a connection means for glue or a similar material by means of which the surface covering is glue connected to surface covering recipient 7 as illustrated 11 in a version of the invention a sheet would be extruded without the caulking strips with the caulking strips co extruded integral or with facility to incorporate applied caulking strips both the planks and the caulking strips can be made with different colours imitating wood like teak mahogany pine oregon pine redwood etc for example the planks may have a colour and lustre imitating the colour and grain structure of a wooden material the caulking strips preferably are made of another colour than the planks for instance a black colour imitating the rubber material seams in seamed decks of yachts it also retains its colour far better than its 39 natural wood alternative moreover the planks may be made of a plastic or resin material such as pvc for example that may include additives for providing uv protection fire retardants and natural or synthetic fibres the planks may be formed with streaks of lines of colour included in the extrusion to further imitate the grain in wood the planks may be used as a floor surface a wall surface a boat or yacht deck floor board in boats and yachts bath and shower room floors and walls covering swimming pool surroundings curved floor planks.