Cut a piece of backer board to install in the back of the niche.
How to build a niche in a bathroom wall.
Score the wall knock out the drywall using a carpenter s square and a level measure and mark the desired location for the wall niche.
Determine location cut out cavity.
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Then cut some pieces for the top bottom and sides.
Place the build in set into the desired position.
Finally put the cabinet into the wall level it then nail through the stiles into the studs with 2 1 2 in.
Carefully cut out the cavity using a saw or angle grinder.
Measure the height and width of the niche.
This can be either 1 2 inch like the wallboard or you can go thinner with 1 4 inch thick board for example.
The advantage of a thinner board on the back wall is that it gives you a little bit deeper of a shelf.
Larger than the cabinet back so it ll fit easily and cut out the drywall with a drywall saw.
I used these clamps to hold the pieces together while i wielded the nail gun.
Assemble the recessed bathroom shelves.
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Apply wood glue to the ends of the vertical pieces and attach the top and bottom with brad nails.
Use the spirit level to make sure your marks are straight and level.
Make an outline on the wall between two studs 1 4 in.
Be careful not to cut into the drywall on the other side of the wall.
Then using a pencil transfer the measurements of your niche onto the plaster wall.
Glue the back of the assembled frame then attach the 1 4 plywood back with brad nails.
Score the marks with a utility knife and use a hammer to knock out the drywall.
Next mark the outlines or cutlines on the wall by using a pencil.
We recommend installing the niche in the center of the two studs if necessary.