The majority of homes in North America especially Toronto are insulated with an air-use insulator, either fiberglass, or cellulose. Dead air and the principles of convection and advection (R-factor) are how these materials are expected to insulate our homes and buildings. The issue lies in that the thermal dynamics working against the envelope of the building are more powerful and intricate than the air use insulator can control. For example, the R-30 loose fill in the majority of attics; in just a couple of hours, radiant heat can build up in your attic to 60 degrees celsius and completely pass through the R-30 and start heating up your house while jacking up the power bill, this is especially true if you have an HVAC system where the ducts and vents are in the attic. Your house should be cooling down when the sun sets, but the air-use insulator will retain the heat and not allow for the house to cool down for several hours.
Conventional insulation really becomes energy hungry in the winter time. When indoor air is heated and the house becomes like a hot air balloon. When the air is heated, it wants to rise and pass through the loose blown in insulation in your attic flooring. When this rise of air occurs, the mass of air takes with it temperature and moisture in the envelope of the house and moves it to the attic. Air mass expansion in the summer months, creates a required pressure release through bents in the attic, this pressure has to be equalized so that it doesn’t push it into the living area. These vents allow for the heated air to be pushed through allowing for newer cooler air to replace it and start the process over again.
It’s always a good idea to have a look at where the money will be spent, and where it will be best spent before retrofitting your home. Make sure to contact the right insulation contractors Toronto has to offer. Up to %35 of energy is either lost or kept through the roof of the house. Crawl spaces of a home can contribute up to %30 in energy cost and the windows, doors and walls make up the rest. Stop all radiant energy fro entering the building by spraying open cell polyurethane foam under the or against the roof deck. In the hot and humid summer months, humidity is kept from entering the house. Without radiant energy, there is no expanding air mass. Without expanding air mass, vents aren’t needed and by not needing vents, there is a stop of temperature fluctuations in the winter months and your HVAC system doesn’t have to work overtime.
The roof should be sprayed as it is the largest contributor of energy loss in the envelope of the whole house, followed by the crawl space. Trying to re-insulate walls is a bit tricky and has little payback. Always contact the most reliable spray foam company when you are heating or cool in the air inside of your home, it’s because you retrying to create a different climate inside your home compared to what’s going on outside. When you install open cel polyurethane foam, it eases the burden on you HVAC system which saves you money in the end. You re-coup the initial investment after 3-7 years of energy savings.