However if the plaster is pulling away from the lath you first need to shore up the wall with a two step process.
How to fix cracks in bathroom wall.
Scrape away any loose compound and use a razor knife or drywall saw to expand the crack through the wall surface into the stud cavity image 3.
Avoid removing solid well adhered compound beyond the crack itself.
Start by cutting a v shaped notch about 1 4 to 1 8 inch 0 64 to 0 32 cm along the crack to help hold the compound in place.
This gives the spackling or joint compound a larger surface to adhere to.
It works best on hairline cracks but it s worth a try on wider cracks too.
To fix the crack you have a couple of options.
Fill the crack with new drywall compound and apply a thin coat of compound to the wall surface where the old tape was removed.
It forms an elastic film that stretches and contracts along with the crack.
Step 5 apply two more coats of joint compound allowing it to dry completely in between coats.
Once you have widened the crack clean the dust and other debris out of the crack using a paintbrush or vacuum.
Then spray on two to three light coats of good bye cracks.
Use a putty knife to apply at least 3 coats of joint compound.
You can replace the entire tile.
Use a mild detergent and wipe down the walls ceiling.
Embed fiberglass mesh drywall tape in the wet compound scrape off the excess and allow it to dry for at least eight hours.
This involves scraping away the loose tape and crumbled bits of drywall mud sanding the surface smooth.
Start by cleaning loose material out of the crack and fill it with joint compound.
How to paint over cracked paint in the bathroom.
The first step to repair cracks in walls made of drywall is to use a utility knife to widen the crack slightly.
You can repair the crack with tile filler and then paint over the filler with a color that matches the rest of the tile.
Prepare the room by cleaning off the countertop removing the shower curtain and taking towel bars and switch plate covers off the wall.
Repairing cracks in walls the best way to repair a crack in drywall is to re tape the joint.
Clean all the surfaces to be painted.
Let each coat dry fully before you add another on top of it.
The best way to fix the crack is to patch it with joint compound.