Type GBOT Cavity Trays - Cavity TraysType GBOT Cavity Trays - Cavity Trays


  • Cavity Sizes accomodated 50mm – 160mm.
  • Lengths and dimensions varied to suit.
  • Material Polypropylene and Petheleyne DPC.
  • Colour Black / Grey.
  • Bespoke options accomodated.

Provides interfacing between horizontal cavitray and vertical cavity closer at opening onto balcony thus preventing closer water gravitating below the critical level of protection. Introduces integral stopend at vulnerable dooframe termination point.


An appropriately profiled cavitray is required where a balcony extends outwardly from the face of the building. Where a doorway interrupts any such arrangement, water penetrating in the vicinity of the vertical cavicloser must be prevented from gravitating below threshold level and/or below the horizontal arrestment level. This applies where a balcony structurally links through the wall interrupting the open cavity, and/or where the area below the balcony is not an open space because it is within the building envelope. The Type GBOT Balcony Opening Tray provides preformed positive way of linking vertical and horizontal protective mediums.

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