Plastic film as an underlay for the laying of pipes of radiant heating systems

摘要

A plastic film as an underlay for the laying of pipes of radiant heating systems is provided on one of its two surfaces with raised, strand-shaped coloured layers, the colour of which makes them stand out from the film. The said layers form at least two different square grids which are composed of longitudinal and transverse strips extending at right angles to one another and which in each case have squares which are of different sizes and are nested into one another. The grids facilitate handling of the plastic film, at the same time make the pipe-laying process clearly visible and make it possible to choose between one or other of the grids, on the basis of their different designs, for laying the heating pipes at desired intervals.