The title of today's post sounds a little like a mystery
novel. There is a door that often gets overlooked when
weather-proofing because the doors leading directly outside are what
first come to mind when checking for gaps and air leaks.
The forgotten door is the one between the house and the
garage. This is especially important when the garage is not insulated.
Besides replacing the weather stripping around the door frame, installing a
door sweep helps seal the gap between the bottom of the door and the threshold
to prevent cold air from entering and warm air from escaping, or the reverse in summer months.
So there is no mystery here, just remember when checking for
unwanted airflow between your house and outside, don't forget the door to the
garage.
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