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Best Insulation Contractors in Berlin, WI (2026)

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

The short answer

  1. 1

    Best overall in Berlin: Maximum R Spray Foam, CR Score 84/100; 5.0★ from 10 Google reviews; open Saturdays until 5 PM.

  2. 4

    Most-reviewed: Rock Road Company, 26 Google reviews at 5.0★, the most of 5 ranked; ranked #4.

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

5 Berlin insulation contractors are ranked here by CR Score, from 8 published factors. 3 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 Berlin at a glance

Top 5 insulation contractors in Berlin at a glance
RankBusinessCR ScoreGoogle ratingBased inHoursBest for
1Maximum R Spray Foam845.0★ (10)Ripon, 6 mi awaySatOverall
2Spraytech Insulators of Oshkosh824.8★ (18)Oshkosh, 8 mi away——
3Bart's Insulation Solutions, LLC.805.0★ (3)Oshkosh, 17 mi awaySat · Sun · Evenings—
4Rock Road Company805.0★ (26)Waupaca, 23 mi away—Most reviews
5Lumpy’s Home Renovations, LLC674.0★ (4)Oshkosh, 24 mi awaySat · Evenings—

The 5 best insulation contractors in Berlin, 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.

  4. #4 Rock Road Company

    Based in Waupaca, 23 mi away

    80/100CR Score

    Ranked #4 because of its Google rating and review volume: 5.0★ from 26 Google reviews, the most Google reviews on this list (26).

    • 5.0★ from 26 Google reviews
    Hours
    Mon–Fri 7 AM–5 PM · Sat–Sun closed
    Address
    E5917 Haffner Rd Ste. A, Weyauwega, WI 54983
    View profile for Rock Road Company(920) 757-1050

How much do insulation contractors cost in Berlin?

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

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

We scored 5 Berlin 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 Berlin 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 Berlin: frequently asked questions

Who is the best insulation contractor in Berlin?

By CR Score, the highest-ranked insulation contractor in Berlin, WI is Maximum R Spray Foam with a CR Score of 84/100. It has 5.0★ from 10 Google reviews. It is open Saturdays until 5 PM. Spraytech Insulators of Oshkosh (#2) and Bart's Insulation Solutions, LLC. (#3) follow. We ranked 5 insulation contractors on 8 factors, last updated October 22, 2026.

Which insulation contractors in Berlin work on weekends?

3 of 5 ranked insulation contractors post Saturday hours and 1 post Sunday hours. The highest-ranked open Saturdays are Maximum R Spray Foam (#1), Bart's Insulation Solutions, LLC. (#3) and Lumpy’s Home Renovations, LLC (#5). Posted hours are office hours; crews may book weekend jobs separately.

How much does attic insulation cost in Berlin?

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

What Google rating do Berlin insulation contractors have?

The median Google rating among 5 rated insulation contractors in Berlin is 5.0★, with a median of 10 reviews. Rock Road Company has the most, 26 reviews, and ranks #4. 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 Berlin count in this ranking?

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

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

More insulation contractors and Berlin pages