Application

  • Traditional and timber frame construction compatible.
  • New work applications. Retrofit possible (consult manufacturer for details).
  • If using a Continuity Cavicloser, the Type GBOT permits any partial fill insulation to be splay cut and the thermal enhancement provided by the cavicloser core projection to continue into the tray base.

Description

The bespoke Type G balcony opening tray provides interfacing between horizontal cavitray and vertical cavicloser at openings onto balcony thus preventing closer water gravitating below the critical level of protection. Introduces integral stopend at the vulnerable doorframe termination point. To be incorporated under sill of exterior doors where building extends beyond sill at lower level.

An appropriately profiled cavitray is required where a balcony extends outwardly from the face of a 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 cavitray 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 a preformed positive way of linking vertical and horizontal protective mediums.

The tray is normally supplied in three sections. A centre section accommodates the frame sill, and two side sections, each of which receives the reveal vertical closer and extends to provide an integrating link with the adjoining cavitray horizontal protection.

Water gravitating between the closer anti-capillary fins (demanded by Building Regulations to be on the face of the closers) is arrested before it has opportunity to discharge downwardly and soak into the building.

In those instances where traditional structural reveal closing with a flexible vertical DPC is proposed, the side sections are differently shaped to accommodate the masonry and DPC, with or without accompanying vertical insulation.

Features and benefits:

  • Integrates vertical and horizontal damp proof course (DPC) mediums.
  • Establishes stopends to opening.
  • Prevents cavicloser discharging below the intersection.
  • Does not extrude or compress under load.
  • Chlorofluorocarbons (CFC) free and has Zero Ozone Depletion Potential (ODP).
  • May be used if cavity insulation present, pending type and placement.
  • Two format options available - consult manufacturer for details.

Applications:

  • Traditional and timber frame construction compatible.
  • New work applications. Retrofit possible (consult manufacturer for details).
  • If using a Continuity Cavicloser, the Type GBOT permits any partial fill insulation to be splay cut and the thermal enhancement provided by the cavicloser core projection to continue into the tray base.

General information

Size

As drawing

Insert drawing number.

Uniclass 2015

Pr_25_57_21_66 Preformed cavity traysPrimary

CAWS

F30/270 Meshwork joint reinforcement

F30/56 Preformed cavity trays

Specification data - Preformed cavity trays

Product Reference

Type GBOT

Size

As drawing

Insert drawing number.

Standard product features

Technical characteristics:

  • Material: Polypropylene and petheleyne.
  • Dimensions: Length and dimensions varied to suit.
  • Colour Black/ grey.
  • Cavity width: 50–160 mm.
  • Masonry skin styles: Available for all skin styles.
  • Undulating masonry faces: Compatible in most instances.
  • Arrested water evacuation: Via Caviweep(s) per tray.
  • Thermal transmission (U-Value) of material: Negligible - 0.15–0.17 W/m²K.

Literature
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