Types of Caulk and Where to Seal Leaks

By Mother Earth News Editors
Published on July 20, 2010

Because as much as 80 percent of air leakage occurs in areas other than windows and doors, caulking is an absolute winter necessity. In addition to checking windows and doors, be sure to inspect the areas where:

  • the wooden sill of the home meets the foundation
  • dryer vents and fan covers pass through the wall
  • furnace vent stacks meet the exterior
  • any air leaks in the basement might lurk
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