Test patches are strongly recommended to ensure a good long lasting bond of plaster to masonry concrete substrates.
Plaster thickness on concrete wall.
Step 5 care of your plastered walls.
New concrete masonry walls should be properly aligned and free from any surface contamination such as mortar droppings or sand.
The thickness of the undercoat used in conjunction with thistle bond it or other bonding agents should not exceed 11mm for walls and 8mm for soffits.
Leave it rough if you prefer a textured look.
The open texture promotes a good mechanical bond between the plaster and the masonry.
After the plastered concrete walls have dried you can paint them or apply wallpaper.
If you want to apply a single coat of plaster make sure it is no thicker than 10 to 15 mm.
Remember the thickness of the top coat should be 5 to 10mm.
Open textured concrete masonry units laid with flush non tooled joints should be specified on walls intended to be plastered.
15 mm cement plaster is required on the rough side of 9 and 4 5 wall.
Recommended thickness of cement plaster recommended thickness of plastering for brick walls is 12 mm 15 mm or 20 mm.
If you want a flat wall smooth the plaster out.
12 mm thick cement plaster is done where the plain surface of brick masonry is plastered.
When relying on a bonding agent gypsum plaster should be applied to no more than a maximum thickness of 1 2inch.
The thickness of the finish coat applied over the undercoat should be 2mm.