It s basically extra thick paintable wallpaper that acts as a big patch over the whole wall.
How to fix bad bathroom walls.
Grab a bucket of ready made drywall mud and apply it evenly over the surface of the wall with a 6 inch 15 cm putty knife.
Clear out or cut drip grooves below windowsills.
Push firmly along areas where there are no studs and just the construction adhesive.
Some have a textured or patterned surface.
Some walls are so bad that the best fix is to tear them out and install new drywall.
Seal the gaps around window and door frames.
Drywall mud is fairly easy to work with and you can give the mud an interesting texture after putting it up to hide any imperfections in your wall.
Wall liner is the next best fix.
Keep external walls including the pointing and the paintwork in good condition.
Some versions are smooth.
But if the paint still does not help try these tricks for covering up damaged walls.
Attach the panels to the walls where studs are located using finish nails and a hammer or a nail gun.
If a water leak is the cause repair the leak before covering stains.
Apply construction adhesive to the back of the panels.
To smooth the walls completely wipe off any remaining texture and dust with a sponge fill in small dents or holes with joint compound and sand rough spots with a sanding screen.
Using a circular saw cut the luan panels down to the length of your walls.