(206) 949-5683, Top Rated Plumber, Seattle
Results 1 to 12 of 12

Thread: Rough Opening for Door

Hybrid View

  1. #1
    DIY Senior Member nelsonba's Avatar
    Join Date
    Sep 2005
    Location
    Minnesota
    Posts
    116

    Default Rough Opening for Door

    I'm planning to use some doors for my remodel project that are not pre-hung. (They were in my storage space and match the rest of the doors in the house). What would be the proper size rough opening for the framing? I assume I need enough space for the door jambs and some room for shimming. What would be the standard door jamb thickness? How much room do I need for shimming?

    Thanks

  2. #2
    Plumber jimbo's Avatar
    Join Date
    Aug 2004
    Location
    San Diego
    Posts
    9,001

    Default

    Typically you would add 2" in width and height, but you should have the actual frame on hand, or specs for it, to be sure.

    A typical 36 X 80 door would be roughed at 38 X 82

  3. #3
    DIY scratch-pad engineer leejosepho's Avatar
    Join Date
    Nov 2006
    Location
    200 miles south of Little Rock
    Posts
    2,474

    Default

    Quote Originally Posted by nelsonba View Post
    What would be the standard door jamb thickness?
    Usually 3/4", and with the inch Jimbo mentioned allowed for them.

    Quote Originally Posted by nelsonba View Post
    How much room do I need for shimming?
    The 1" allowance all-around should be more than enough unless the "rough framing" is a bit too "rough" and way-out-of-square.

    Use tapered shims in pairs with one coming in from each side so the net result is flat unless the lumber around your opening is twisted. Also, be sure to shim directly behind the hinges, if necessary, and to screw at least the top hinge all the way into the framing to keep the door edges plumb/parallel with the jamb.

  4. #4
    In the Trades AZ Contractor's Avatar
    Join Date
    Apr 2007
    Location
    Phoenix, AZ
    Posts
    90

    Default

    Quote Originally Posted by leejosepho View Post


    The 1" allowance all-around should be more than enough unless the "rough framing" is a bit too "rough" and way-out-of-square.
    Where do you get 1"?

  5. #5
    DIY scratch-pad engineer leejosepho's Avatar
    Join Date
    Nov 2006
    Location
    200 miles south of Little Rock
    Posts
    2,474

    Default

    Quote Originally Posted by AZ Contractor View Post
    Where do you get 1"?
    Quote Originally Posted by jimbo View Post
    Typically you would add 2" in width and height ...
    A typical 36 X 80 door would be roughed at 38 X 82
    What number or numbers do you use?

  6. #6
    In the Trades AZ Contractor's Avatar
    Join Date
    Apr 2007
    Location
    Phoenix, AZ
    Posts
    90

    Default

    Jimbo is correct. 36 inch door gets a 38" RO.

    35 3/4" door
    + 3/4" jamb
    + 3/4" jamb
    +3/16" gap on strike and hinge side.
    =37 5/8"


    the 38" RO gives you 3/8" of play.

    where do you get 1"?

  7. #7
    DIY scratch-pad engineer leejosepho's Avatar
    Join Date
    Nov 2006
    Location
    200 miles south of Little Rock
    Posts
    2,474

    Default

    Quote Originally Posted by AZ Contractor View Post
    where do you get 1"?
    38" - 36" = 2" (1" all-around)

    What part are you missing?

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •