Rising (or “wicking”) moisture is among the most frequently encountered causes of damage in masonry walls. The results are clearly identifiable through the spalling of plaster, damaged joints and bricks, as well as through salt efflorescence and algae growth. Damage from rising moisture can be avoided by the installation of a horizontal barrier.
The most successful KÖSTER system to install a horizontal barrier in existing walls is the KÖSTER Suction Angle System with KÖSTER Crisin 76. KÖSTER Crisin 76 is a very thin fluid resin which penetrates into the smallest capillaries in the building material, stops the capillary action permanently, and creates a hydrophobizing effect within the structure.
Boreholes are drilled at regular spacing depending on the wall thickness. KÖSTER Crisin 76 is injected without pressure into the wall via the KÖSTER Suction Angle and the KÖSTER Capillary Rod, which acts as a wick. The pressureless system uses the same capillary action that causes rising damp. In this way, rising moisture is stopped with the aid of its cause. The major advantage of the KÖSTER Capillary Rod is that it does not waste material in cracks or voids. Only where the rod touches the wall of the borehole is the material released.
In some cases, such as in less moist walls, KÖSTER Mautrol Liquid Sealant can also be applied. Before application, an analysis of the moisture content and the salt content must be carried out.
After priming the surface with KÖSTER Polysil TG 500 and leveling it using KÖSTER Repair Mortar Plus, two coats of KÖSTER NB 1 Grey are applied crosswise to the negative side as a waterproofing layer.
KÖSTER Restoration Plasters are available in different varieties (grey, white, fast, and light). KÖSTER Restoration Plaster White is often used in older buildings without subsequent painting. KÖSTER Fine Plaster creates a smooth decorative surface and can be applied when desired to meet architectural goals. KÖSTER Restoration Plasters can only be painted over with breathable (open to vapor diffusion) paints such as KÖSTER Renovation Paint White.
Always adhere to the specifications in the respective Technical Guidelines.
