spray Foam Insulation | 59 | 5.0★ (30) | Berea, 16 mi away | Sat · Sun | Overall |
| 2 | South Carolina Spray Foam Insulation | 55 | 4.9★ (19) | Greer, 12 mi away | — | — |
| 3 | Foam Insulation Company | 52 | 4.7★ (14) | Spartanburg, 20 mi away | — | — |
| 4 | Extreme Spray Foam of Spartanburg | 51 | 5.0★ (11) | Greer, 23 mi away | — | — |
| 5 | Palmetto Gutters & Insulation | 49 | 5.0★ (12) | Greer, 23 mi away | Sat · Evenings | — |
| 6 | All-Dry of the Carolinas | 49 | 4.6★ (98) | Clinton, 24 mi away | — | Most reviews |
| 7 | Finley Insulators | 48 | 3.8★ (4) | Greer, 23 mi away | — | — |
| 8 | Carolyn Basement Technologies LLC | 48 | 4.8★ (25) | Laurens, 25 mi away | Sat | — |
The 8 best insulation contractors in Union, 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 Greer, 12 mi away
55/100CR ScoreRanked #2 because of its Google rating and trade focus: 4.9★ from 19 Google reviews, listed on Google as “Insulation contractor”.
- 4.9★ from 19 Google reviews
- Hours
- Mon–Fri 8 AM–6 PM · Sat–Sun closed
Based in Spartanburg, 20 mi away
52/100CR ScoreRanked #3 because of its Google rating and trade focus: 4.7★ from 14 Google reviews, listed on Google as “Insulation contractor”.
- 4.7★ from 14 Google reviews
- Hours
- Mon–Fri 7 AM–4:30 PM · Sat–Sun closed
- Address
- 2991 S Pine St, Spartanburg, SC 29302
Based in Greer, 23 mi away
51/100CR ScoreRanked #4 because of its Google rating and trade focus: 5.0★ from 11 Google reviews, listed on Google as “Insulation contractor”.
- 5.0★ from 11 Google reviews
- Hours
- Mon–Fri 8 AM–6 PM · Sat–Sun closed
Based in Greer, 23 mi away
49/100CR ScoreRanked #5 because of its Google rating and trade focus: 5.0★ from 12 Google reviews, listed on Google as “Gutter cleaning service”.
- 5.0★ from 12 Google reviews
- Hours
- Mon–Sat 7 AM–7 PM · Sun closed
Based in Clinton, 24 mi away
49/100CR ScoreRanked #6 because of its Google rating and review volume: 4.6★ from 98 Google reviews, the most in Union.
- 4.6★ from 98 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat–Sun closed
Based in Greer, 23 mi away
48/100CR ScoreRanked #7 because of its Google rating and trade focus: 3.8★ from 4 Google reviews, listed on Google as “Insulation contractor”.
- 3.8★ from 4 Google reviews
- Hours
- Mon–Fri 7 AM–5:30 PM · Sat–Sun closed
Based in Laurens, 25 mi away
48/100CR ScoreRanked #8 because of its Google rating and review volume: 4.8★ from 25 Google reviews.
- 4.8★ from 25 Google reviews
- Hours
- Mon–Fri 8 AM–5 PM · Sat 8 AM–2 PM · Sun closed
- Address
- 58 Larchmont Rd, Laurens, SC 29360
How much do insulation contractors cost in Union?
National price ranges in USD, not adjusted for Union. 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 Union insulation contractors
We scored 8 Union 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 Union 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 Union: frequently asked questions
Who is the best insulation contractor in Union?
By CR Score, the highest-ranked insulation contractor in Union, SC is Greenville Spray Foam Insulation with a CR Score of 59/100. It has 5.0★ from 30 Google reviews. It is open 7 days a week. South Carolina Spray Foam Insulation (#2) and Foam Insulation Company (#3) follow. We ranked 8 insulation contractors on ten factors, last updated October 22, 2026.
Which insulation contractors in Union work on weekends?
3 of 8 ranked insulation contractors post Saturday hours and 1 post Sunday hours. The highest-ranked open Saturdays are Greenville Spray Foam Insulation (#1), Palmetto Gutters & Insulation (#5) and Carolyn Basement Technologies LLC (#8). Posted hours are office hours; crews may book weekend jobs separately.
How much does attic insulation cost in Union?
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 Union. Prices were last checked October 2026. Get at least two written quotes before you hire.
What Google rating do Union insulation contractors have?
The median Google rating among 8 rated insulation contractors in Union is 4.8★, with a median of 17 reviews. All-Dry of the Carolinas has the most, 98 reviews, and ranks #6. 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 Union count in this ranking?
Yes, if they are within 25 mi of the Union 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 Union
- October 2026: CR Scores recalculated for 8 insulation contractors serving Union.
More insulation contractors and Union pages
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