Plaster walls are more vulnerable to moisture than drywall and require high quality primers.
What kind of primer for plaster walls.
If mildew is a serious concern use a stain blocking primer to prevent mildew stains from bleeding through the topcoat and then use a topcoat that specifically resists mildew check the label.
It is also important to use oil based or any high quality primer to prevent all kinds of moisture on the surface.
Use a vapor barrier primer to seal the surface and minimize the passage of moisture through the walls to the outside.
Use a paint pole to extend the reach of the.
Oil based primers are the best option for old walls.
White pigmented shellac primer highest performing primer for sealing out the toughest stains and odors in one coat concrete masonry primer seals and adheres to concrete brick stucco and plaster.
They have superior stain blocking abilities and will keep any old stains from bleeding through to new paint.
You will need to go to the paint store and ask for an acrylic primer sometimes it is called acrylic undercoater but it will great for this type of wall surface.
Use trisodium phosphate tsp to clean heavily soiled walls.
Plaster walls repairs made to plaster walls whether small touch ups or major fixes require oil based stain blocking primer.
Lath and plaster walls have a slightly better insulating r value than do drywall wall systems.
You need 100 acrylic rather than.
Soundproof drywall though rivals lath and plaster walls in terms of soundproofing.
When it comes to paint old plaster walls you first need to fix all damaged areas of the walls by using a high quality patching compound recommended for use especially on plaster walls.
Latex primer can be used but alkyd primers are recommended for best results on plaster.