Installation Guide

How to install casing

Materials needed include:

 Utility knife

 Tape measure

 Miter saw or miter box

 Level

 Flat bar

 Hammer or nail gun

 Finish nails

 Nail set

 Wood glue

 Safety glasses

 Moulding

Begin by removing the existing casing if installed.

1. Using a utility knife, cut along the joint where the edge of the casing intersects the jamb of the

opening. Repeat this process where the opposite edge of the casing and wall intersect. This will

loosen any paint or caulk and prevent damage to the sheetrock and jamb.

2. Starting at the bottom, insert your flat bar between the wall and the moulding. Gently pry the

moulding away from the wall being careful not to damage the sheetrock (Tip: use a putty knife

in between the flat bar and the wall to protect the sheetrock). Continue along the length of the

moulding pulling it away from the wall until you can remove the entire piece. Continue around

the room until all casing is removed.

3. Make a sketch of your room. Measure the length and width of each opening and record that

measurement on your sketch. Add those numbers together to determine the total lineal feet of

moulding you will need to purchase.

4. Add 10% to that total for waste and miter joints.

Choose an opening to begin installing your new casing. It is best to start with the largest opening first

and work your way to the smallest. If you cut a piece too short, it can be used on a smaller opening.

*Tip: Before beginning, cut templates for left hand and right hand miter cuts. Each opening will

have a left hand and right hand side. This will save time and reduce errors in setting your miter

angles as you begin cutting each piece of moulding.

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How to install casing Materials needed include:            Utility knife Tape measure Miter saw or miter box Level Flat bar Hammer or nail gun Finish nails Nail set Wood glue Safety glasses Moulding Begin by removing the existing casing if installed. 1. Using a utility knife, cut along the joint where the edge of the casing intersects the jamb of the opening. Repeat this process where the opposite edge of the casing and wall intersect.
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Installing your casing 5. Begin by marking the desired reveal on the door or window jamb. The reveal is the margin between the edge of the casing and the jamb. This measurement is typically 1/8 of an inch or the same as the thickness of the moulding where it meets the jamb. 6. Cut your first piece to length. Measure the side of the door jamb. Add the desired reveal distance to the height and mark your casing on the inside edge. a. Cut the top end of the moulding at a 45 degree angle.
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Casing can also be installed using corner blocks and plinths. A corner block is installed at the top of the opening. It takes the place of the miter joint where the vertical horizontal pieces of moulding intersect. A plinth block is installed at the bottom of the vertical piece next to the floor. The bottom of the casing will end on top of the plinth and the base board will butt into the side. Using blocks eliminates the need for mitered corners simplifying the installation.