The desire for optimal utilization of the land plot and securing an adequate number of parking places results in providing underground garages, with a periphery equal to the land plot, above which is the above-ground building with smaller dimensions. The difference is the size of the buildings leads to the formation of the square above the garage. Acting against the square, as the exposed part of the building, are various impacting factors such as UV rays, high and low temperatures as well as precipitation.
Besides atmospheric effects, public squares are also subject to continual loads from people and vehicles. Precipitation rainfall is a jeopardizes the functional and aesthetical aspect of a structure under a public square. To prevent water from passing through the structure into the building, the exposed parts should be waterproofed. Selecting the waterproofing requires choosing a specific waterproofing which will cope with all effects in an adequate manner. When waterproofing on squares remains as the final layer, it must be elastic, UV stable and resistant to various mechanical, chemical and thermal effects.
The DRACO GARD 500 / DRACO GARD 505 polyurethane coating meets all the sought requirements. For better adhesion of the coating, and blocking of moisture, the surface should be first treated with a primer. Selecting the DRACO PRIMO 500 / DRACO PRIMO 510 / DRACO PRIMO 850 / DRACO PRIMO 530 primer depends on the type and porosity of the surface as well as the installation temperature.
Due to large surfaces which should be waterproofed, surfaces are sawed into expansion joints which are sealed using the DRACO BAND 120 waterproofing strip, and the actual coating is further strengthened using the DRACO BAND 210 reinforced canvas. The DRACO BAND 120 strip seals the join of all horizontal and vertical surfaces as well as penetrations.
Due to the direct exposure, the polyurethane is further UV and mechanically protected using top coatings such as the DRACO TOP 500 / DRACO TOP 505 / DRACO TOP 510. The selection of the coating depends on the desired elasticity and final, matte or gloss appearance.