Window Weatherstripping
Weatherstripping is the material around moving portions of a window that creates a seal when the window is closed. It helps reduce unwanted air and water infiltration while still allowing the sash to operate.
Common Types
Pile Weatherstripping: A soft, brush-like material often used where a sash slides.
Bulb or Compression Seal: Compresses as the window closes to create a seal.
Foam Weatherstripping: Used in certain locations depending on the window design.
Signs of Worn Weatherstripping
Drafts or noticeable air movement.
Flattened, torn or missing seals.
Visible gaps or daylight.
Increased dirt or noise around the sash.
Water or air infiltration around moving components.
Drafts are not always caused by weatherstripping. Sash alignment, locks, balances, installation and frame condition should also be considered.
Can It Be Replaced?
Often. Many profiles are manufacturer-specific, and matching weatherstripping for older windows can sometimes be difficult to find.
Related Window Terms
Window Sash • Sash Lock • Window Frame • Weep Holes • Window Balance