Oversize is worse if the trim won't cover or there is no way to
nail the trim. 2 inches over door width is normal.

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______________________________
Keep the whole world singing . . . .
DanG (remove the sevens)




"aemeijers" wrote in message
...

"MiamiCuse" wrote in message
...
If I want to accomodate a standard 30" x 80" door prehung, what
kind of rough framing do I need to do to accomodate it?

I would assume the door is 30", the door jamb will add 3/8" on
each side to make it 30-3/4" assuming a 1/2" of play to level
and shim the door, I should frame it with a rough opening width
of 31-1/4". Height wise, the door is 80", assume again a 3/4"
jamb depth, plus another 1/2" for play, also assume a tiled
flooring with thinset and tile to be 1/2", we have a total
height of 81-3/4". So the rough opening should be 31-1/4" x
81-3/4". Am I correct?

A quick Google search would seem to indicate that will be a
little on the small side- this site recommends 32x82 3/4. (
http://ezinearticles.com/?Rough-Open...oors&id=267777 )
Most jambs are thicker than 3/8, so that explains the
difference.

I don't remember what the 'standard' sizes are off the top of my
head, but the best way to be SURE is call or visit your
supplier, and look in the catalog or at the tag on the door, and
maybe pull the tape off your belt and double check. The catalog
or tag on the casing will give the RO requirements. Some
prehungs require a higher opening to accommodate the the 'ears'
at the top of the side jambs, since the top jamb fits into a
rabbit on the sides. (This is mainly on exterior doors.)

If in doubt (like if the doors are special order), make the RO a
little oversize. It is a lot easier to add shim stock, than to
enlarge an opening.



aem sends...