How To Install Door Casing Trim

Door casing is the trim that you install around the outside of a door.

How to install door casing trim. Use 3d or 4d nails every 12 inches along the bottom and 6d or 8d nails along the top of the moulding piece. Cut a 45 degree angle on one end of the trim and hold it so the short end of the angle. The first step of installing door casing is to mark the cutting lines on the head trim. Most trim carpenters don t even use a tape to trim windows.

Then use a miter saw to cut the trim to those measurements factoring in a 1 8 reveal on the doorway image 2. Nail the head moulding piece to the door jamb with trim nails. The trim around a door frame also known as doorway casing is installed first and foremost to conceal unsightly construction gaps left between the frame and the drywall. It s available in a variety of styles widths and grades.

To prevent splitting during this step avoid nailing 1 4 inch from the side edges and an inch from the edge of the moulding. You can get expensive stain grade hardwood molding or affordable composite or mdf molding. Consequently you should use a spirit level over the top casing as to make sure it is aligned. Here s how they do it.

When installing window molding start at the top. Https youtu be 68cnokxcdxw click on the link. It s all done by eye with a sharp pencil a miter saw and an 18 gauge nailer. How to install chair rail.

It finishes the installation and covers any gaps or rough edges from where the drywall meets the door jamb. Casing can be molded or flat and whether the casing legs and head meet at the top of the door in miter joints or butt joints depends partly on which you choose. In addition you should place the casing at about 1 2 from the bottom of the door header. Learn how to install window and door trim and the tools and techniques you ll need.

Prepping the door for casing to sit flat and for the head joint to meet well the jamb and the face of the wall need to be in plane with each other.