Our Diamond Flex Tiles have been installed all over the country from the coldest parts of the North Dakota to the hottest parts here in Arizona. These tiles hold up very well in all climate types and will not get brittle in extreme cold or melt in extreme heat. These tiles are made from the same material that your water pipes in your home are made of, PVC. In extreme heat, your tires will not stick to the tiles. These tiles are made to expand and contract with the outside temperature. So, in extreme heat situations, your tiles will expand a bit. In extreme cold, they will contract.