Work commenced with the removal of the stone from the old substrate (around 200 m2) and then a new screed was installed using TOPCEM PRONTO, ready-mixed mortar for normal-setting and quick-drying screeds, in combination with bonding slurry made from TOPCEM, normal-setting, quick-drying hydraulic binder, PLANICRETE, a special type of latex for cementitious mixes, and water.
Once this phase had been completed, a layer of MAPELASTIC, two-component cementitious mortar, was applied over the entire surface. MAPELASTIC is applied with a spreader or by spray on clean surfaces dampened, where necessary, with water. When hardened it forms a highly flexible, protective waterproof coating.
Once the MAPELASTIC was fully cured, a layer of PLANITOP FAST 330 fibre-reinforced, rapid-setting cementitious levelling mortar was applied and then MAPENET 150, alkali-resistant, glass fibre mesh, which is used to reinforce protective waterproof layers and anti-fracture membranes, was pressed down lightly into the mortar. This intervention will guarantee that, over the years, any water will drain off quickly without harming the structure or staining the stone.
To bond the slabs of stone, it was recommended to use ELASTORAPID two-component, non-slip adhesive, particularly recommended for bonding ceramic tiles and large stone slabs rapidly on external surfaces.
The grout lines were filled with KERACOLOR FL-S quick-drying mortar for grout lines from 2 to 20 mm wide, which guarantees a high level of protection against dirt and, thanks to DropEffect technology, it also shows a water absorbency close to zero.