Tile-over-tile installation on a historic screed.

Structure type

Screed with existing ceramic, terracotta or stone tiles in good condition that are not to be removed.

Detail

Installation of the new ceramic or stone flooring over the existing flooring with natural hydraulic lime NHL 3.5 adhesive.

Application cycle

1. Lime and sand and/or cocciopesto screed, bonded or floating.
2. Existing terracotta, ceramic or stone tiles, well bonded to the screed, that are not to be removed.
3. Bonding skim coat with RALLK Kerasiv Kalce, based on NHL 3.5 natural hydraulic lime, at least 24 hours after spraying or brushing RALLK Primer K acrylic bonding primer onto the existing tiles.
4. RALLK Kerasiv Kalce adhesive based on NHL 3.5 natural hydraulic lime for laying terracotta, ceramic or stone tiles indoors or outdoors, in small or large formats.
5. New terracotta, ceramic or stone finish covering.

Additional information

1. On smooth or glazed existing tiles, roughen the surface with abrasive brushes and remove all dust before continuing with the system shown.
2. The new ceramic or stone covering must be kept away from the perimeter walls so that it does not butt against the plaster.
3. Wait 24 to 48 hours before walking on the floor.
4. See the individual product data sheets for application methods and precautions.