Plaster on rubble stone masonry.

Structure type

External walls or partitions in rubble stone (or alternatively solid brick).

Detail

Interior or exterior plaster with its skim coat and finish on rubble stone masonry.

Application cycle

1. Interior or exterior plaster.
2. Mixed stone wall (or alternatively solid brick).
3. RALLK Muro K class M5 plaster based on NHL 3.5 natural hydraulic lime, applied in one or more coats (a scratch coat followed by browning coats) until the surfaces are even, or alternatively RALLK Muro K PM class CS II plaster based on NHL 3.5 natural hydraulic lime, applied by plastering machine.
4. Reinforced skim coat with RALLK Rasante K or RALLK Rasante K nhl, based on NHL 3.5 natural hydraulic lime, and embedded glass fiber mesh of more than 150 g/m².
5. Troweled interior or exterior finish with RALLK Marmo K, applied with a steel float and polished with a flexible steel spatula until the surface is even, smooth and silky, or has another desired look (or 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. Although not mandatory when the base plaster has no cracks, a skim coat with embedded glass fiber mesh (see step 4) is strongly recommended: based on current knowledge and site practice, it is the only effective long-term way to prevent hairline cracks in the finish caused by thermal expansion and minor settlement or movement due to uneven masonry.
2. RALLK Marmo K is compatible with any acrylic, acrylic-siloxane or siloxane protective, consolidating and/or water-repellent treatment recommended for the exposure or use of the treated surfaces.
3. See the individual product data sheets for application methods and precautions.