Inspect and Caulk Around Windows

On a cold or windy day, hold a lit candle or incense stick near window frames and sills. A flickering flame means drafts are present. Check interior caulk where the window frame meets the wall — cracks indicate gaps. Apply paintable latex caulk to fill gaps. For weatherstripping on operable windows, replace any compressed or torn foam tape. Air infiltration through windows and doors typically accounts for 25–40% of home heating and cooling energy loss.