Abstract: A flexible, sheet-like solar heating cover is composed of at least one elongated, generally rectangular, plural-ply, laminated plastic cover section. Each cover section has opposite side edge margins and each such section defines between first and second plies of the cover section a pair of transverse headers at opposite ends of each section and a lateral series of longitudinal conduits extending between, and being in fluid communication with, the pair of headers. All adjacent cover sections have contiguous headers which are in fluid communication with each other so that liquid can flow from the header at one end of each cover section through the fluid conduits to the header at the other end of each cover section. Fluid connections are provided to the headers at opposite ends of the cover. A method and apparatus for making the cover are also disclosed.