Practical guide

Winter Window Draft Checklist

A cold window is not automatically a leaking window. Work room by room and record where air actually moves.

Quick answer

Check the sash, meeting rail, lock, trim, sill, and nearby wall separately. Moving joints and fixed cracks need different repairs.

Compare glass, frame, trim, and sill. Use a tissue or lightly damp hand to locate airflow without using a flame.

Open, close, and lock the sash. Note loose contact, flattened strips, debris, or a weak latch.

Record cracked or missing material where trim meets wall and frame meets sill instead of covering every seam.

Room and window: Name the room and mark the window for later rechecking.
Sash and lock: Close and lock it; record movement or a visible gap.
Trim and sill: Check fixed joints for cracked, loose, or missing material.
Repair choice: Choose a moving-joint or fixed-joint material only after locating the gap.

Draft log: Record location, weather, and window position.
Example: North bedroom, lower sash left corner, windy evening.

Caulking and weather-stripping guide
Virginia Cooperative Extension. Distinguishing fixed gaps from moving window and door joints. Use this for general context and confirm product instructions, local conditions, and qualified help when work exceeds routine maintenance.
Why seal and insulate
ENERGY STAR. Comfort and uncontrolled air-leak context. Use this for general context and confirm product instructions, local conditions, and qualified help when work exceeds routine maintenance.

Weatherstripping vs caulk
Choose the right sealing material after confirming whether the leaking gap moves during normal operation.
Seasonal priority list
Place this draft repair beside safety, water, and heating tasks before assigning its seasonal priority.