Lightweight render / plaster as base coat for ceramic tiles on walls

To accommodate ceramic tiles and slabs, the substrates must be prepared in such a way that the bonding can be carried out in a technically and visually flawless manner. Renders/plasters used as levelling layers must meet certain technical requirements so that they are suitable for the following tile fixing work. Weber offers render/plaster systems for new and old buildings. The lightweight underlay renders/plasters weber.dur 130, 132 and 136 are ideally suited for the fixing of ceramic tiles and slabs.

Renovation

Simple & safe to the goal

Substrate preparation

Check the absorption behaviour, pre-wet if necessary. Follow the Weber recommendations for checking the absorption behaviour.
Application

1. Non-absorbent, dense and smooth substrates like concrete and clinker require a pre-treatment with the mineral bondcoat weber.dur 101 which is combed horizontally with a notched trowel.
2. Apply beads of weber.mix 125 (profile bonding and installation mortar), install profiles without delay and position plumb. As a rule, the flush-mounted and corner profiles in damp rooms must be made of stainless steel.
3. Apply the lightweight underlay renders weber.dur 130, 132 or 136 onto the substrate in the appropriate thickness (10 - 20 mm). In the case of highly absorbent and/or differently absorbent substrates, two coats must be applied "wet-in-wet". The application thickness of the first coat should be approx. 2/3 of the total render thickness.
4. Rule level the freshly applied render flush and perpendicular with a straight edge (for ex. aluminium beam). The render surface must be level and rough for the uptake of ceramic tiles and slabs. Smooth surfaces are not convenient.
5. After the render has dried (approx. 1 day/1 mm thickness), sweep the render surface vigorously with a broom or a hand brush. Then apply the primer weber.prim 801 full-surface. Protect areas exposed to moisture with a suitable waterproofing compound.