How to waterproof a terrace before paving?

SOLUTION: waterproofing products

1.Complete cleaning of the substrate (slab) from crumbly parts, dust, etc.

2. Creation of a new screed with the appropriate slopes.

3. After curing, apply with a spatula a first layer of about 2 mm of ELASTOPROOF 639 (così mixed: add ELASTOPROOF B639 to the liquid in a ratio of three parts A639 with one part B639, stirring accurate until a homogeneous and lump-free mixture is obtained). For a better result, it is recommended to insert a 60 g / m2 alkali-resistant fiberglass mesh in the first layer. On the first hardened layer (after 5/6 hours) apply a second layer of about 2 mm. Do not apply over technical joints.

4. After curing, at least after 5/6 days, lay the new floor (ceramic, stoneware, klinker, etc.).