How to Fix a Drafty Window: Step-by-Step Guide

Seal a drafty home window with weatherstripping, caulk, and window insulation film. Tools, materials, and step-by-step instructions.

Home & DIY

FigsiT Project Rating

DIY-friendly

Use a steady step stool for high windows, and open a window while caulking.

Safety gear: Step stool, Gloves (optional)

Tools Required (5)

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Materials Needed (3)

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1.
Clean the window frame thoroughly to remove any dust or debris.
2.
Apply foam weatherstripping tape around the window sash to seal gaps.
3.
Use a caulk gun to apply non-toxic indoor latex caulk to any remaining gaps around the window frame.
4.
Cut the window insulation film to fit the window dimensions.
5.
Apply the film to the window using double-sided tape, ensuring a tight seal.
6.
Use a hair dryer to shrink the film, creating an insulating barrier.
7.
Allow the film to cool and set, ensuring it remains taut and secure.