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husbandry 10-08-2012 12:09 PM

Exterior double hung door - Rough Opening Measurement Help needed
Can you please tell me what the rough opening for a exterior double hung (32 in each totaling 64 inches) would have to be?

funfool 10-08-2012 01:54 PM

typically the jambs are 1 1/4", so if you add 3" to 64" you come up with a rough opening of 67".
Problem is, is this interior or exterior, jamb sizes will change.
I just tossed some numbers at you, is no way accurate without knowing if interior or exterior, also possible the door manufacturer has their own specs. Need to check with them.
If you go big on rough framing, you can always fur it in later to correct sizing.
My numbers above only allow 1/4" each side for shims.
Depends on the opening on how much room you need. You may find the floor is not level along with walls and to fit door properly need a bit more room.
Simply not enough info from your post to really give a good answer, maybe my info will help.

scottktmrider 10-08-2012 01:55 PM

Usually on a rough opening i go 2-1/2" on the weight and 3" on the height.So if you have a 32" door make it 34-1/2".Thats if iam framing it so i know its plumb level and square.
Now with double doors i would call the place you are getting the door from because there might be a divider between the doors.

woodworkbykirk 10-08-2012 02:51 PM

for larger windows and doors the correct r.o isnt always on the window schedule so we frame them in larger than required by 3" then build them into what we actually need when they arrive

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