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Old 02-15-2012, 07:02 AM   #1
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trimming doors down


i am going to be installing some pre hung doors and they need to be trimmed about 2 inches
can i cut the jamb and then the door, check for fit, install jamb
then take the door off the hinges and reinstall the bottom support i cut off?
thanks!

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Old 02-15-2012, 07:17 AM   #2
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trimming doors down


Why not?

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Old 02-15-2012, 02:11 PM   #3
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trimming doors down


just curious as i thought it may give some sort of support but i should be fine just to test it?
thanks
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Old 02-15-2012, 06:44 PM   #4
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Those are some low openings that you are working with!
Are you talking about interior hollow core doors?
If you have access to a table saw it would be easier to rip new pieces
to fit inside the two door skins than to try to clean up the existing piece.

I use 5 minute epoxy to glue in the bottoms so that I don't waste too
much time waiting.
Devcon High Strength 5 Minute Epoxy part #S-209 (maybe 20945). It's a
bigger container than most of the tiny ones you see and will save you a bit
of money.

RC/DG
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Old 02-15-2012, 08:10 PM   #5
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i never thought of the 5 minute epoxy that is a great idea
the rough openings are about 79 inches
yes interior hollow core doors
so should i replace the inner piece asap or can i fit the door make sure it fits then glue the piece in?
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Old 02-15-2012, 08:28 PM   #6
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I am sorry, I thought that I addressed that question but obviously not!
When I have to restick doors I do it right after I cut them off and have them laying flat on a work table
so that they don't have a chance to twist.
My concern is that without the bottom piece glued in place you might get some twist in the door when
you are lifting, hanging and taking down. I suppose that it would be ok if you pushed the door firmly back down
on a flat surface before you glue it. The less movement without 4 sides of frame glued in place the better.

Hope that helps a bit!
RC/DG
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Old 02-15-2012, 08:42 PM   #7
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that helps out a ton!!! thanks again!!
so this is how i am thinking of doing it
taking the door off the hinges, slide a 2x4 in the frame to keep it solid while i cut it to length
cut the door down approx 3/4 inch shorter than the bottom of the frame
restick the bottom, let dry
then hang the doors
that sound about right?
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Old 02-15-2012, 08:57 PM   #8
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Sounds like you have a good plan!...Probably would be helpful to have another person there
to keep jamb from flopping around while you cut the legs. I usually do it alone but it can be annoying.

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Old 02-15-2012, 09:03 PM   #9
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any other tips you can offer me?
i have taped the circular saw up
i will score along where i need to cut
i will tape the line also
i have a 40 tooth 7 1/4 inch blade
use 5 minute epoxy to restick the door
how many shims should i need a door?
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Old 02-16-2012, 05:47 AM   #10
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I think you are ready to go.
Regarding shims:
Check your RO for plumb and level.
Shim your hinge side as needed at least at the hinge locations to plumb that up and give you solid
backing for hinges and one centered between hinges.
If your floor runs downhill from the hinge side go ahead and nail hinge jamb in place with just a couple
of nails by hinges. Adjust head and latch side as required. Shim at latch, top and bottom and center of head.
Add shims and nails as necessary while keeping an eye on overall adjustment.
Probably will end up with 5 or 6 sets of nails per side.
If your floor runs up hill from hinge side shim up your hinge side to level head before your start nailing it.
Take your time and check your work as you go.
When you are happy with adjustment replace the hinge screw closest to the door stop with a longer screw
that grabs the stud. You can get longer hinge screws in various finishes in the hinge department at Home Depot.

If you have a decent reveal all the way around and you can feel pressure as you push the door into closed position it is probably because the door is hitting the door stop on the hinge side. Factory often does not
leave enough room there for clearance between door and stop. If this is the case you can probably tap
the stop over enough with hammer and thin block of wood. Renail stop as necessary.

That should get you going....Best of luck with project!
RC/DG
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Last edited by TheDoorGuy; 02-16-2012 at 05:56 AM. Reason: clarity
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Old 02-16-2012, 06:34 AM   #11
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trimming doors down


sounds good
and when i was down in menards last weekend they had some finishing screws which i picked up a jar
so alot easier for me to adjust
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Old 02-20-2012, 04:34 PM   #12
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trimming doors down


lots of places stock 78" prehung doors, no cutting involved......
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Old 02-20-2012, 09:27 PM   #13
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not for the price i got them for
7 out of 9 doors done
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Old 02-21-2012, 06:53 AM   #14
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Congrats AW......Glad it's going well!
RC/DG

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