Filling Window Sill Weather Checks

A wooden window sill has deep cracks. A tool lays on the sill.
Window sill with deep cracks, called “weather checks.”

Buy and download this PDF file to view it on your computer or smart phone. It is an excerpt from the second edition of the book, Save America’s Windows with the latest updated information.
It focuses on filling weather checks in wooden windowsills. Deep cracks called “weather checks” often occur in sills on the south and west side of the building. Filling the checks makes paint more durable and extends the life of the sill.

Sketch shows a vertical window jamb, and a horizontal sill with weather checks.
Weather checks on the top surface of the sill.
  • 13 pages
  • 27 Illustrations

Topics Include:

  • Safety
  • Assessing Conditions, Determining Causes
  • Weather Check Filling Procedure, step by step
  • Detailed methods & techniques
  • Tool List
  • Materials List
  • Suppliers
  • Publications
  • Online Discussion and Help
Cleaning out the checks with a “crack tool” make this repair more durable.

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Your Rights:

Filling weather checks with an epoxy paste.

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