Plastics might warp in the sun and peel at the edges due to expansion if it’s not secured properly. My plastic garage flooring does anyway. Something to consider.Do you think something like this would work?
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8ft x 4ft x 3mm Black Polypropylene - Available To Buy Online Here
Black (Embossed) Polypropylene Sheet Options at Vision Plasticsvisionplastics.co.uk