I am not sure about other countries, but here in the US, we have those blue tarps that come in many sizes. Alaska is full on those things. In fact, I am building a chicken coup for those chickens I have that better lay eggs. I am covering the out side with those blue tarps. The stuff lasts for years. To stretch a tarp over a non-waterproof structure, put an eye bolt mounted directly in the center on top of the structure. From this, stretch ropes out to the ground at what ever length you like. You could use four ropes, six ropes, eight ropes, etc. Then these ropes can be fastened to the ground with tent pegs.
Offered by Clipper.