NBS Source
Intermediate Cavity Trays
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Description

A range of preformed intermediate cavity trays with BBA Certification. Manufactured from injection moulded polypropylene, the trays are available for stepped blockwork or stone details.


Features and benefits:

  • Supplied with or without lead attachment.
  • Suitable for pitches 17.5 to 50°.
  • Assessed by the British Board of Agrèment.


Product options:

- Type GW291 RH Intermediate Trays Right Hand:

  • Designed for building up the finished roof line in a stepped fashion and incorporate an upstand at one end only, allowing water to travel down the cavity tray system.
  • Type GW 291 Intermediate tray features an injection moulded mortar trap which ensures a clear water path, by reducing the risk of mortar droppings and other debris from blocking the tray.
  • The tray has a front mortar clip, removable once the mortar has set, leaving a 25 mm deep aperture into which lead is inserted and secured with lead wedges.
  • The GW 291 Intermediate tray can be supplied unleaded or with short or long lead, stapled and sealed to the tray.
  • Suitable for pitches 17.5 to 50°, 75 mm coursing.

- Type GW292 LH Intermediate Trays Left Hand:

Specification as GW 291 RH but left handed.

- Type GW 291 SBS RH Short Block / Stonework Intermediate Tray Right Hand:

  • Designed for larger course heights, typically 150 or 225 mm in either stonework or blockwork, and incorporates an upstand at one end only.
  • The flexible perpend protector attached to the tray prevents driving rain penetrating the outer wall and tracking across the masonry.
  • The tray has a unique front mortar clip that can be removed at any time once the mortar has set leaving a 25 mm deep aperture into which the lead is inserted into and secured with lead wedges.
  • The GW 291 SBS Intermediate tray can be supplied unleaded or with short or long lead, stapled and sealed to the tray.

Suitable for pitches:

  • 35 to 50°, 225 mm coursing.
  • 25 to 50°, 150 mm coursing.

- Type GW 292 SBS LH Short Block / Stonework Intermediate Tray Left Hand:

Specification as GW 291 SBS RH above but left handed.

- Type GW 291 LBS RH Long Block / Stonework Intermediate Tray Right Hand:

  • Designed for low pitches in typically 150 mm or 225 mm in either stonework or blockwork, and incorporates an upstand at one end only.
  • The flexible perpend protector attached to the tray prevents driving rain penetrating the outer wall and tracking across the masonry.
  • The tray has a unique front mortar clip that can be removed at any time once the mortar has set leaving a 25 mm deep aperture into which the lead is inserted and secured with lead wedges.
  • The GW 291 LBS Intermediate tray can be supplied unleaded or with short or long lead, stapled and sealed to the tray.

Suitable for pitches:

  • 17.5 to 34°, 225 mm coursing.
  • 12 to 24°, 150 mm coursing.

Type GW 292 LBS LH Long Block / Stonework Intermediate Tray Left Hand:

Specification as GW 291 LBS RH above but left handed.

General information

Color

Black

Material

Polypropylene

Uniclass 2015

Pr_25_57_21_66 Preformed cavity traysPrimary

CAWS

F30/370 Preformed cavity trays

Specification data - Preformed cavity trays Enhanced data

Third party certification

British Board of Agrément.

Material

Polypropylene.

Height

75 mm.

Attached lead flashings

Not required.

Short lead code 4.

75 mm drop.

Standard lead code 4.

150 mm drop.

Long lead code 4.

300 mm drop.

Standard lead code 5.

150 mm drop. Code 5 lead is supplied to special order.

Long lead code 5.

350 mm drop. Code 5 lead is supplied to special order.

Pitch

17.5–50°.

75 mm coursing.

Third party certifications

  • 01/3838

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