Please remember to add the length required in the quantity field (for example - 20mSQ add 10 as a quantity)
This underlay offers exceptionally high performance and provides a highly protective barrier between substrate and liner. We recommend that this heavy duty underlay is used beneath all liners, not only to help protect the liners from penetration by sharp stones, roots etc, but also to reduce excessive localised stretching of the liner when ground settlement occurs over time.
