Thin traditional plaster (less than 10 mm thick) over radiant wall heating.

Structure type

External walls, partitions or floor slabs in clay brick.

Detail

Thin traditional plaster on walls or ceilings with radiant heating.

Application cycle

1. Standard plaster, class CS I – CS III 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 or float.
2. Skim coat over the whole surface of the wall containing the radiant heating system, or extending at least 50 cm beyond the heated area, with RALLK K OttO or RALLK Raso K and 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, RALLK Marmo K powder mineral finish or another 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 caused, in the medium and long term, by minor settlement, vibrations or thermal expansion.
2. If there is insulating material between the wall and the heating elements, check its compatibility with the plaster and/or whether a preparatory bonding bridge is needed.
3. See the individual product data sheets for application methods and precautions.