Cavity Trays Ltd

Type E Cavitray

for insertion into existing
walls

in brief...

  • Brick-sized cavitrays permit progressive insertion
  • Anticapil interlocking to form long runs
  • Cavity widths compatible - upstand adjusts to suit
  • Unobstructed cavity compartment area with stand-alone discharge
  • Easy compliance of building regulations
  • Minimal disturbance to masonry - fitted from outside

Ensure all installation is strictly in accordance with manufacturer's instructions.
Total run in metres = ..................
Request liability/conformity document upon completion.

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
See entry under Type E Remedial for solving dampness problems within existing structures. For new-build horizontal applications see Type G entry. Type E Cavitrays discharge arrested water via perp weepvents - see entries for Type W weepvent. Type Euroweepvent and Small weepvent.

Type E cavitrays used without flashing, over an existing opening where the original damp course has failed or has been omitted. The exact course in which the cavitray is introduced varies depending on the construction detail, (eg if there is an existing concrete lintel, it might be necessary to place the cavitray on top of the existing lintel, with the protective panoplied lip emerging). The flexibility of the Type E upstand makes it suitable for numerous cavity widths. In addition, non-standard special trays can be supplied, tailor-made to suit the application.

 

 

Step 1 - Three bricks are removed from the wall forming a 675mm opening (an angle grinder/cutter is ideal for cutting out).

Step 2 - One cavitray is inserted together with the flashing intended for dressing over the skirting of the roof finish (flashing approx 50mm into wall). Lead flashing is not required in most remedial applications.

Step 3 - Two bricks are replaced in the wall into the cavitray. They are jointed and securely slate pinned, leaving the wall above safe and firm.
A weepvent is incorporated in the middle perp. Two more bricks are removed again forming a three brick space. The flashing is extended and a second cavitray inserted. The integral U clip joins the trays, ensuring that no water can penetrate. Two more bricks are inserted and a weephole again formed. There are now two adjoining but completely self-contained cavitrays. The method is continued until the required run is complete. (Always bed on mortar. Do not dry-bed.)


technical
observations

Positive jointing integral
anticapil clip eliminates
gluing, sticking or over-
lapping. Shape and depth
of projecting lip prevents
discharge water
permeating the bedding
joint - on often overlooked
consideration on exposed
sites. Adjustable cavity
upstand accommodates
cavity size variations.
Unobstructed tray, cavity
compartment. Features
classify Type E cavitray
as high performance.
Branded with name and
logo as proof of type and
accompanying warranty.



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