How to Check for Energy Loss in Entry Doors

Some of the most obvious signs that a door needs to be replaced are visual. Some of these signs include the age of the door, peeling paint or cracks in the door, and even damage to the wood and stain from the sun. Other times you can feel a draft through the door on a windy day.

Unfortunately it isn’t always just that easy to tell when you door needs to be replaced.  By having gaps between the threshold and door, you could be losing as much heat as having a 3″ square hole in your wall! Here are a couple of tests that you can try on your entry door to check for energy efficiency issues, the dollar bill test and the flashlight test.

Dollar Bill Test:

Open your entry door and place a dollar bill on top of the threshold (bottom of the door frame) and close the door. Next, try to move the dollar bill to one side of the door and over to the next. Does it move, or is it a struggle? If it can move, that is a place where air can move freely in and out of your home.

Flashlight Test:

Have two people stand on either side of the closed door. One person will shine a flashlight around the perimeter of the door. The light will shine through any cracks or gaps in the seal. Can the second person see any? If so, it’s time to replace your door to increase the energy efficiency in your home.

These tips are just some of the interesting facts that you can learn from our owners, Tod and Todd during their videos, Home Improvement Tips with Tod and Todd. Although our series is done for 2011, you can still view all of the videos on our website by going to