Cavity Trays Ltd

Type G Cavitray

general-purpose cavitray for
changes of level and building off the solid or ringbeam

in brief...

  • Easy and fast building-in with brickwork sized units
  • Adjoining lengths interlock
  • Adjustable upstand ensures cavity width compatibility
  • Traditional or timber frame construction
  • Unobstructed cavity compartment area
  • Establishes consistent build quality detail


technical
observations

Accommodates numerous
cavity sizes. Suitable for
traditional build and
timber frame
construction.
Projecting panoplied lip
ensures integrity along
bedding course.
Integral stopends ensure
correct termination of the
DPC tray against piers etc.
Unrestricted cavity
catchment compartment
moulding does not project
or encourage mortar
bridging. Positive uniting
sections not reliant on
site gluing and sticking.
Self-supporting.
Eliminates necessity to
line up outer and inner
support courses. Trasson
cavity upstand rises to
correct height. Branded
with name and logo as
proof of type and
accompanying warranty.

Two weeps per tray length. Always position weeps towards centre of tray. Ensure all joints are made positively and the cavity upstand takes up the correct position.

bill of quantity
wording
Type G general-purpose cavitray from Cavity Trays of Yeovil, Somerset BA22 8HU (01935 474769).

Size as standard (or specify size of trays required). Specify size of attached lead flashing (if appropriate).
Bed Type G cavitrays on mortar as work proceeds. Observe usual codes of practice and standards. Incorporate weepvents minimum of

 2 per cavitray length.
Schedule of tray lengths = ...........
(number) x 900 = ............
Infilling lengths = ........ (number x (length) = .........
Number of internal angles =
..............
Number of external angles =
..............
Request liability/conformity document upon completion. Linking with other trays Type G cavitrays can be used and linked with Type X cavitrays. Reference is made within the Type X cavitray pages.

building regulations
Building Regulations, British Standards and NHBC requirements may be satisfied with use of this product. See page listing references.

ordering
See inside back cover for immediate service throughout the United Kingdom.
Merchant distribution network.

related products and applications
For existing walls see Type E. Type G general purpose cavitrays require weepvents for water discharge. There are three styles available, see Type W weepvent, Type Euroweep-vent and Small weepvent.

Type G cavitray with lead attached used at a change of level to ensure the horizontal intersection is correctly damp-proofed and weatherproofed.

Unlipped Type G cavitray used as on arresting barrier, to minimise cavity wash within the cavity wall. This arrangement invisibly reduces the penetrating water volume at a level above a critical junction. Appropriate with some masonry details and commonly used over projecting string courses and features (see separate entry dealing with arresting barriers).

Type G cavitray used in ringbeam/concrete frame situation. The end upstands terminate against the vertical columns. The protective panoplied lip protects the bedding course.

Our experience over decades shows that a 12mm panoplied lip prevents wind-driven rain penetrating the bedcourse, whereas a shorter one does not give such protection.

Cavity Trays phone 01935 474769 fax 01935 428223 email enquiries@cavitytrays.co.uk