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My problem is that my door has a wide crack under it. It lets in insects and lets out the air or heat. I know you can use a foam seal but need something to go all around the door. I haven't tried any thing yet because I dont know what to start. Can anyone provide a suggestion for the method I should use?

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You need to add a threshold to the door to seal under it. There a number of thresholds where you can then adjust the height to meet the bottom of the door. Around the other 3 sides you need to add weather stripping.

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if you are not allowed to add anything to the door you can buy a long round cushion that you put in front of the door (or train your dog to do that :) )

If you are allowed to add something to the door you can install a sweep:

as found on google

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  • That doesn't look like it would block air movement like a compressible gasket would. – iLikeDirt Oct 1 '14 at 19:34
  • A brush-style sweep does help reduce airflow, though it isn't a gasketed seal. There are variants which have multiple plastic ridges or other protrusions that attempt to achieve a better seal; I'm not sure whether they actually work significantly better. – keshlam Oct 1 '14 at 20:33

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