Attic Air Sealing In Caledon, Ontario

Where Attic Air Sealing Is Done

The biggest leaks get the most attention. Recessed lights are boxed with covers, plumbing stacks receive rubber collars, wire holes are foamed and each interior wall plate gets a bead of caulk.

The hatch is weatherstripped and fitted with a rigid, insulated lid. Chimney chases are closed with sheet metal and high-temperature sealant, never with foam.

Attic Air Sealing Stops Frost And Drips

In a long stretch of hard cold, damp air that leaks into the attic freezes onto roofing nails and sheathing. A mild spell melts it, and the water drips onto the drywall below. Closing the ceiling keeps that moisture out of the attic in the first place.

It helps with roof ice as well. Less heat in the attic means less snow melting on the roof, which is central to ice dam prevention.

Attic Air Sealing In Older Caledon Houses

Older homes lose far more air through the attic than newer ones, since balloon-framed walls, cracked plaster and old chimneys all add openings. Sealing them takes longer. The added steps are described on the century home attic insulation page.

Attic Air Sealing Price Range

As a stand-alone job, attic air sealing generally falls between $0.60 and $1.40 for each square foot of attic, or about $600 to $1,600 on an average house, and it is listed separately on the estimate.