The Official Online Weekly Newspaper of NAHB
While an aluminum threshold with a vinyl seal will cut down on the air leaking under a front door, it also will certainly look out of place.
As shown in the accompanying drawing, here's a technique that retains the wood thresholds in old houses while still cutting down on air leaks:
First, trim the bottom of the door to leave a 3/8-inch gap between the door and the threshold.
Next, cut a half-inch by half-inch groove in the bottom of the door.
Then, secure a strip of EPDM rubber roof membrane in the groove. The strip is held in place by 2-inch screws run through a length of 12-gauge Romex wire. With the screws about four inches apart, the Romex acts as a clamp, spreading out the holding power of the screws.
Finally, trim the two protruding rubber strips so that they are each a half-inch long. They make an effective, inconspicuous — and easily replaceable — seal for the door that keeps in character with the house.
— Don Mathis; Macomb, Ill.
Tips & Techniques provided by Fine Homebuilding.
©2010 The Taunton Press
To contact Fine Homebuilding, email Christina Glennon.
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