Dimensional stability is your liner's ability to maintain its shape. When exposed to thermal or mechanical stressors, stretchy liners can sag, develop wrinkles, pull at anchor trenches, or lose seam integrity.
Since reinforced liners like RPE are supported by a powerful internal grid, they remain dimensionally stable for the life of the liner. Their seams remain strong; they stay anchored; and they don't give your pond unsightly wrinkles.
