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Sealing of Masonry

Post-construction damp-proof course (dpc) against capillary rising moisture and construction sealant

Components in contact with the ground are exposed to various moisture loads such as seepage water, soil moisture and groundwater. In the plinth zone, there are also loads, e.g. from splash water, ice, de-icing salt and thermal loads due to temperature changes. Masonry structures consist of a wide variety of building materials and stone formats, as well as porous concrete and tamped concrete. The purpose of repair is to protect the building component from the penetration of moisture and substances that can damage its substance, such as chlorides.

In a professionally constructed building, the penetration of moisture is prevented by appropriate sealing measures. However, temporary or permanent moisture damage occurs time and again due to construction defects, changes in the general conditions or the ageing of the building materials.

The consequences are manifold:

  • The thermal insulation value of the wall deteriorates, resulting in increased heat loss
  • Spores, algae and fungi find an ideal breeding ground on the damp wall
  • Salts that get into the building component lead to efflorescence and flaking

In the long term, this can impair the stability of a building. Effective measures against penetrating moisture are therefore necessary to protect serviceability and to preserve the building fabric.

WEBAC products for your subsequent horizontal barrier (dpc): Before the damp proof course (dpc) is installed, a comprehensive building condition analysis is necessary for a well-founded planned repair concept. Based on this analysis, conclusions can be drawn about the causes of damage and the type and requirements of the materials needed can be determined.

WEBAC offers a wide range of special products for sealing masonry:

  • PU injection foam resins: If the masonry is fissured and contains cavities, the use of fast-foaming PU injection foam resins is advisable. On contact with water, a fine-cell foam is formed which fills the free volume and displaces water from the building structure. The rapid reaction quickly forms a barrier to prevent further water ingress, particularly in the case of pressing water.
  • PU injection resins: PU injection resin is suitable for all types of masonry and concrete constructions. PU resins have a capillary-clogging, permanent sealing effect. The new generation of PU injection resins are characterized by high flexural and compressive strength. This also enables force-fit connections in concrete and masonry structures.
  • PU casting foam resin: Casting foam resin is used in cavities, in double-shell masonry, as well as in wooden constructions or wall openings. Thermal insulation and watertightness are the major advantages of this material.
  • Surface sealing: Our special bitumen-acrylate dispersion is used for the surface sealing of buildings. Reliable waterproofing is achieved from a layer thickness of just 1 mm.