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ContractorsRanked

Best Insulation Contractors in Charleston, IL (2026)

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

The short answer

  1. 1

    Best overall in Charleston: Jessie's In Home Spray Foam, CR Score 87/100; 5.0★ from 20 Google reviews; open 24/7.

  2. 2

    Most-reviewed: Olmsted Brothers Insulation, 41 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 Charleston insulation contractors are ranked here by CR Score, from 8 published factors. 1 is open 24/7, 1 open Saturdays and 1 open Sundays, based on posted hours. The median Google rating is 5.0★ across 5 rated businesses.

Top 5 insulation contractors in Charleston at a glance

Top 5 insulation contractors in Charleston at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1Jessie's In Home Spray Foam875.0★ (20)Terre Haute, 17 mi away24/7Overall
2Olmsted Brothers Insulation844.8★ (41)Charleston—Most reviews
3Co Lab Insulation LLC784.2★ (21)Douglas, 9 mi away——
4Titus Plumbing765.0★ (5)Charleston——
5Locust Creek Enterprises, L.L.C.675.0★ (6)Mattoon, 17 mi away——

The 5 best insulation contractors in Charleston, ranked

Ordered by CR Score, a 0–100 score from 8 published factors. Paid placement never changes the order.

  2. #2 Olmsted Brothers Insulation

    Based in Charleston

    84/100CR Score

    Ranked #2 because of its Google rating and review volume: 4.8★ from 41 Google reviews, the most Google reviews on this list (41).

    Based on 6 of 8 factors; credentials and recency not yet collected.

    • 4.8★ from 41 Google reviews
    Hours
    Mon–Fri 7 AM–4 PM · Sat–Sun closed
    Address
    654 Castle Dr, Charleston, IL 61920
    View profile for Olmsted Brothers Insulation(217) 348-7931

  3. #3 Co Lab Insulation LLC

    Based in Douglas, 9 mi away

    78/100CR Score

    Ranked #3 because of its Google rating and trade focus: 4.2★ from 21 Google reviews, listed on Google as “Insulation contractor”.

    Based on 6 of 8 factors; credentials and recency not yet collected.

    • 4.2★ from 21 Google reviews
    Hours
    Mon–Fri 8 AM–4 PM · Sat–Sun closed
    View profile for Co Lab Insulation LLC(217) 235-5403

  4. #4 Titus Plumbing

    Based in Charleston

    76/100CR Score

    Ranked #4 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Plumber”.

    Based on 5 of 8 factors; credentials, recency and availability not yet collected.

    • 5.0★ from 5 Google reviews
    Address
    8997 Country Club Rd, Charleston, IL 61920
    View profile for Titus Plumbing

How much do insulation contractors cost in Charleston?

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

How much do insulation contractors cost in Charleston?
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 Charleston insulation contractors

We scored 5 Charleston 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 Charleston 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 Charleston: frequently asked questions

Who is the best insulation contractor in Charleston?

By CR Score, the highest-ranked insulation contractor in Charleston, IL is Jessie's In Home Spray Foam with a CR Score of 87/100. It has 5.0★ from 20 Google reviews. It is open 24/7. Olmsted Brothers Insulation (#2) and Co Lab Insulation LLC (#3) follow. We ranked 5 insulation contractors on 8 factors, last updated October 22, 2026.

How many insulation contractors are there in Charleston?

ContractorsRanked ranks 5 insulation contractors serving Charleston, IL. 2 of them are based in Charleston; the rest serve it from nearby towns. Counts are as of October 2026.

Which insulation contractors in Charleston are open 24/7?

1 ranked insulation contractor in Charleston posts 24/7 hours. The highest-ranked is Jessie's In Home Spray Foam (#1). Hours come from each business's Google listing as of October 2026, so call to confirm.

Which insulation contractors in Charleston work on weekends?

1 of 5 ranked insulation contractors post Saturday hours and 1 post Sunday hours. The highest-ranked open Saturdays is Jessie's In Home Spray Foam (#1). Posted hours are office hours; crews may book weekend jobs separately.

How much does attic insulation cost in Charleston?

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

What Google rating do Charleston insulation contractors have?

The median Google rating among 5 rated insulation contractors in Charleston is 5.0★, with a median of 20 reviews. Olmsted Brothers Insulation has the most, 41 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 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 Charleston count in this ranking?

Yes, if they are within 25 mi of the Charleston 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 Charleston

  1. October 2026: CR Scores recalculated for 5 insulation contractors serving Charleston.

More insulation contractors and Charleston pages