Apply the soundproofing strip along the bottom of the perimeter walls and around any elements passing through the screed. Seal overlaps between the sheets with the soundproofing tape and press down firmly with a rigid roller.
Position a series of levelling guides, spread the mix, carefully compact the mix and float-finish the surface. The thickness over the heating elements must be at least 3 cm. Insert metal reinforcing mesh at the mid-point or add MAPEFIBRE ST30 structural fibres to the mix.
Apply the adhesive using the double-buttering method with a notched trowel suitable for the type and format of the tiles so that the back of the tiles is sufficiently wetted with adhesive.