9 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Lemmon Valley: Spray Foam Giants, CR Score 84/100; 5.0★ from 26 Google reviews; open Saturdays until 6 PM.
Most-reviewed: Gale Building Products, 39 Google reviews at 3.8★, the most of 9 ranked; ranked #5.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
9 Lemmon Valley insulation contractors are ranked here by CR Score, from 8 published factors. 4 open Saturdays and 2 open Sundays, based on posted hours. The median Google rating is 4.8★ across 9 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Spray Foam Giants | 84 | 5.0★ (26) | Sparks, 9 mi away | Sat | Overall |
| 2 | Silver State Firestop & Insulation LLC | 83 | 4.6★ (11) | Sparks, 8 mi away | Sat · Sun | — |
| 3 | ALCAL Specialty Contracting Reno - Home Service Division | 82 | 4.6★ (9) | Sparks, 10 mi away | Sat · Sun · Evenings | — |
| 4 | Havelock Wool | 77 | 4.5★ (22) | Reno, 10 mi away | — | — |
| 5 | Gale Building Products | 77 | 3.8★ (39) | Sparks, 10 mi away | — | Most reviews |
| 6 | Foam King Inc | 75 | 4.8★ (23) | Truckee, 25 mi away | — | — |
| 7 | Jakes Roofing & Coatings | 72 | 5.0★ (6) | Sun Valley, 6 mi away | Sat | — |
| 8 | Western Partitions | 70 | 5.0★ (13) | Sparks, 10 mi away | — | — |
| 9 | Go Green Roofing & Insulation | 70 | 4.8★ (6) | Spanish Springs, 11 mi away | — | — |
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.
Ranked #1 because of its Google rating and trade focus: 5.0★ from 26 Google reviews, listed on Google as “Insulation contractor”.
Based in Sparks, 8 mi away
Ranked #2 because of its Google rating and trade focus: 4.6★ from 11 Google reviews, listed on Google as “Insulation contractor”.
Based in Sparks, 10 mi away
Ranked #3 because of its Google rating and trade focus: 4.6★ from 9 Google reviews, listed on Google as “Insulation contractor”.
Based in Reno, 10 mi away
Ranked #4 because of its Google rating and trade focus: 4.5★ from 22 Google reviews, listed on Google as “Insulation contractor”.
Based in Sparks, 10 mi away
Ranked #5 because of its Google rating and review volume: 3.8★ from 39 Google reviews, the most Google reviews on this list (39).
Based in Truckee, 25 mi away
Ranked #6 because of its Google rating and trade focus: 4.8★ from 23 Google reviews, listed on Google as “Insulation contractor”.
Based in Sun Valley, 6 mi away
Ranked #7 because of its Google rating and review volume: 5.0★ from 6 Google reviews, 6 Google reviews.
Based in Sparks, 10 mi away
Ranked #8 because of its Google rating and review volume: 5.0★ from 13 Google reviews, 13 Google reviews.
Based in Spanish Springs, 11 mi away
Ranked #9 because of its Google rating and trade focus: 4.8★ from 6 Google reviews, listed on Google as “Roofing contractor”.
National price ranges in USD, not adjusted for Lemmon Valley. 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 |
We scored 9 Lemmon Valley 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.
| Factor | Weight | Computed from | In Lemmon Valley data |
|---|---|---|---|
| Reputation | 35% | Bayesian-adjusted Google star rating | Measured |
| Credentials | 15% | Active state license 0.6, bond 0.2, workers’ comp 0.2 | Not yet collected |
| Review volume | 10% | log10(reviews + 1) against the list maximum | Measured |
| Recency | 10% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 10% | Weekly open hours, Saturday, Sunday, 24/7 or same-day | Measured |
| Trade focus | 10% | Google main category 1.0, business name 0.7, additional category 0.5 | Measured |
| Proximity | 5% | 1.0 when based in the city, falling to 0 at the trade’s radius | Measured |
| Completeness | 5% | Website, photos, description, hours, claimed profile (0.2 each) | Measured |