Execution of waterproofing in highly stressed areas with additional chemical loads

Floors in industrial kitchens, laboratories and the food industry are subject to particularly high stresses. In addition to frequent or constant exposure to moisture and regular to daily cleaning with high-pressure cleaners, the surfaces are often exposed to substances that trigger chemical reactions. In particular, the joints between tiles must withstand exposure to aggressive cleaning agents or for ex. fatty acids in kitchens. In addition to the functionality of the waterproofing, the bonding and the grouting of the ceramic covering, the reliable integration of all installation parts, such as stainless steel drain channels, floor run-offs, pipe penetrations, and the execution of the connection and movement joints are decisive for the efficiency of the whole system.

Waterproofing

Simple & safe to the goal

Substrate preparation

If necessary, old screeds can be levelled with the quick-setting screed mortar weber.plan 816.
Installation of floor run-off

The stainless steel floor run-off is inserted into the recess provided and fixed with weber.plan 816.
Preliminary works

1. The entire surface, including the area along the drain channel, is primed with the solvent-free EP resin primer weber.prim 807.
2. All penetrations, connection and movement joints, including those in the wall/floor area, are waterproofed, by using the system-compliant perforated sealing tape weber.tec 828 DB G or 150.
3. The liquid-tight and chemical-resistant waterproofing is carried out in 2 layers with the flexible waterproofing EP resin weber.tec 827. If the tile covering is subsequently mineral-bonded, the 2nd layer must be sprinkled with the silica sand weber.sys Hartquartzmaterial (grain size 0.7 - 1.2 mm) while it is still fresh.
4. The stainless steel drain channel is grouted down to floor level without voids, by using the grouting mortar (4 mm) weber.rep 768. After the grout has dried, the waterproofing with weber.tec 827 is extended up to the channel.
Tile fixing

The tiles must be laid in the adhesive bed within the open time. It is recommended to use the EP resin-bonded adhesive weber.xerm 847. Bonding with the quick-setting and flexible flow-grade tile adhesive weber.xerm 860 F is also possible, depending on the specific stress.
Grouting

1. After drying of the tile adhesive, the joints between tiles can be grouted with the 2-comp. EP resin adhesive weber.xerm 848.
2. Connection and movement joints must be closed with the elastic silicone joint sealant weber.fug 880. For better bonding, use the primer weber.fug 884 (absorbent joint sides) or weber.fug 885 (non-absorbent joint sides).