Heavy-Duty Pond Underlayment, 12' x 15' The Aquascape Heavy-Duty Pond Underlayment 12' x 15' (3.7 m x 4.6 m) provides a wider piece than the standard 10-foot width, suitable for ponds with a short axis approaching 12 feet where the 10-foot width would leave a seam running down the middle of the pond floor. Spec Value Dimensions 12' x 15' (3.7 m x 4.6 m) Coverage 180 sq ft (16.7 sq m) Material Non-woven geotextile How to Use Prepare the excavation and lay the underlayment over the substrate. Conform to contours and overlap adjacent sections by 6" (15 cm). Place EPDM liner over the underlayment and fill. Trim at the edges after full conformation to the excavation profile. The non-woven geotextile conforms to irregular and oval excavation profiles without bunching or folding at the edges. For rocky or hard-packed substrates where the liner needs added protection, the heavy-duty material provides more cushioning than standard-weight underlayment. Lay with the smooth face toward the liner and the textured face toward the substrate. Ideal for wider oval and irregular pond builds where a 10-foot width is insufficient and the 12-foot dimension covers the full width of the pond floor in a single pass without a mid-pond seam.
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