If you live in an area with expansive clay or a high freeze-thaw cycle, you need a liner with high dimensional stability. Standard rubber liners rely on elasticity to handle ground movement, but as they stretch, they "neck" —becoming dangerously thin in areas under the most stress. This thinning eventually leads to an inevitable tear as the material reaches its limit
A reinforced RPE liner is the best choice for shifting soil because its internal grid structure resists stretching. This ensures the material maintains its original shape and thickness even under extreme structural stress. To find these high-performance materials, you'll need to skip standard backyard hobby suppliers and buy from a specialized fabricator that focuses on professional-grade liners designed to last for generations.
