3. Remove snow and ice from external vents.
Why: Blocked vents can cause damage to your roof, but the real danger is to your heating and cooling systems. Extra pressure on these set-ups can lead to moisture problems-and possibly mould or rot in a home’s wooden structure.
How: Use a shovel or brush to clear accumulated snow and chip away at ice.
Time: 30 minutes to two hours.
Materials: Shovel, $20-$50.
Professional Help: $200/season and up.