Successful geotextile installation begins with proper site preparation. The subgrade should be smooth, free of sharp debris, and adequately compacted before unrolling the geotextile roll. Roots, rocks, or other protrusions can compromise puncture resistance and lead to failures during backfilling .

When placing the fabric, avoid stretching or tensioning. The geotextile should be laid loosely to conform to ground irregularities and accommodate settlement. Overlap requirements vary based on subgrade conditions and project specifications. For soft soils where significant settlement is anticipated, overlaps of 24-36 inches are recommended per AASHTO M288 guidelines. On firm subgrades, minimum overlaps of 12-18 inches may suffice, provided the fabric is adequately anchored.

Backfilling represents a critical phase where damage commonly occurs. Aggregate should be placed using an end-dumping method, pushing material forward over previously placed fill rather than driving directly on exposed geotextile. Drop heights should be limited to minimize impact damage. If the geotextile will remain exposed for extended periods before covering, verify its UV resistance rating (e.g., ASTM D4355) to ensure adequate protection during the installation window . At www.hzgeotextile.com, we provide detailed installation guidelines and technical support to ensure your project's success.