I know that there are screws that are used to raise and lower/level a
threshold under my steel entry door. I don't know, though, how to get the
correct movement up or down. I do not notice any perceptible difference in
the height of the threshold when I turn these screws either to the left or
right. What am I doing wrong?
Think about it--If you tighten the screws they will pull the threshold
down; if you loosen them they will raise the threshold up.
The problem is that grit and grime get between the fixed and movable
parts of the threshold and bind them up. The down feature works fine
but when you loosen the screws, the threshold won't come up. Try
slipping a thin blade like a putty knife under the movable part of the
threshold and prying it up gently as you loosen the screws. If the
insert is wood, be careful not to gouge it up or you will create a
whole new set of problems. If it's really gunked up you may need to
remove it completely and brush or vacuum the gunk out of the fixed
Take your time and you can do it; it ain't rocket science.
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