attic insulation

Heating and cooling costs can account for approximately 50-70 percent of the energy used in an average home which means that losing the heated or cooled air in your home is a big energy waste. Adding insulation to your attic will help lower your energy expenses by reducing the amount of energy you need to keep your home comfortable.

How it works

Air is a poor conductor of heat so the tiny pockets of air trapped in insulation minimizes the amount of heat which can pass between the inside and outside of your home. This means that in winter the heat stays inside a home, and in summer it stays on the outside.

How much do I need?

First you need to determine how much insulation you already have and the condition it is in. Wet, compressed and low levels of insulation can lead to reductions in energy efficiency, structural problems, and mold. When insulation becomes wet it becomes a conductor of heat rather than a resister. Structural damage occurs from wood rot and rusted steel rafters, supports, nails and screws that hold the supports together and are in contact with the wet insulation. Moisture caused by wet insulation contributes to mold.


R-values are a way of labeling the effectiveness of insulating materials. R-values vary based on the type, thickness and density of the material being used. Insulation with a higher R-value will perform better than insulation with a lower rating.

R-Value Chart


Call a professional

Correctly determining the type and amount of insulation you need is a task better left to a professional. Also, insulating an attic can be a messy proposition unless you are properly prepared for it. You also need to be aware of what needs to be insulated and what doesn’t. For example, you need to ensure insulation stays away from the soffit area of your roof line because that is where the ventilation intake takes place. Using attic baffles (rafter vents) can ensure this happens because they are purpose-built to ensure air flow into your home.

In addition to checking your existing insulation, we can also check for structural problems and signs of leaks, stains, mold, flaking or rot because uncorrected moisture problems will all reduce the effectiveness of your new insulation.

Mr. Roof Repair’s Roofing Specialists are also trained to review your ventilation, make sure your exhaust pipes are hooked up properly to the outside and are insulated, check to see if you have vapour barrier and if any pot lights are covered correctly to reduce the amount of air passing through the box.