Understanding Insulation

When it comes to insulation, it’s basically a question of heat transfer. Heat transfer otherwise known as heat flow comes in three types basically. This flow of heat through matter is usually the major reason for energy inefficiency in homes since it is primarily the cause of heat loss. For any building, whether commercial or residential, there is always an envelope that will influence positively or negatively the way in which heat transfer takes place. These three heat transfer types are:

Conduction or thermal conductione

Conduction involves the transfer of heat from one solid matter to another. Some solid materials transfer heat much faster and conveniently than others. A steel metal, for example, transfers heat when it comes in contact with a thick cotton towel. The fact that this heat transfer is taking place when it should not be happening means that energy is being lost. By placing an insulating layer between the two objects, unwanted heat transfer can greatly be reduced. The insulation effectiveness of an insulator can be measured by calculating the resistance factor in which case is equivalent to the R-value when it comes to an insulation product. The effectiveness of the insulator is directly related to the R-value.


When heated air moves away from its source, it constitutes convection. Convection usually occurs in a cycle where warm air rises and is replaced by cooler air. Convection mostly occurs when there is fluctuation in the atmosphere- when the levels of humidity change, or when there is constant air movement.

The intrusion of air or air infiltration takes place when the moving air goes in or out of the building through various openings like cracks and crevices. This is what most plumbers refer to as air leakage. To stop this infiltration, these holes need to be completely sealed using the appropriate insulation methods.


This is the heat that travels by light waves through space. Radiation requires no physical medium during the heat transfer process. A perfect example is the way in which light bulbs transfer heat. When insulating against radiated heat, you could install material to counter and reduce the heat transfer such as an aluminum sheet.

Choosing the right insulation for the job

There are several factors to consider when selecting the right insulation for your particular problem. One of the most important factors should be the R-value as you want an insulation that exhibits maximum insulating capabilities. Insulation should also inhibit characteristics such as resistance to mold and insects, especially if you’re insulation is geared toward preventing convection.

Since insulating a space is aimed at energy conservation, the right insulating material should be the one that best translates to energy savings. Spray polyurethane foam is usually the recommended insulation type for attics due to their susceptibility to air leaks. The foam has special capabilities to completely cover a hole and crevice in the attic, preventing any form of air entry.

Most of our insulation products at Spray Foam GTA are designed to block the entry and loss of heat in a building. Once a dent in the wall is completely covered, you can be assured of heat loss prevention.

Specialist Spray foam in the Attic

While some of these may appear insignificant to the common observer, their impact on your energy cost over the long term is immense. Our technicians will take a look at your home and identify all areas that require sealing before commencing work. It is advisable to remove any items stored in attics and other heavy work areas in advance so as to make the insulation job quicker and more efficient.

To receive a free quotation for your home’s spray foam insulation, call us on 1-647-973-3626.