According to the US Department of Energy (DOE), about one-third of the heat loss in a typical home happens through doors and windows. Doors account for approximately 11% of it. Older doors—along with those that have not been properly installed or air-sealed—are particularly vulnerable to air leakage and uncontrolled heat transfer.

Caulking and weatherstripping can prevent much of that air leakage and heat loss, and generally pays off in savings on energy bills within a year. Weatherizing your home's windows and doors will also reduce its annual CO2 emissions by between 400 and 600 pounds, according to the Rocky Mountain Institute.

How to Green Your Doors:
1. The easiest first step is to Seal air leaks
The small gaps in a door's frame or between the door and its frame causes air leaks and drafts and constributes to extra heating and cooling costs to control the temperature of that air. Sealing them can reduce that cost, keep you more comfortable indoor environment—and save CO2 emissions. Use toxic-free caulk or weatherstripping.

2.Install a storm door on your exterior doors.
Install a storm door on the outside of an exterior door. They usually come with a window and/or a screen. This can save cost of energy during the winter and during the summer it can provide a good source of screened fresh air. Storm doors are not currently rated by ENERGY STAR , but select those with with foam insulation and low-e glazing to maximize energy savings. Alternatively, you can apply a window film if you find it difficult to find a low-e selection in your area. Don't forget to ensure there's a good seal around this door, just like we suggest in #1 above.

3.If you decide you should replace a door in your home, here are some Green Criteria to consider:
a. Select doors made from sustainable materials, such as Smart Wood or FSC Certified wood, Bamboo or Ag-board (also called bio-based made from agricultural products such as straw, sunflower seed hulls and other agricultural waste products).
b.Specify a salvaged or recycled, pre-owned door.
c.Ensure your selection is toxic-free. Many wood products are notorious for formaldehyde and other toxic contents which you don't want to be breathing.
d.Check to be sure your selection is an energy-efficient one.
e.If you select the replacement option, don't forget to recycle your door!


The Department of Energy does recommend ensuring your attic and basement are adequately insulated before addressing drafty doors and windows. Thats because the most significant air leaks are usually in the attic or basement.