We are a professional insulation company proudly serving the Greater Toronto Area.

Attic Insulation

Maximize your home's energy efficiency and year-round comfort with professional attic insulation. In the GTA climate, heat loss through the attic can account for over 25% of your energy bill. Our certified team installs high-performance insulation materials that meet or exceed Ontario building code standards, helping you save on heating costs while improving indoor air quality.

Whether you're upgrading outdated insulation or insulating a new home, we assess your attic’s current R-value and recommend the best solution — from blown-in cellulose to spray foam. We also ensure proper ventilation and air sealing to prevent moisture issues and mold growth.

* Energy savings
* Government rebate eligible
* Fast, mess-free installation

Insulation Removal

Old, damaged, or contaminated insulation can do more harm than good — leading to poor energy efficiency, moisture issues, and potential health risks. Our Insulation Removal service ensures your attic or walls are safely cleared of outdated materials before installing fresh, high-performance insulation.

We use powerful vacuum systems and follow strict safety protocols to remove fiberglass, cellulose, or mold-affected insulation without contaminating your living space. Whether you're upgrading for energy rebates, renovating, or addressing a pest or water issue, we provide clean, efficient removal and disposal across the GTA.

* Clean & safe process
* Mold or rodent-damaged insulation handled
* Ideal before upgrading to high-R-value insulation

Bathroom Fan Pipe

Properly venting your bathroom fan is essential to prevent excess moisture, mold growth, and long-term damage in your attic. In many GTA homes, fan ducts are either poorly insulated or venting directly into the attic — a major building code violation and source of hidden issues.

Our team ensures your bathroom exhaust fan is connected to an insulated, sealed pipe that vents directly outside, not into your attic. We use durable, R-rated ducting and apply spray foam or insulation wrap to prevent condensation, heat loss, and frost buildup during winter.

* Prevents mold & attic moisture
* Meets Ontario Building Code standards
* Enhances bathroom air quality and home energy efficiency

Basement Insulation

Basements are one of the biggest sources of heat loss in GTA homes. Without proper insulation, cold air infiltration, moisture buildup, and mold can quickly become a problem — especially during harsh Ontario winters.

Our team provides full basement insulation solutions, from foundation walls to rim joists. We use high-performance materials like spray foam, rigid boards, or batt insulation depending on the structure and your goals.

* Reduces energy loss and heating bills
* Helps prevent moisture, mold, and air drafts
* Keeps your basement dry, warm, and code-compliant

Wall Insulation

Uninsulated or poorly insulated walls are a major cause of heat loss and uncomfortable indoor temperatures — especially in older GTA homes. They can also lead to cold drafts, condensation, and higher energy bills.

We install high-efficiency wall insulation that meets Ontario standards, whether you're renovating, finishing a basement, or building new. Our team works with blown-in, batt, or spray foam insulation based on your wall type and project scope.

* Improves year-round indoor comfort
* Reduces energy waste and monthly costs
* Enhances soundproofing and air sealing

Mold Removal

Mold in your attic or walls is more than just unsightly — it’s a serious health hazard and a sign of excess moisture or poor ventilation. Left untreated, it can spread quickly and damage insulation, wood, and air quality in your home.

Our team uses professional-grade solutions to safely remove mold from contaminated areas, followed by proper air sealing and insulation repair to prevent it from returning.

* Stops mold at the source and prevents regrowth
* Restores safe, healthy air quality
* Protects insulation, wood, and your home’s structure

Garage Insulation

An uninsulated garage can significantly impact your home's overall comfort and energy efficiency — especially if there's a room above or an interior wall shared with your house. Cold air, drafts, and noise easily transfer into your living space.

We provide garage insulation solutions for walls, ceilings, and garage doors, using high-quality materials that meet Ontario standards and boost thermal performance.

* Keeps adjacent rooms warmer in winter and cooler in summer
* Reduces noise and energy loss through shared walls
* Ideal for attached garages, workshops, or converted spaces

At The Great Insulation, we deliver professional insulation services across Toronto and the GTA. Our expertise includes attic insulation, basement insulation, wall insulation, and more for both homes and businesses.