Wall junction of a balcony or terrace in historic buildings.

Structure type

Terrace or balcony in a historic building finished with tiles or stone elements (porphyry, limestone, granite).

Detail

Wall junction: laying of the finishing elements after waterproofing the existing screed.

Application cycle

1. Existing screed of sand and natural hydraulic lime, lime and pozzolan, cocciopesto or another hydraulic binder on the historic concrete slab of the balcony or terrace floor.
2. RALLK ElastoKalce waterproofing coat based on NHL 3.5 natural hydraulic lime, applied on the screed and turned up vertically onto the exterior plinth plaster.
3. RALLK Kerasiv Kalce adhesive for laying brick pavers or stone tiles outdoors, in small or large formats.
4. Brick pavers or stone finish covering.
5. Protective water-repellent exterior plinth plaster, at least 2 cm thick, made with RALLK Muro K Idro based on NHL 3.5 natural hydraulic lime on solid brick, mixed stone or calcarenite walls, where the plinth also needs restoring.

Additional information

1. The screed under the brick pavers or stone tiles must have suitable falls to drain rainwater away from the base of the wall. If it does not, the falls can be properly restored after the waterproofing, while laying the finish, or before the waterproofing with a thin (10 – 40 mm) RALLK Massetto Kalce BS sloped screed, depending on the levels to be restored.
2. If applying two coats of waterproofing, wait at least 24 hours between the first and second coat.
3. Lay the finish covering at least 24-48 hours after applying the waterproofing.
4. Make sure the waterproofing is turned up onto the plinth plaster to the height of the skirting, if there is one, or at least up to floor level. A 120-150 g/m² glass fiber reinforcing mesh, or a rubberized band or tape, can be embedded in the waterproofing at the upturn corner.
5. See the individual product data sheets for application methods and precautions.