BARRIER AGAINST TRANSVERSE MOISTURE PENETRATION
Without a surface barrier, moisture can also penetrate into the space above a horizontal barrier if there is damage to the vertical outer seal, or if it is missing altogether. The outside of the wall work is in constant contact with the damp ground and is thus soaked by the capillary action, which manifests itself on the inside through discolouration, crumbling plaster and a musty cellar smell. Salts that are washed out of the soil or the binders of building materials and transported to the surface are responsible for the flaking plaster. In order to prevent such moisture penetration, a damaged building component must be permanently protected against it.
Hydrophobic surface barrier
A barrier to rising damp is not enough in the case of transverse moisture penetration. BKM.MANNESMANN also offers a permanent solution for this: the surface barrier. Here, the entire wall surface in contact with the ground is blocked against the penetration of moisture. To ensure such a „hydrophobisation“ of the entire surface, holes are drilled in a checkerboard fashion and the material is inserted into the wall in this manner. This is possible in any homogeneous wall. Even in hollow bricks, as long as they have continuous mortar joints, this subsequent sealing can be realised. The surface barriers in the BKM MANNESMANN system are also characterised by their long service life, which is a great advantage over other products.
For many years now, injection via boreholes has proven its worth as a means of creating subsequent barriers against moisture in a building component. BKM.MANNESMANN specialises in the manufacture and processing of organic products that are injected in this manner and form a reliable barrier against rising damp or transverse moisture penetration in mineral wall structures. A polymer dissolved in high-purity paraffin oil creates a water-repellent layer in the pores of the building material.
The proven borehole injection method is also used to create a subsequent surface barrier. The material is injected into the component by means of low pressure injection. To this end, holes are drilled at an angle of approximately 45° and injection lances are used. Depending on the condition of the wall, the holes are drilled at intervals of 12.5 to 25 cm, staggered like a chessboard. In the part of the wall that is in contact with the ground on the outside, a barrier is then created against transverse moisture.
How it works
The material distributes the stone to the finest cracks and pores. After injection into the affected wall work, it gradually evaporates completely. At the end of the reaction time of approx. 3 weeks, there is only a permanent water-repellent polymer film on the pore walls of the wall work, comparable to a varnish. The material is not water soluble and spreads even in completely water saturated wall work. Due to its nature and properties, it does not mix with the pore water present in the pores of the wall. Due to the lower surface tension in relation to the water present, the excess water is expelled from the capillaries by the capillary pressure that is created. Certification by independent material testing laboratories is an important part of quality management at BKM and is carried out and renewed at regular intervals.
BKM injection products are manufactured under the strictest quality conditions and are constantly tested for consistent quality and product excellence. To this end, BKM MANNESMANN AG has defined its own product standards that are valid throughout Europe and guarantees their conformity with the name BKM MANNESMANN. This means that every customer can be sure that he always receives and uses only the best quality. Certification by independent material testing laboratories is an important part of quality management at BKM and is carried out and renewed at regular intervals.