14 insulation contractors ranked by CR ScoreUpdated 0 paid placements in this rankingHow we rank →
Best overall in Nanaimo: Top Trade Insulation and Attic, CR Score 63/100; 4.9★ from 190 Google reviews.
Best for emergencies (open 24/7): Nick's Insulation, posts 24/7 hours; ranked #2 of 14.
Most-reviewed: Shoreline Building Performance, 45 Google reviews at 4.9★, the most of 14 ranked after Top Trade Insulation and Attic; ranked #4.
Rankings can't be bought. Contractors can't pay to change their rank or score. How we rank
14 Nanaimo insulation contractors are ranked here by CR Score, from ten published factors. 3 are open 24/7, 8 open Saturdays and 6 open Sundays, based on posted hours. The median Google rating is 5.0★ across 14 rated businesses.
| Rank | Business | CR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | Top Trade Insulation and Attic | 63 | 4.9★ (190) | Nanaimo | — | Overall |
| 2 | Nick's Insulation | 62 | 4.8★ (22) | Nanaimo | 24/7 | Emergencies |
| 3 | Harbourside Spray Foam | 61 | 4.9★ (28) | Nanaimo | Sat · Sun | — |
| 4 | Shoreline Building Performance | 59 | 4.9★ (45) | Nanaimo | — | Most reviews |
| 5 | Gabriola Services and Media Solutions | 59 | 5.0★ (10) | Nanaimo | Sat · Sun | — |
| 6 | EcoTek Spray Foam Ltd | 58 | 5.0★ (10) | Nanaimo | Sat · Sun | — |
| 7 | Insulation Nanaimo | 56 | 5.0★ (6) | Nanaimo | Sat · Evenings | — |
| 8 | Insulpro Insulation Inc | 56 | 5.0★ (5) | Nanaimo | — | — |
| 9 | RAFTER B INSULATION LTD | 55 | 5.0★ (9) | Nanaimo | — | — |
| 10 | Bar Kat Insulation Ltd. | 54 | 5.0★ (8) | Sechelt, 37 km away | 24/7 | — |
Ordered by CR Score, a 0–100 score from ten published factors. Paid placement never changes the order.
Ranked #1 because of its Google rating and review volume: 4.9★ from 190 Google reviews, the most in Nanaimo.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Nanaimo
Ranked #2 because of its Google rating and trade focus: 4.8★ from 22 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Nanaimo
Ranked #3 because of its Google rating and trade focus: 4.9★ from 28 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Nanaimo
Ranked #4 because of its Google rating and trade focus: 4.9★ from 45 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Nanaimo
Ranked #5 because of its Google rating and trade focus: 5.0★ from 10 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Nanaimo
Ranked #6 because of its Google rating and trade focus: 5.0★ from 10 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Nanaimo
Ranked #7 because of its Google rating and trade focus: 5.0★ from 6 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Nanaimo
Ranked #8 because of its Google rating and trade focus: 5.0★ from 5 Google reviews, listed on Google as “Insulation contractor”.
Based on 7 of 10 factors; credentials, recency and availability not yet collected.
Based in Nanaimo
Ranked #9 because of its Google rating and trade focus: 5.0★ from 9 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sechelt, 37 km away
Ranked #10 because of its Google rating and trade focus: 5.0★ from 8 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Nanaimo
Ranked #11 because of its Google rating and trade focus: 3.8★ from 9 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Salt Spring Island, 37 km away
Ranked #12 because of its Google rating and trade focus: 5.0★ from 38 Google reviews, listed on Google as “Insulation contractor”.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in Sooke, 9 km away
Ranked #13 because of its Google rating and review volume: 4.8★ from 28 Google reviews.
Based on 8 of 10 factors; credentials and recency not yet collected.
Based in North Cowichan, 31 km away
Ranked #14 because of its Google rating and availability: 3.9★ from 11 Google reviews, open 24/7.
Based on 8 of 10 factors; credentials and recency not yet collected.
20 more insulation contractors within 40 km that we can't rank yet: too few reviews, or a trade we couldn't confirm. Listed A to Z.
| Business | Google rating | Distance |
|---|---|---|
| Arbutus Remediations | 5.0★ (19) | In Nanaimo |
| Best on Top Roofing | 4.2★ (135) | In Nanaimo |
| Deconstructors | 5.0★ (14) | In Nanaimo |
| Diverse Drywall | 5.0★ (10) | In Nanaimo |
| DKI Pro Pacific | 3.8★ (46) | In Nanaimo |
| Ecoline Windows and Doors Nanaimo | 4.7★ (290) | In Nanaimo |
| Gerry King Plumbing & Heating | 5.0★ (14) | In Nanaimo |
| Island Kiwi Construction | 5.0★ (6) | In Nanaimo |
| Lanson's Drywall Systems Ltd | 3.6★ (21) | In Nanaimo |
| Lone Wolf HVAC Ltd. | 5.0★ (23) | In Nanaimo |
| Nanaimo Drywall | 4.5★ (8) | In Nanaimo |
| Pacific Decontamination Services | 5.0★ (60) | In Nanaimo |
| Pheasant Hill Homes Ltd | 4.5★ (11) | In Nanaimo |
| Phoenix Siding Ltd | 4.9★ (41) | In Nanaimo |
| Ron's Drywall Ltd. | 4.0★ (23) | In Nanaimo |
| Roof Pro the Rain Stoppers | 4.7★ (26) | In Nanaimo |
| Scotts Mobile Home Services | 4.3★ (6) | In Nanaimo |
| Van Isle Stucco | 4.8★ (9) | In Nanaimo |
| WINMAR Property Restoration Specialists - Nanaimo | 4.2★ (17) | In Nanaimo |
| Zone Garage Vancouver Island | 4.9★ (19) | In Nanaimo |
US national ranges converted to CAD, not adjusted for Nanaimo. Each row names its basis and the month we checked it.
| Job | Low | Typical | High | Basis | Checked |
|---|---|---|---|---|---|
| Attic insulation | CA$2,390 | CA$2,950 | CA$3,510 | Per attic: typical range of customer-reported jobs (about $1 to $3 per sq ft). US national range converted at 1.4054 CAD per USD (Bank of Canada, October 20, 2026) | October 2026 |
We scored 14 Nanaimo 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 Nanaimo 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 |