Shop our range at Selhurst Timber of damp proof course and membranes designed to prevent moisture rising through walls and floors in building structures. These materials create protective barriers that help stop damp penetration and protect building materials from moisture damage. Used by builders during construction and renovation work, damp proof courses and membranes are essential components for maintaining dry and durable building structures. Are you spending over £150? You will receive free local delivery on qualifying orders across our delivery area.