Thin-coat plaster on aerated concrete blocks.

Structure type

External walls or partitions in aerated concrete blocks.

Detail

Interior or exterior thin-coat plaster.

Application cycle

1. Standard plaster, class CS II according to UNI EN 998-1, less than 10 mm thick, made with the highly workable all-purpose skim coat RALLK Rasante K, applied by hand or by plastering machine and leveled with a straightedge.
2. Skim coat over the whole wall surface with RALLK Rasante K or RALLK K OttO, with embedded 150 g/m² glass fiber mesh, laid from top to bottom with the vertical strips overlapping by at least 10 cm.
3. Finish with a finishing coat, powder mineral finish, acrylic, siloxane, lime or silicate paste finish, or lime, siloxane, acrylic or silicate paint, as set out in the specifications.

Additional information

1. Based on current site experience, a reinforced skim coat on fully cured plaster is an effective way to prevent hairline cracks in the plaster along the block outlines or the load-bearing elements, caused in the medium and long term by minor settlement, vibrations or thermal expansion.
2. See the individual product data sheets for application methods and precautions.