R-value is the measurement of a product's resistance to heat flow.  The higher the r-value, the more resistant insulation is to heat and cold flow, and the higher the performance. A higher r-value increases energy efficiency and reduces energy costs.  

Cellulose insulation is a natural fibre product produced in Canada by Therm-O-Comfort. It is used in residential, commercial, industrial, and institutional installations, both new and retrofit. The main ingredient in cellulose is recycled newsprint, which is processed into a wool-like material, making this product highly eco-friendly. In addition to its excellent thermal resistance, cellulose is non-corrosive, fire retardant, sound absorbent, vermin resistant, non-toxic, and non-itching. 

Fibreglass insulation is made from fine glass fibres, has been used for decades, and has undergone many refinements to improve performance and reduce health risks. 

Low density foam is an open cell spray foam which is a safe and effective product for commercial, industrial, institutional, and residential applications. 

Medium density foam is a closed cell spray foam which is ideal for areas with limited space as it achieves a higher r-value per inch. This spray foam also acts as an air, vapour, and thermal barrier all-in-one. 

The attic, being the highest point of your house, is the most crucial space to insulate. As heat rises, it's important to ensure that your attic floor is insulated and no heat escapes. Insulating your attic also prevents condensation, bacteria, and mold from forming which can cause allergic reactions, skin rashes, and asthma. 

Old insulation should be removed if you suspect it to be a hazardous material such as asbestos or vermiculite. These are both hazardous materials which Home Insulation tests for through a third-party. Removal is also advised if there has been infestation, water, fire, or smoke damage. 

Air sealing prevents the movement of air through gaps and crevices. It is particularly important around doors and windows where gaps may exist between frames and wall structures. These gaps allow air to leak in and out of your home, carrying heat along with it. Skipping air sealing would be like leaving your windows open. 

If you are experiencing inconsistent room temperatures and cold drafts in the winter, you may need to upgrade your attic insulation. Signs that your attic needs to be insulated are high energy costs, and exposed floor joists and ductwork. 

According to the Ontario Building Code, the minimum value of insulation you should have in your attic is R60. This is approximately 16 inches of cellulose or 21 inches of fibreglass.