Polyurethane flooring consists of a polyurethane core with decorative paper on the top and a transparent wear layer. Depending on the product, additional layers are added to the structure, e.g. glass fibre reinforcement or underside laminations. The material thickness is usually approx. 2.5 mm.
Resilient floor coverings are versatile, with possible applications ranging from private homes to gyms, clean rooms and industrial storage areas. They differ in just as many ways in their properties, e.g. in terms of their starting materials and possible slip resistance. Resilient floor coverings are usually laid as sheet or roll goods and firmly glued to the substrate. In contrast to other floor coverings (parquet, tiles), their appearance is not significantly influenced by the joint pattern, but is determined almost exclusively by the colour and structure (homogeneous/heterogeneous) of the surface.
The substrate must be free of coarse impurities, major unevenness or cracks. The executing company gem. VOB must also report concerns in the event of too damp ground, incorrect altitude or unsuitable temperature of the substrate, an unsuitable indoor climate or a lack of protrusion of the edge insulation strips.
If the flooring is not floating (on a surface approx. 2 mm thick, e.g. made of cork, XPS or PE foam), the substrate must be smoothed with a filler or levelling compound before laying the flooring. If more than 1 mm has to be levelled or filled over the entire surface, which is almost always the case with construction site screeds as a substrate, this is a special service for which the executing company is entitled to a separate remuneration according to VOB C DIN 18365. The service should therefore be included in the tender specifications, as far as can be identified, at the time of the invitation to tender.
Movement joints from layers below the pavement, e.g. from the screed or the shell, must be incorporated into the covering in the same width. The joint is then covered either with elastic joint sealant or a corresponding profile.
As a rule, the joints of elastic floor coverings are welded with a "cord" tailored to the floor material, which does not allow moisture to pass through into the substrate when used as intended.
For resilient floor coverings, depending on the installation location and use, there are in many cases requirements for tested and classified slip resistance.
Source: bauwion
