installing door in hallway, dimensions

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Old 05-11-07, 06:06 PM
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installing door in hallway, dimensions

Hey guys,

I have a hallway that I need to install a door into, the hallway is 35 1/4 and I'm going to use a prehung (yep, never using anything but prehung ever again, not worth the hassle) 32" which measures 33 1/4 rough opening. Problem is, if I use 2x4s to shim out each side I no longer have enough room. Is there something else suitable I can frame it in with? I also have to have some room for trim to cover the jamb.

thx!
 
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Old 05-11-07, 07:40 PM
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A 32" door needs a rough opening of about 34". The "rough opening" is the size of the space that the door will be installed in.

So since your hallway is 35 1/4, you only have room to put 5/8" plywood on the walls. Or, you may be able to put a 1x4 on each side, but it might make the rough opening a little tight (33 3/4) since your prehung door jamb will probably measure 33 3/8" wide. If the walls are plumb, you could get away with it being that tight, but if they are out of plumb, you will need more room than that. You won't be able to use full casing around the door, since there isn't room for that either it will have to be ripped down on the left and right sides (and will probably need to be tapered too) in order to fit. This won't look the best.

One other option, if your code allows it, is to install a 30" prehung door instead, which would leave you enough room on each side for a full piece of 2 1/4" casing without ripping it to fit. A 30" door would need a rough opening that is about 32" wide, so you would be able to use a 2x4 on each side if you went with a 30" door. It sure would look better.
 
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Old 05-11-07, 08:22 PM
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I love 36" doors, but I've walked through a zillion 30" doors. Of course, wider is better, especially when we get old and are in our wheel chairs. If you've already purchased the 32", can you exchange for a 30"?
 
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Old 05-12-07, 05:08 AM
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thanks for the replies. I have not purchased a 32" door yet and 30" is probably the way to go, I was trying to avoid it as they tell me 30" door is a special order which takes 6-8 weeks to arrive. But you're right, it will be easier to install and look correct, this is what I'll do.

Regards,

David
 
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