INSTALLATION INSTRUCTIONS FOR INTERIOR PREHUNG DOORS
Before you begin
Remove the packaging and take the following precautions with the door: 1. Prehung interior doors can be installed immediately. If you are not installing immediately, store your door flat on a level surface, in a clean, dry, well-ventilated area. 2. Avoid excessive warping or drying. Do not store or install your prehung door in a damp, or freshly dry-walled building. Keep the door at least 10 feet away from heating registers, and away from direct sunlight. 3. Handle your prehung door with clean hands or gloves, and lift rather than drag it. The precautions you take now will make finishing and installation much easier later. (Consult your retailer for information on finishing instructions.)
Cross section of a typical door installation
All parts are seen in position in this horizontal section drawing. Note that the hinge pin protrudes about 1/8" beyond the door; there are both left-hand and right-hand hinges for doors that open from either the left or the right. Doorstops fit snugly against the closed door (they are installed with the door in the closed position). The casing is set back slightly from the edge of the jamb to allow removal of the hinge pin. The leading edge of the door is beveled to give the door clearance to swing without leaving a visible gap between the closed door and the jamb on the outside. Prehung doors come hinged to their jambs.
Flat Jamb
Casing One Piece Flat Jamb Stop Door Casing Two Piece Split Jamb
Split Jamb
Door
STUD ROUGH OPENING (R.O.) ALLOWANCES
UNIT DIMENSIONS R.O. WIDTH R.O. HEIGHT
Tools Required
All you need is a hammer, Phillips screwdriver, 24" level, 24" framing square, nail set, wooden shims, 8d and 16d finish nails, putty knife and wood filler.
Step 1. Rough Opening
Before you start, check to make sure that the rough opening is 1/2" wider than the unit width & 1/2" higher than the unit height. This will allow you to shim and square the door frame easily. Door casing will cover the gap between the rough opening & the door frame.
18" - 19-1/2" x 81-1/2" 20" - 21-1/2" x 81-1/2" 24" - 25-1/2" x 81-1/2" 28" - 29-1/2" x 81-1/2" 30" - 31-1/2" x 81-1/2" 32" - 33-1/2" x 81-1/2" 36" - 37-1/2" x 81-1/2"
20" 22" 26" 30" 32" 34" 38"
82" 82" 82" 82" 82" 82" 82"
Step 2. Determine Door Swing Required
Step 3. Square and Plumb Rough Stud Opening
Step 4. Install Pre-Hung Unit Into Rough Opening
Left Hand Door
As viewed from the Interior
Right Hand Door
When the door opens to you, and the knob is on the left, it is a left hand door.
When the door opens to you, and the knob is on the right, it is a right hand door.
Make sure: 1. The threshold is level 2. The hinge side of the rough opening is plumb 3. The head is square to the hinge side of the rough opening
Center the prehung unit into the rough opening, bottom first.
Step 5. Nail Hinge Side of Frame
