This Old House general contractor Tom Silva enhances the energy efficiency of an old, drafty door. (See below for a shopping list and tools.)

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Weatherstripping, or attaching seals around an entryway door to fill in the gaps, is essential to maintaining the energy efficiency of your home in the winter (keeping the chilly air out) and in the summer (keeping the air conditioning in). Consider that even a tiny 1/8-inch gap around a typical entryway door is equivalent to having a 5 ½-inch-diameter hole on an outside wall. Closing that gap can go a long way in lowering your energy bill.

Shopping List for How to Weatherstrip a Wood Door:
- Mechanical weather stripping, for sealing door in opening
- Flexible, push-in weather stripping, for sealing head and side jambs
- Tung oil, used to seal routed groove

Tools for How to Weatherstrip a Wood Door:
- Hammer, used to remove and replace the hinge pins
- Router and straight bit, for cutting a groove into the bottom end of the door
- 3-inch paintbrush, used to apply tung oil

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How to Weatherstrip a Wood Door | This Old House
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