Answer: The Gobi Building System is made from strong corrugated polypropylene plastic with heat sealed edging to give it strength and to stop water(liquid) getting into the plastic. UV protection depends what the climate the gobi’s are being used that could reduce the life span if exposed to very strong UV light. This can be adjusted by cladding in different ways i.e wood/stone cladding, or by rendering the outside, to stop strong UV rays penetrating the plastic, giving the product a much longer life.