The Calder Geotec 220PY Lead Underlay is a high-performance roofing underlay designed for use beneath lead sheet installations. Measuring 50m x 1m, this geotextile membrane provides an effective barrier that reduces abrasion between lead and substrate, enhancing longevity and overall roof integrity. Manufactured from durable polyester, it offers excellent resistance to moisture and weathering, making it suitable for both new builds and refurbishment projects. The Calder Geotec 220PY Lead Underlay is easy to handle and install, ensuring a reliable solution for professional roofing applications where quality and durability are essential.