I just had a new door and frame installed today. It looks great, except
I am not sure if the door sill (threshold or whatever it is called) is
It is the metal part that one walks on, or over, when entering the
foyer. It is a bit flexible when one stands on it, and my old sill was
Do I need to call the guy back to put some type of support underneath
it? If I don't, could a heavy person standing on it dent it?
If you let it go, over time it will gradually bow in the middle so the
door bottom seal won't be as good as it should be.
I'd say it was a shortcut that shouldn't have been taken and so it
should be fixed.
Should be if needed--and if replaced a solid wooden threshold w/ an
aluminum one, it'll need it 'cuz they're not as thick. The ends will be
supported by the frame but the center has no support and w/ time people
_will_ walk on it and the inevitable will happen.
Not to mention that if it's flexible enough that it's noticeable, "that
just ain't right".
It seems pretty normal for them to be installed that way. I don't
like it. A shot of low expansion door and window foam inder the
sill-plate will firm it up, but it is REALLY easy to make a big mess
using that stuff. A properly milled peice of wood or some thin-set
when installing would be a lot better. If I were YOU, I'd talk to the
Mine was the same, and eventually the plastic/rubber strip which was
screwed to the top cracked - I glued that back together and added more
support under the metal part, so it shouldn't happen again.
That's probably what I would do since it appears that you have access to get
some type of filler material under the threshold. I think a small bag of
mortar mix would probably work -- they sell small, maybe 5 or 10 pound
plastic bags, of mortar mix at Home Depot etc. Or, if you see the right
type of filler material in a caulking tube, and if you have a caulking gun,
you may want to get that and just pump the stuff in under the threshold with
the caulking gun.
It depends on what is under the threshold as to whether or not that
If it's just block like my garage entry was, then all you'll be able
to do is get concrete on the front lip and maybe along the ledge where
2 block meet.
Other than that, the more concrete you push in, the more will just
fall into the block cavity.
The support really should have been added before the door was
installed, but I guess you know that by now.
I'd be interested to hear what the installer tells you.
You might consider calling the manufacturer of the door first and get
their opinion. If the "flex" is going to void the warranty, you need
to know that before the installer says "Don't worry about, it'll be
One thing that the OP (Kate) may want to consider trying, if it is possible
in her situation, is the following:
Place a block of wood next to the metal threshold and tap on the wood
lightly with a hammer to see if you can cause the metal threshold to slide
out from under the door jamb/frame. If so, you will be able to slide it
out, see what is under it, and maybe add a filler piece or some filler
material while it is out, and then put it back.
I am not sure how the threshold is attached to the door jamb/frame, but I
had one that I did that to and it slid right out without any problem. Of
course, you would have to be careful when trying this to make sure that no
damage to the jamb/frame occurs while tapping on the wood to move the
Okay, that may make it easier. I read your other posts and maybe the
installer put the door in, poured the concrete underneath, and put some
screws in along one edge (maybe while the concrete was setting) so the
threshold wouldn't slide back and forth. If that's the case, you may be
able to have your friend just take out the screws, slide the threshold out,
put filler in underneath to support the threshold, and replace the
What happened is I used to have a redwood deck. I had it removed and
concrete was poured. The old door perfectly against the concrete.
I can see why there is now a gap .
I did call the co. today, and the owner was great. He will be out
Monday to fill the gap in. He said it would probably be a concrete mix,
but that he needed to look at it first. His installer put it in.
In so many cases the"installer crew" is a subcontractor, not an
employee of the window/door company. My advice is to always ask if the
installers are employees, or better yet, partners in the business.
The one company I worked for used one employee/partner as one crew
cheif, and several subcontractor crews. The employee/partner was out
of the picture most of the time, but did MUCH better work when he was
there. The second company, all crew cheifs were partners, and all
installers were employees - and the work done by those guys was
absolutely incredible. Virtually NO complaints, call-backs, or
I do not believe there is a manufactured door frame made where the
aluminum threshold, step, or whatever you want to call it is not
fastened to the wood frame in some way which would cause damage if you
tried to knock it out. DO NOT TRY IT!!!!
I've handled HUNDREDS of entry systems - NONE of which had a "loose"
step-plate, thrshold, step, or whatever you want to call it.
I would have thought the same thing, and when I have bought prehung entry
doors the aluminum threshold was attached to the frame. But, I once had a
prehung entry door installed in a basement between the basement and a back
patio area and it was installed over the existing concrete basement floor
and patio area which were all one flat surface. Later, when I was doing a
bunch of demo work of a chimney etc. that resulted in lots of bricks and
debris in the basement, I wanted an easy way to get all of the debris out
onto the patio. The threshold created a barrier that would have kept me
from being able to just slide/shovel the debris from the basement to the
patio. I wondered if the was a way to get the threshold out of the way and
I tried tapping on it and it just slid right out. I don't remember the exact
details of how it was attached, but there was no damage etc. Maybe it was
just tack-glued to the frame or maybe a staple or two -- I don't know. All
I remember is that to my surprise the threshold just slid out with a little
tapping. So, that's the only reason that I thought to suggest that as one
option for the OP. But, since the OP's threshold is screwed down along one
edge (mine wasn't), my idea wouldn't work unless at least the screws are
taken out first.
I'll have to look at the threshold on a prehung entry door the next time I
get a chance and see how the threshold is attached.
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