Let’s say you want to install a bath exhaust fan in a bathroom that doesn’t have one. You’ll need to cut the wall or ceiling where the fan will go and you’ll also likely need to make holes in the wall or ceiling to run electrical wiring.
In the photo above, you can see that I made two types of openings:
- Circular opening
- Square opening
Making a Circular Opening
For the circular opening, I just used a hole saw attached to a drill. The benefit of this is it creates a clean, perfectly circular hole and you can reuse the cut drywall later to patch the hole. This type of hole can be made anywhere – it doesn’t need to be near or over a stud or joist.
Patching a Circular Opening
To patch a circular opening, I use a 1″x3″ piece of furring strip wood.
Drill a screw in the middle of the piece of furring strip and insert the wood into the hole as pictured below. Then, drill 2 screws while pulling the long center screw so that the wood doesn’t move around. Now you’ve created a backing for the drywall to be screwed in to.
Remove the center screw and screw the drywall into the wood.
Making a Square Opening
For the square opening, I like to use a reciprocating saw – specifically, the Milwaukee 12V mini cordless saw because it’s small and lightweight. Use a stud finder to find the studs or joists and draw an outline of the square you want to make such that the square (or rectangle) goes to each stud or joist. Then, try to make a clean rectangular cut so that you can reuse the drywall.
Patching a Square Opening
To patch a square opening, I use a 2×4 piece of wood to furr out the studs or joists to create a backing into which the drywall will be screwed. Pre-drive the screws into the wood a little bit and then clamp the wood to the joists to make fastening the wood piece easier.