Install A Pre Hung Door With Excess Floor Plate

The door should be square.

Install a pre hung door with excess floor plate. Mark the pre hung door for the opening adding an inch or two for carpet to run underneath the door. Measure the old door. Use shims on the side of the door with the hinges to remove the gaps between the trimmer stud and the door frame. Remove the interior trim and measure the width and height of the frame.

The new door should be 1 2 inch less than the height of the rough opening and 3 4 inch less in width. Using shims avoids the necessity for rebuilding the door opening to fit the pre hung door. The door is attached to the main jamb which is installed first. Join us as we discuss 3 options and you decide which one is best for you.

This project guide features instructions on how to remove the old door position and install the new door and complete the installation with the door trim. If you plan to install hardwood floors which are 3 4 inch thick you should cut down the jambs by 7 8 inch 3 4 inch for the floor plus 1 8 inch to reduce the gap under the door. Diycrew hrvdiy renovision there is more than 1 way to install a pre hung door. How to install a prehung interior door parts of a prehung.

Then cut the door along the mark image 3. A prehung door usually has a 1 1 4 inch gap at the bottom of the door. Prehung doors hang on a jamb that is split into two pieces. This provides clearance for a carpet and pad about 1 inch.

Before removing the old door have the new one on hand. The split jamb has a groove under the stop so it can slide over the edge of the main jamb. Typically both jambs are furnished with casings already attached. This gives just enough of a fudge factor to have the jamb a bit proud of the wall surface on each side and to make up for any irregularities in the trimmer studs of the walls.

These have a door jamb that s 4 9 16 in. Also measure the jamb depth. Wide and are made to fit into a 2x4 wall that s 4 1 2 in. Have another person hold the pre hung door in place while you install wooden shims where necessary.

Put painter s tape along the length of their mark image 1 and on the plate of the saw image 2. Installing a pre hung door is easier and faster than starting from scratch since most of the more labor intensive work is already done.