Most surfaces require some preparation before wall coverings will
adhere to them properly. Surface should be clean and smooth, therefore,
wash down the walls and sand out any rough spots.
Newly plastered walls should be thoroughly dry before hanging wall
coverings. If plaster is caustic, it must be neutralized by coating the
wall with two pounds of zinc-sulfide dissolved in a gallon of water.
Plaster walls that have not been aged or treated can cause the wall
covering applied over it to appear discolored or splotchy.
Latex painted, drywall or wood should be sealed with an oil-based paint
or enamel undercoat. Some latex paints will flake off and cause the wall
covering applied over it to pull loose. If wall covering is hung over
untreated drywall, it will almost impossible to remove at a later date.
It is always best to remove old wall coverings before hanging new. No
matter how tight they look, the moisture from the adhesive for the second
layer may loosen the first. If the older paper has any metallic inks on
it, these will possibly bleed through the new wallcovering.
Mildew should be removed before hanging wall coverings by washing the
wall surface with a mixture of 3/4 gallon warm water, 2/3 cup tri-sodium
phosphate, 1/2 cup detergent and 1/2 gallon of bleach. Be sure to add a
tablespoon of Lysol or Borax to the new adhesive.
Gloss enamel surfaces should be sanded with coarse sandpaper or washed
with an extra strong solution of tri-sodium phosphate soap, then
thoroughly rinsed.
Be sure to wash off paste from woodwork before it dries and leaves a
residue.