• Suitable for use in both new build and refurbishment, they are an easy way to achieve building regulations compliance when closing cavities with unknown widths. • To be installed at the reveals of door and window openings. • Suitable for new-build or refurbishment projects. • Suitable for use in a variety of wall constructions. • To fit cavity widths: 50-100mm • Simple to install, with cut-to-size grooves • Multi-width design overcomes cavity width variations • Manufactured in accordance with BS EN 13163: 2012 +A1: 2015. • Satisfies all NHBC standards. • Compliant with all relevant British Standards.