Top-Rated Insulation Installers in Hamilton, ON

6 local companies ranked by 344 Google reviews. Free to compare, no sign-up.

Ratings collected September 2026 · Page updated September 30, 2026

6Companies
344Google reviews
4.8★Average rating
Sep 2026Data collected
Ranked by Google reviewsNever paid forFree to compare

Short answer: The top-rated insulation installers in Hamilton are GWC Insulation (5.0★, 56 reviews), Wooly Insulation Inc (4.9★, 93 reviews), Reitzel Insulation (4.8★, 94 reviews).

Insulation installers in Hamilton, ranked 6 listed

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  1. 1
    GWC InsulationTop pickHighest rating (50+ reviews)
    5.0 (56 Google reviews)
    9541 Clapperton Rd, Hamilton, ON K0K 1C0
    Call (905) 409-0709WebsiteGoogle reviewsDirectionsEmail [email protected]
  2. 2
    Wooly Insulation IncTop pick
    4.9 (93 Google reviews)
    717 Arvin Ave., Hamilton, ON L8E 5R3
    Call (905) 643-0811WebsiteGoogle reviewsDirectionsEmail [email protected]
  3. 3
    Reitzel InsulationTop pickMost reviews
    4.8 (94 Google reviews)
    10 George St, Hamilton, ON L8P 4Y4
    Call (800) 265-8869WebsiteGoogle reviewsDirectionsEmail [email protected]
  4. 4
    Canada Energy SolutionAlso installs batteries
    4.8 (25 Google reviews)
    21 King St W 5th Floor, Hamilton, ON L8P 4W7
    Call (647) 812-5200WebsiteGoogle reviewsDirectionsEmail [email protected]
  5. 5
    Milan Insulation
    4.8 (24 Google reviews)
    801 Mohawk Rd W, Hamilton, ON L9C 6C2
    Call (416) 717-6655WebsiteGoogle reviewsDirectionsEmail [email protected]
  6. 6
    Ken Mason Insulation
    4.3 (52 Google reviews)
    1214 Stone Church Rd E, Hamilton, ON L8W 2C7
    Call (905) 387-0951WebsiteGoogle reviewsDirectionsEmail [email protected]

Together these 6 companies average 4.8★ across 344 reviews. Reitzel Insulation has the most reviews (94).

Ranked by Google rating weighted by review count, collected September 2026. Rankings are never paid for. How we rank and how we make money.

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What a insulation costs in Hamilton

Typical installed priceVaries by area

Price depends on which areas you insulate (attic, walls, basement) and how much air sealing is needed. Ask each company for a price per area and the R-value you end up with, so quotes are easy to compare.

Insulation rebates open in Hamiltonup to $6,300

That could cut your cost by up to $6,300 if you qualify. Most rebates have rules (income, your current heating, a registered contractor, approval before work starts).

Rebates: our verified program data, checked monthly. Always confirm the exact amount for your home.

Get free quotes from these insulation installers

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Why insulation matters in Hamilton

In Hamilton, the average January low is -7°C, colder than 66% of the 123 cities we track. Sealing air leaks and topping up the attic usually pays back fastest here. Basement walls and rim joists are often the next biggest heat loss in older homes.

Most rebate programs pay only after an energy assessment, and some need one before the work too. Book it first.

Source: Open-Meteo historical weather data, 2015-2024.

Before you hire a insulation installer

  1. Ask whether they will air-seal before insulating, and what they will seal (attic hatch, pot lights, pipes, top plates).
  2. Ask for the R-value before and after for each area, and the material and depth they will install.
  3. Ask whether your rebate needs an energy assessment before and after the work, and who books it.
  4. Ask how they handle ventilation and any old insulation that could contain vermiculite (asbestos risk).

Before you call anyone, check what insulation rebates you can get in Hamilton. Many programs require approval or a registered contractor before work starts.

Planning more upgrades? See the top-rated heat pump installers, solar installers, home battery installers in Hamilton.

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