Home > Companies > Manthorpe Building Products Ltd > Horizontal Cavity Trays

Manufactured from injection moulded polypropylene the trays are available for horizontal blockwork or stone details.

The products are supplied with or without lead attachment.

Manthorpe cavity trays have been assessed by the British Board of Agrèment.


Product reference:

- Type GW 295 Horizontal Tray:

  • Designed for straight, horizontal abutments in new build applications.
  • Integral stop ends and a hook feature remove the need to overlap the trays, providing a total effective length of 900 mm.
  • Two G950 Weep Vent or G951 Peep Weeps must be used in conjunction with this tray spaced at 450 mm centres to meet current NHBC Standards.
  • 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 295 Horizontal tray can be supplied unleaded or with short, standard or long lead, stapled and sealed to the tray.

Lead flashing:

Leaded trays available with the following:

  • 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.
  • Long lead code 5–350 mm drop.

(Code 5 lead is supplied to special order).

NBS Specification

NBS Create logo
This product is associated with the following NBS Create clause:
45-25-20/415 Preformed cavity trays

NBS Specification

NBS Buliding logo
This product is associated with the following NBS clauses:

Product specification

An important note about specifying



Manthorpe Building Products Ltd


+44 (0)1773 303000

Product reference

GW 295

Lead flashing

[Short lead code 4]
[Standard lead code 4]
[Long lead code 4]
[Standard lead code 5]
[Long lead code 5]
[Not required]


[G 950 Weep Vent]
[G 951 Peep Weep]

Manufacturer details

Manthorpe House,
Brittain Drive,
Codnor Gate Business Park,
Derbyshire, DE5 3ND
Tel +44 (0)1773 303000
Fax +44 (0)1773 303300
NBS Plus