The Keystone cavity tray is a lightweight, simple-to-install and long-lasting solution to preventing dampness from preventing below the roof line.
Available in three sizes, covering all roof pitches, cavity widths and building materials.
Where the external wall changes to that of an internal partition below the roof line (i.e. gable abutments on new build or a lean-to extension on refurbishment projects) the building must be protected from water penetration. Similarly, where a flat roof is resurfaced or reconstructed with extra insulation, the roof level may be raised resulting in the skirting and damp proof course to be lifted leaving room for water and damp to seep in.