A lot of energy, and as result money, is wasted through home air leaks. A recent study put this figure at around $350 money you can definitely use to pay the plumber, perhaps plumbers in Toronto, to plug them and still remain with a lot of change. The most notorious place for these leakages is in the attic and one should definitely start there when looking to save themselves these unnecessary costs.
The research also pinpointed that the home air leaks occurred mainly due to the fact that recessed lights were not insulated. These lights have vent openings the lead directly to the attic, paving the escape route for air. When buying bulbs one should look out for the ICAT sign (insulation contact and air tight) which have already been sealed. The already existing openings can be sealed shut using an inexpensive baffle by fixing it into the housing.
According to building standards it is required that an inch of space be left between wood framing and metal flues and two inches of space between the brick chimneys. This however then creates room for air to flow and escape. To curb this one can cover the space with an aluminium flashing mixed with silicone caulk which has been heated to high temperatures. The next area worth inspecting is the attic hatch, which is a gap that is left around attic stairs that are the pull down type. To seal it use caulk or foam or you can even purchase a pre-insulated cover kit for these types of hatches.
To get rid of the medium sized attic gaps it is recommended that one polyurethane foam mainly around the plumbing pipes and the plumbing vents. For the tiny gaps, these are smaller than 1/4 inch in width; the best filler would be caulk. Use silicone when the surrounding materials are non-porous, for instance metal flashing and even where the temperature conditions are extreme as in the attic. The other option is the latex acrylic caulk which has the advantage that it is less messy to work with.
As for the basement only gaps that are above the soil level will be responsible for letting air in. the same procedure for the attic gaps is applied here. Also, use caulk that can withstand high temperatures around plumbing vent pipes that are prone to getting hot. There are so many areas that tend to let air escape and it would be worthwhile that you get more information from experts such as the plumbers in Toronto.