Q: My children seem to run in and out the back door 100 times a day. This creates a chilly draft each time and much dust. Does it make sense to build a vestibule around the door, and how can I build one myself?
A: Building a simple do-it-yourself exterior vestibule around your back door can help cut your utility bills, both winter and summer. If you are handy with tools, you should be able to build a very attractive and inexpensive vestibule during a weekend.
A vestibule saves even when the back door is not being opened. The dead air space provides additional insulation value to the back door and frame area. Also, most well-used exterior back doors no longer have a good airtight seal. A vestibule reduces the air leakage past your back door weatherstripping.