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Door rough opening dimensions

25K views 18 replies 15 participants last post by  knucklehead 
#1 ·
Since the 70's, I've framed (or had framed) door rough openings 2-1/2" over. But jamb stock seems to have evolved from a full 3/4" to 5/8" thick or even less nowadays. Thinking of going to only 2" over. What are your practices?
 
#5 ·
Are you saying a 2'-8" door isn't always exactly 32" wide in your area? That thought never occurred to me. I can understand with windows - they're either actual or 1/2" under callout depending on the manufacturer.
 
#6 ·
Our interior doors get framed door size plus 2 1/4. Our suppliers doors are a full 36 or 32 plus reveal and they still use 3/4 jambs so 2 inch over gets a little tight at time. For exterior doors typically they are 2 1/4 over also per the ro specs from manufacturer.
 
#8 ·
I guess I should have prefaced my question with a recent experience with some volunteer work for H4H. I was assigned to hang six doors in the three bedrooms. The casing was the tiniest stuff I've ever seen - 1-13/16" wide.
 
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