01/27/2026
Attic Ventilation and Condensation: Preventing Winter Moisture Problems
When Ontario winters descend on Kingston, Belleville and Cobourg, warm air from inside your home rises and condenses on cold attic surfaces. Without proper ventilation, that moisture can linger, leading to mould, rot and costly repairs. Knowing how to balance insulation and ventilation will keep your attic dry and your roof intact. Why Winter Moisture Builds Up Condensation forms when warm, moist indoor air meets cooler surfaces like attic sheathing....
When Ontario winters descend on Kingston, Belleville and Cobourg, warm air from inside your home rises and condenses on cold attic surfaces. Without proper ventilation, that moisture can linger, l…