When I was a child, in winter, my mother always said to me: “Wear a hat! It is by the head that you lose all your heat! I hate hats, but my mother was right: it’s actually from the top that hot air escapes, not only from the body, but also from the house.
Without proper insulation, your home may lose much of its heat, 11% of which is lost through the roof. If it is flat and you can not access it from the inside, the addition of an insulation coating should be done by a contractor. On the other hand, if your attic is easy to access, you can do the work yourself.
Check your insulation
If you have access to your roof, some signs (mildew or discoloration of the current insulation coating) could confirm the existence of a problem and indicate where the hot air escapes. By checking your attic when the winter temperature is extremely cold outside, you will be able to see whether or not there is frost. If this happens, a good amount of frost will confirm a ventilation problem.
Insulation roll or mat or loose insulation?
If your attic is even and there are not too many obstructions above the joints, insulation with roll or mat insulation (or mattress) is ideal. If there are multiple obstructions, you will need to use loose insulation to finish covering the surface and fill the spaces. Remember, it is best to have a layer of insulation over joints and around obstructions. If the space is very irregular, it will be easier to use only loose insulation. No matter what you use,
Mat (or mattress) insulation has the appearance of a wadded woolen roll and is sold in 16 or 24 inch widths. After measuring the gap between your joints, cut into the roll a piece of insulation with the proper dimensions; if this is not possible (the piece can not cover everything), cut a complementary piece in another roll, or use loose insulation. Place your pieces between the joints and fill any remaining space with pieces of mat insulation.
A second layer of insulation can be installed at an angle to the first; we can also use mat insulation (or mattress). The important thing is not to interfere with the ventilation of the roof. Also, leave a minimum gap of 1.5 inches to 2 inches between the top of the insulation and the underside of the roof.
If bulk insulation can be hand-poured, it is imperative to ensure that the overall thickness is uniform throughout the attic to achieve the correct heat resistance value.
Insulating an attic is a demanding operation and an investment for your home. Whether you do it yourself or not, you can get help and even financial support through the EnerGuide for Houses program. If you are uncertain about the need for better insulation, an authorized technician can come to your home and perform a thorough and professional check. Visit the Energy Efficiency Agency website for more information.