Sikaboom Mike and Mike Jr

Reducing Drafts

By Mike Holmes

Mike’s Advice / Exterior Renovation & Landscape Construction

Wednesday, April 18th, 2018 @ 2:30pm

The average home loses about 30 percent of its heat due to drafts. Drafts can usually be felt around windows, doors and fireplaces, or sometimes homeowners feel cold spots along a wall.

Top areas susceptible to drafts:

Windows & doors

Replace the caulking around windows and doors – also around wall openings for plumbing and venting, like the dryer vent. This should be done every year. The best outdoor caulking is rubberized, because it lasts longer. It’s also flexible, so it moves with the natural expansion and contraction of the house.

The seal and weatherstripping on doors and windows should also be replaced. This helps stop cold drafts from coming in. Any wide cracks and gaps over a half-inch should also be filled with expanding spray foam. For around windows, there are special low expanding foams that fill gaps without putting too much pressure on the window frame.

Recessed lights or pot lights

When they’re installed on the top floor of a home holes will need to be cut into the ceiling, which means creating a penetration into the attic space. A home’s attic is a cold zone – the temperature in the attic should be the same as the air outside. If there isn’t enough insulation around the pot light heat will escape into the attic.

It’s important tomake sure there is vapour barrier in the attic, properly tuck taped to seal around the pot light to the original vapour barrier that was cut. And they must be the right kind of pot light for an insulated space-IC lights.

Electrical boxes

There should also be insulation around electrical boxes located on walls that are part of the home’s building envelope. There are cases where builders don’t insulate these spots at all, allowing heat to escape.

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