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![](https://pinterest.com/pin/create/button/?url=https%3A%2F%2Fwww.homemadetools.net%2Fforum%2Fshowthread.php%3Fp%3D72096%23post72096&media=https%3A%2F%2Fs3.amazonaws.com%2Fhmt-newsletter%2Fhmt_avatar_200.jpg&description=Automatic Door Sweep by lazarus - A rolling sweep inside the door will stop air flow. I suggest a 1.25" roller the length of the door with a loosely pinned plate at the hinge end and a radius slot at the open end. This will swing the roller to the door when the gap opens/closes. Your threshold will need to be straightened if you want to keep water out. I've never worked for NASA, but this might be rocket science. Good luck.
Ben
On second thought, you might have to taper the roller t "Pin It")
A rolling sweep inside the door will stop air flow. I suggest a 1.25" roller the length of the door with a loosely pinned plate at the hinge end and a radius slot at the open end. This will swing the roller to the door when the gap opens/closes. Your threshold will need to be straightened if you want to keep water out. I've never worked for NASA, but this might be rocket science. Good luck.
Ben
On second thought, you might have to taper the roller to keep it from binding as the open end swings in. Yup, it is rocket science.
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