12 Applying dB Block as an undercoat for roof and terrace waterproofing coatings ensures the absolute waterproofing of those surfaces long-term since the undercoat will not age. Even if the waterproofing coat gets damaged or fails, the substrate will not get harmed. Apply it directly over concrete, without priming, to absolutely cover hairline and micro cracks, without using any mesh tape, and at the same time ‘prevent’ any new ones from appearing. Its application will also maximize the waterproofers coverage. The product lines the entire surface(s) with a uniformed and flexible protective coat, without any seams nor joints. Surfaces that are not sound or they are brittle should be primed with the water based micromolar stabilizer AQUAFIX of DUROSTICK, prior to the application of dB Block. Already watertight roofs and terraces with well adhered asphalt roll roofing systems or existing cement roof tiles can gain new life instantly. After the meticulous cleaning of the surface and the removal of any loose sections, apply the product on the entire surface. Make sure that the product is applied to the parapet walls as well, in order to create a waterproof, ‘basin-like’ area. Due to its exceptional flexibility, dB Block will adjust over time to any substrate movement and will remain unaffected by ground vibrations and temperature variations. This will offer protection as well as extended life of the top waterproofing coating. Depending on the use of the roof or terrace(*), the top waterproofing coating product can be a flexible cementitious waterproofer, such as HYDROSTOP ROOF or HYDROSTOP 2 COMPONENT. We also suggest the use of acrylic waterproofers, such as DS-220 or polyurethane based waterproofers, such as HYDROSTOP-PU of DUROSTICK. *HYDROSTOP ROOF, HYDROSTOP 2 COMPONENT: suitable for heavy use. For space use with heavier demand, the cementitious waterproofers can be lined with tiles, natural stone slate and other lining material. DS-220, HYDROSTOP PU: suitable for foot traffic, without stic king (normal use)) By combining the use of dB Block as a system with a top waterproofing coating, one can easily, quickly and affordably achieve: • The creation of an effective protecting coat of the roof or terrace, the upmost exposed construction surface of a building to the elements (solar radiation, rain, frost, snow). • The protection against moisture and chemical pollutants of the environment from penetrating into the concrete slab of the roof, causing concrete carbonation and rebar corrosion. Those will eventually cause significant damage, that could affect the structural stability of the concrete slab and of the building as well. • The reduction of the temperature difference between the indoor and outdoor environment, thus significantly reducing vapor condensations and the development of mold and mildew (due to its energy efficient skills). • The reduction of energy consumption that is required to heat and cool the underlying interior spaces of the building. • The delay of the ageing process of the top waterproofing coating(s) and doubles their waterproofing capabilities. Waterproofing system for roofs
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