Instructions / Assembly

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Oak Adjustable or a 1-1/4” Solid oak sill. Both
provide adequate clearance for most floors,
such as carpet, wood and tile. In case you need
an even height clearance, the rough opening
must be adjusted.
Prior to installation check the rough opening to
ensure that:
 The opening provides enough space a
properly shimmed.
 The opening is not twisted. Minor twist can
be corrected with shims. If the opening is
badly twisted [not plum], you will have to fix
the condition before proceeding.
3. Prehung door units are shipped out by Main
Door Corporation standing upright on a pallet,
covered with white cardboard. Prior to
installation, make sure that the unit is delivered
in good condition.
4. For installation, take the door (s) off the hinges
by removing the hinge pins. Once the doors are
removed, take the unit off the pallet and
remove all package parts from the frame.
5. Prepare threshold area of the door unit by
putting two generous lines of caulking about ½”
in distance to each other along the outer edge
of the floor. It is important to make sure that the
caulking beads will seal the floor and the
threshold against moisture entering from the
outside.
6. Proceed with installation by carefully tilting the
door into the door opening. Make sure that the
previously applied caulking has contact with the
threshold and that the hinge jamb leg is level.
7. Replace one screw from the top and bottom
hinge plate by a #8 x 3” screw to temporarily
fasten the jamb loosely into the stud. Or, remove
the hinge plate and place screw behind the
hinge plate to temporarily fasten the jamb
loosely into the stud.
8. Once the jamb is only fastened loosely, you can
now begin to shim the hinge jamb from the
inside behind the hinge location. Be sure that
the hinge jamb leg is level in both directions and
the entryway opening is square.
9. Once the hinge jamb leg is fixed in a level and
square position, start leveling and shimming the