A method of and apparatus for producing continuous surface elements, e.g. for so-called air supported shelters, according to which a tubular foil, preferably of plastic material, is wound in several layers between two drums spaced from each other by a distance substantially equaling half the width of the surface element or integral multiples thereof. Immediately prior to winding the tubular foil between the drums, adhesive is applied to the foil so that the outward side of the tubular foil on a preceding winding adheres along a greater or less path to the inward side of the tubular foil in the following winding. After winding a suitable number of loops, in conformity with the desired length of the surface element, the windings are cut mainly perpendicularly with regard to the longitudinal direction of the tubular foil, whereupon the two outer tubular foils in the stack thus obtained are pulled from each other along their whole length, and suitable braces may be introduced into each individual tubular foil section.