Rough Openings For Doors

One of the most prominent parts of framing walls is getting
the rough openings right. Items that decree what the
height of One of the most prominent parts of framing walls is getting
the rough openings right. Items that decree what the
height of your chance will be are floor finishes and the
use of underlayment. Door widths will stay constant with the
size of a suitable door.

In new construction most doors are hung after the floors are
installed. This allows flooring contractors (tile, hardwood,
vinyl, laminate) to lay their flooring products without
making tricky cuts colse to door jambs. It also makes for a
neat and clean door installation. Exceptions to this are
carpeted floors. Doors are hung before the carpeting is
laid. When doors are hung in carpeted areas, its a good idea
to shim them up 1/2", putting a shim under each jamb leg.
This eliminates the need to cut the doors down after the
carpet is installed.

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For a 6' 8" high door (80 inches) I like to frame my rough
opening height at 82 3/4". This allows room for all the
situations mentioned above. If your header material is a
double 2x12, holding it to the top plate will give you that
height.

Rough openings for door widths are pretty much standard. The
rough chance width is 2 inches wider than the door itself.
this allows room for the door jambs which are ordinarily 3/4"
thick. This gives you almost 1/2" of play and shim
room when installing a prehung door. For a 36" door (3' 0")
the rough chance width would be 38". Here are the most
common door sizes and their rough openings.

Door Size Rough chance Size

2' 0" x 6'8" -26" x 82 3/4"

2' 2" x 6'8" -28" x 82 3/4"

2' 4" x 6'8" -30" x 82 3/4"

2' 6" x 6'8" -32" x 82 3/4"

2' 8" x 6'8" -34" x 82 3/4"

2' 10"x 6'8" -36" x 82 3/4"

3' 0" x 6'8" -38" x 82 3/4"

To form the rough chance for duplicate doors or french
doors, take the door size times 2 and add 2". The most
common sizes for surface doors are the 2'8" and the 3'0"
doors. The 2'8" is ordinarily used for the back door and the
access door from the garage. That size door for surface use
is being used less these days because of the size of
appliances and furniture. surface doors with sidelights and
sliding patio doors rough openings vary from maker to
manufacturer. These should be verified and gotten from the
supplier.

Getting the rough openings right the first time keeps the
sawzall in its carrying case and having to turn the
opening after the walls are drywalled and painted.

Mike Merisko (c) 2006

http://www.sawkerfs.com

Rough Openings For Doors

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