An Empty Attic Floor Is The Easiest Place To Air Seal
Heated air slips upward through gaps at ceiling light boxes, plumbing vents, wire holes and the top plates of inside walls. Under a full layer of old fill, nobody can find them. With the attic stripped by insulation removal, every one is easy to see.
We seal them with foam and caulking before the new insulation goes in. Air sealing stops moist indoor air from reaching the cold roof, which cuts down on frost, damp and ice dams. Sealing an attic floor usually takes a few hours and costs far less than the insulation that goes over it.
Baffles Keep The Soffit Vents Open
Air has to flow in at the soffits and out near the peak to keep the attic cold and dry in winter. Old insulation often gets blown into the soffit vents and blocks them. We fit baffles at the eaves so the new insulation stays back and the air path stays open. Baffles are simple channels stapled between the rafters. They cost little, but they are hard to fit once an attic is full again, which is why this is the time to do it.
Warm Attics Build Ice Along The Eaves
Ice dams form when heat from the house warms the roof and melts the snow, and the water freezes again at the eaves. Freeze-thaw winters in this part of Oxford County give them plenty of chances. Air sealing, open vents and a full R-50 to R-60 layer keep the roof cold, which is the most reliable way to stop the cycle. R-50 to R-60 is the level new Ontario homes are built to, and it works out to roughly 14 to 20 inches of blown-in insulation depending on the product.
Re-insulation alone costs about $2.00 to $4.50 per square foot in this market. Insulation removal and re-insulation together run roughly $3.50 to $7.00 per square foot. The written quote breaks out each part.
Rebates For Attic Insulation Have Conditions
Ontario's Home Renovation Savings program pays part of the cost of attic insulation when a participating contractor takes the entire attic to R-50. The program is set to end in November 2026 and could wind up earlier if the money runs out. Its paperwork does not say clearly whether taking the old layer out is an eligible cost.
We cannot promise a rebate or its amount. Check the program's own rules and its contractor list before you count on one, and ask us for the paperwork you would need.