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Winter Energy Saving Tips #2: Finding/Sealing Basement Air Leaks
Air Leaks in Your Basement? How to Find and Seal Them  
Many overlook their basement as a source of heat loss.  Cold air enters your basement just as it does the rest of the house through air leaks that are both above and below ground.  Air filtering into your home can be sucked into your furnace causing it to work harder and longer.  

Plug large gaps in basement walls
Polyurethane foam in a can is ideal for plugging openings 1/4-inch to 2 inches wide, check  for them around pipes and vents that pass through basement walls to the outside. A standard 12-ounce can sprayed in place will slowly expand to about twice its size, making it a good choice for large cracks. After it dries, cut off excess foam with a utility knife or putty knife.

Plug small gaps in basement walls
Caulk is generally best for the smaller gaps, such as those cut around electrical boxes. Silicone costs the most and works well when sealing nonporous materials, such as metal flashing.  Acrylic is less messy to work with and cleans up with water.  Use high-temperature caulk around vent pipes that get hot, such as those for the furnace ... more

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