For this type of substrate, application of the Mapei product system began with sanding down the existing concrete substrate and then applying a coat of PRIMER 3296 diluted 1:1 with water. For the actual waterproofing layer, the product chosen was MAPELASTIC SMART two-component, high-flexibility cementitious mortar. To improve its elongation and crack-bridging properties, MAPETEX SEL
macro-holed, non-woven polypropylene fabric, specifically designed to reinforce waterproofing membranes, was embedded in the MAPELASTIC SMART layer.
Once the surfaces of the roof had been treated as above, they were painted and protected with ELASTOCOLOR WATERPROOF flexible acrylic resin-based paint in water dispersion.
Particular care was taken around the fillet joints between the steel guttering and the roof and between the dormer windows and the vents on the roof.
The best results were obtained by sanding down all the metal elements and fittings and applying a coat of EPORIP two-component, solvent-free epoxy adhesive. Then, after broadcasting the surface with QUARTZ 1.2 sand, the waterproofing cycle for the roof was applied as described above.
EXTERNAL THERMAL INSULATION
The external insulation for the walls was made up of 14 cm thick MAPETHERM EPS expanded polystyrene insulating panels and MAPETHERM AR1 GG one-component, coarse-textured cementitious mortar.
The surfaces were skimmed over with MAPETHERM AR1 GG, reinforced with MAPENET 150 alkali-resistant, glass fibre mesh embedded in the mortar.
A further skim coat was provided by applying MAPETHERM FLEX RP cement-free, fibre-reinforced, elastic, lightweight skimming paste and base coat.
To improve its resistance to the stresses caused by temperature variations and small movements, ELASTOCOLOR NET alkali-resistant, glass fibre mesh was embedded in the skim coat.
Once this cycle had been completed, the surfaces were finished off by applying a coat of ELASTOCOLOR WATERPROOF.
FOOTPATHS AND INTERNAL FLOORING
The footpaths outside the villa and the external areas of the building were waterproofed with MAPELASTIC TURBO two-component, rapid-drying, elastic cementitious mortar, reinforced with MAPENET 150 glass fibre mesh embedded in the mortar.
MAPEBAND SA alkali-resistant, self-adhesive, butyl tape with non-woven fabric backing was used to protect all the fillet joints.
The 30x60 cm ceramic floor tiles for the loggia and internal areas were installed with white KERAFLEX MAXI S1 high-performance, deformable, cementitious adhesive with extended open time and no vertical slip, excellent workability and Low Dust technology, particularly recommended for installing large-size porcelain tiles and natural stone slabs.
The joints were grouted with ULTRACOLOR PLUS high-performance, anti-efflorescence, quick-setting and drying polymer-modified mortar with water-repellent DropEffect® and mould-resistant BioBlock® technology.
And lastly, MAPESIL AC pure, mould-resistant acetic silicone sealant with BioBlock®technology was used to seal the expansion joints.