The aim of the research was focused on the functionality of three types of waterproofing screeds from the perspective of their use in building structures. Bitumen, polymer, silicate (mineral) were studied in terms of their cohesion with the substrate and their sealing ability, used in combination with different building materials—ceramics, concrete, lime-sand bricks and marl stone, the permeability properties of which were taken into consideration, too. The cohesion was also studied after the freeze-thaw exposure to take into account the aspects of durability. During the experimental program, the basic waterproofing ability of all types of tested screeds applied on building materials was confirmed. Comparing the overall tested screeds, despite the best adhesion of the polymer-based screed, this material exhibited the lowest durability after the freeze-thaw exposure. The bitumen and silicate (mineral) screed attained similar values of adhesion to the studied base materials. However, they differ in their ability to withstand freeze-thaw cycles over time. The modified water permeability test on model masonry specimens was performed. No leakage of water during the test was monitored for the specimens with all types of applied screeds over time, and, in addition, water had not penetrated through the bricks, nor through the joints. The waterproofing effect of the screed is not affected by the joints in masonry.

The watertightness is a crucial parameter in the case of concrete structures exposed to effects of water. Number of old concrete structures suffer from the massive water ingress into the underground parts, which negatively influences the operation condition of the building and the long-term durability of used material. This contribution deals with rehabilitation of water leakage in the fortress T-St-S 73 at the Stachelberg artillery fortress, which was built in 1930s in Czech Republic, near the borders with Poland. The paper summarizes the finding of the local survey, describes the causes of long-term leakage form the exterior into the structure and used way of rehabilitation. With respect to the massive water seepage it was necessary to develop new cement-based composite, which was applied at the damaged places, to seal the problematic and weak part. The material characterization of used composite and their time-progress for rehabilitation of the historical object is documented in the paper. The whole procedure and individual steps of the remediation intervention are described.