Greensaver has provided insulation services to homeowners & businesses in the Greater Toronto Area for over 30 years. In the past 5 years alone, we have completed over 5,000 successful insulation and draft-proofing projects across the province. 

Attic Insulation

Existing Walls & Roof Cavities

Attic Insulation

Greensaver has insulated thousands of attics in the GTA and surrounding areas. Our services include:

  • The modification of insulation to meet the current code.
  • The removal of existing insulation.
  • The addition of new insulation.

Spray Foam

Spray foam insulation is an insulation that expands and hardens to fill gaps. We use it to insulate hard-to-reach or oddly-shaped areas. After it sets, it can be trimmed and painted. Foam insulation is generally made using types of plastic, such as polystyrene or polyurethane.

Greensaver offers 2 lb closed cell and ½ lb open-cell spray foams for attic insulation. Both options are high-quality insulations that inhibit mould growth and expand to seal all cracks, resulting in a comfortable living environment.

2 lb closed cell spray foam is an all-in-one insulation that provides excellent air and vapour barriers. This vapour barrier means it does not require an additional plastic vapour barrier for renovation projects. This type of spray foam is also an ideal way to insulate ductwork in unconditioned spaces such as attics. 

In contrast, ½ lb. open-cell spray foam does not act as a vapour barrier. However, it is a great air barrier and effective at reducing sound transmission. 

Our experienced installers are thoroughly trained and certified by the Canadian Urethane Foam Contractors Association (CUFCA) and adhere to all proper spray foam processes and protocols.

Existing Walls & Roof Cavities


Cellulose insulation is composed of recycled paper products that have been treated with additives to make them fire and rodent-resistant. Therefore, cellulose insulation is the most environmentally friendly type of insulation available. 

Dense-packed cellulose is an effective method for insulating existing walls and roof cavities. Greensaver uses the state-of-the-art tubing method to fill cavities, resulting in no cold spots and significantly reduced air leakage. In addition, we drill all the holes required and fill them afterwards, which sets us apart from other insulation companies.


Foam insulation is generally made using types of plastic, such as polystyrene or polyurethane. This type of insulation is sprayed into place or made into foam boards. Since it is sprayed into place, it can seal all awkward spaces and eliminate air leakage.

For double brick and brick/ block walled homes that are uninsulated, Greensaver offers narrow cavity wall foam insulation. The method is similar to installing dense-pack cellulose except that we inject 2 lb. closed-cell polyurethane foam into narrow cavities. The foam acts as an air barrier and inhibits mould due to its low vapour permeance. 

Everything you need to know about Insulation