Pre-Hung Door Information

Hanging a door involves the process of fastening hinges to the door and to the wall the door is to swing on. In the past, doors were brought to the building site and hung directly on the building. Over the last 40 years the process has become more specialized, and mechanized.  Today, the vast majority of doors are hung in shops rather than on the job site.

When doors are hung in a shop they are called Pre-hung Door Units. The combination of economy, quality and convenience has made pre-hung door units a standard throughout the construction industry.

Our Pre-hung doors include all jambs & hinges, and exterior doors also include threshold and weatherstripping.

For prices on pre-hanging doors, click one of the links below:

Interior Doors

Exterior Doors

Hanging prices are in addition to door prices.

Left Hand

Right Hand

Handing

The first consideration when discussing a pre-hung unit is handing. "Hand" is the word used to describe the direction the door will swing when hung. If you stand facing a door on the side where the door swings towards you and the knob is in front of your right hand, this is a right hand unit, if the knob is in front of your left hand, this is a left hand unit.

Rough Opening

The term 'rough opening' is used to describe the hole in the wall necessary to provide room for a pre-hung unit. The rough opening dimensions are normally 2" taller and 2" wider than the door. For example: The rough opening for a 2'-6" x 6'-8" door would be 2'-8" x 6'-10."

Backset

An important consideration when boring a door is the backset. This is the distance from the edge of the door to the center of the knob. Because of the width of our door styles, and the thickness of our jambs, we use a 2-3/4" backset as standard but 2-3/8" is available upon request.

Jamb Width

The jamb is the part of the unit that surrounds the door and serves as the attachment point for hinges, locks and other hardware items. The major variable when considering the jamb is it's width.
The jamb width is normally determined by the thickness of the wall the unit is to install into.

For walls constructed of 2" x 4" lumber, the normal jamb width is 4-5/8", and for walls constructed of 2" x 6" lumber, the normal jamb width is 6-5/8." Jambs are available in any size from 3" to 11".

Bore Spacing

Pre-hanging normally includes having the door drilled, or bored, for hardware. An exterior door is often double bored. This means that two sets of holes are drilled, one for the knob and the other for the deadbolt. In many cases, entrance hardware is constructed as one unit, with a backplate that is made to fit a standard bore spacing.
An interior door is normally single bored, meaning that only one hole is drilled for the knob, so bore spacing is not a consideration.

It is very important that you consider the hardware that will be used on the door before specifying the number of bore holes and bore spacing.  The most common center-to-center hole spacing for double-bore door prep is 5 1/2", but some hardware requires different spacing, perhaps 3 5/8". Check the hardware requirements before specifying.