Install the floor threshold
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Set the threshold down at the doorway.
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Slide the threshold against the door frame.
Note: Make sure that the side seals are not between the threshold and the door frame. Neatly cut the side frame seal to the correct length, if needed.Note: Make sure that the side frame seals and the threshold seal do not overlap. Neatly cut the threshold seal to the correct length, if needed.Note: Make sure that the protective plastic on the aluminum frames is not under the threshold. Peel back further, if needed.
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Install the floor threshold with 5x50 screws (2 pcs).
Note: Make sure to install the screws to the middle of the screw holes.