When planning to cut an opening in a wall, whether masonry or wood, establish whether it is loadbearing or non-loadbearing. For advice on this, and on supporting the upper levels of a wall or structure while cutting openings, see the information below. The techniques needed for cutting smaller openings such as a doorway or serving hatch are those shown below. If a door is to be placed in the opening, you do not need to be exacting in making good the cut edges, because the door jamb will cover them. In calculating how large to make the opening, allow for a door jamb, and get header specifications calculated by a structural engineer.
- Internal alterations may not always need a permit, but check with your local building inspector, because regulations vary. Exterior changes such as adding a new window often have to be authorized. So let us take a look at 27 good view inside wall doorway below.
1. How To Install A Cavity Unit
Use an existing stud as the hinging edge of the doorway. After cutting the opening, add blocking between the trimmer studs above it, and insert a new stud in the open edge of the doorway. Then either attach a door jamb and door or, if the gap is to be an opening with no door, apply drywall and an angle bead, then finish. For a serving hatch, cut an opening in the same way. Insert blocking across the bottom edge before drywalling and installing casing.