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Hollow blocks require a differentiated assessment and a targeted waterproofing method.
The air cavities contribute to the thermal insulation of the hollow block. At the same time, the large cavities and capillary-active webs make uniform distribution of conventional injection materials in the masonry more difficult.
Even after the joints have been treated, moisture can continue to travel through untreated areas, particularly the capillary-active webs.
Wall construction, moisture exposure and accessibility of the hollow chambers must therefore be assessed together. Targeted treatment of the moisture-affected outer chambers with wetBLOC Spezial stops capillary moisture transport in the treated area while the inner air chambers retain their thermal insulation function.
Targeted treatment of cavities
Targeted application
wetBLOC Spezial is injected precisely into the outer cavities on the wall side exposed to moisture. The inner cavities remain intact and continue to provide thermal insulation.
Stop moisture transport
The polymer components of wetBLOC Spezial spread through the filling material's pore and capillary system and swell as they absorb water. This stops capillary moisture transport in the treated area.
Preserve air chambers
The inner cavities remain unfilled and retain their thermal insulation function. Targeted filling of the outer cavities with wetBLOC Spezial stops capillary moisture transport while preserving the insulating air chambers.
The outer chambers stop moisture transport.
The inner ones retain their thermal insulation.
wetBLOC Spezial specifically treats the outer cavities and stops capillary moisture transport there. The inner air cavities remain unfilled and retain their thermal insulation function.
From introduction to selective filling.
The original photographs document the wetBLOC Spezial material trial on hollow blocks: targeted introduction of the flowable material, filling the outer cavities and preserving the inner insulating air chambers.
wetBLOC thinks in building physics.
Specifically tailored to your masonry.
wetBLOC Spezial combines targeted moisture protection with preservation of the thermal insulation function of the inner air chambers. The outer cavities are selectively filled to stop capillary moisture transport. The inner air chambers remain unfilled. The method is individually tailored to the wall composition and existing moisture load.
Check wall construction
Block shape, cavity arrangement and layout, and the masonry's condition and moisture load form the basis for planning targeted waterproofing with wetBLOC Spezial.
Assess the moisture load
The type, cause and extent of moisture exposure are investigated. This forms the basis for determining the appropriate waterproofing method, scope of treatment and any supplementary measures.
Include junctions in planning
Wall-to-floor junctions, transitions to adjoining components and necessary supplementary waterproofing measures are considered to ensure continuous moisture protection within the overall renovation concept.