Creation of a bonded and quickly ready for covering screed with slope

When constructing new buildings or renovating ones, it is sometimes necessary to apply screeds on a slope due to use or moisture stress. The use of special rapid screeds makes it possible to carry out the work without major delays. The quick-setting screed mortar weber.plan 816 shows clear advantages here due to its rapid setting behaviour: it can be covered with tiles after already 24 hours. Quick use of the floor ensures that construction progresses quickly.

Simple & safe to the goal

Substrate preparation

1. For improving the adhesion, mineral substrates must be roughened mechanically by means of a sanding technique, or by a sandblasting or shot-blasting process. After cleaning, the substrate must be pre-wetted until dull-moist.
2. For avoiding acoustic bridges and tensions, direct contact of the screed with the adjacent building parts (all walls and up stands like pillars, columns, etc.) must be prevented by installing an insulation foam strip, such as weber.floor 4960. The protruding edge strips may only be cut off after completion of the top covering.
Application

1. Mix the polymer dispersion weber.ad 785 with water in a ratio of 1 : 2 parts by volume and afterwards mix weber.plan 816 with the gauging water, until lump-free and slurry-like consistency. Apply the bonding layer onto the substrate over the whole surface, using a brush.
2. Mix weber.plan 816 in a mixing drum or forced-action mixer.
3. Pour out the mixed material "wet-in-wet"on the fresh bonding layer and spread it to the required layer thickness and slope gradient. Level with screed gauges/levelling beams or a flat trowel.
4. Smoothing works must be carried out within the pot life of approx. 30 minutes, using a wooden float or a power trowel.