From next year, Cavity Trays is to manufacture the Type K circular Cavitray to provide damp protection for cavity wall openings up to 3m in diameter.
The Type K tray envelops the window frame, achieving 360-degree protection. It fits over the outside edge of the frame so there is no direct contact with the damp masonry, while
the main body of the tray fits within the cavity, ensuring separation between inner and outer skin.
When insulation is also required, this is provided by a thermal collar that “rings” the opening. Any water that penetrates masonry above and around a circular or elliptical opening eventually gravitates and discharges at the bottom of the opening, having tracked around the protected frame.
Type K circular Cavitrays for popular sizes are usually available from stock, while sizes up to 3m diameter are manufactured to order.