Type W Extension Duct Cavity Trays - Cavity TraysType W Extension Duct Cavity Trays - Cavity Trays

Type W Extension Duct

  • Material polypropylene.
  • Colour grey.
  • Size:200/225 x 65 x 10mm.
  • 320mm²

To extend Type W to accommodate masonry of greater thickness.


The Type W extension duct is designed to push-fit onto the Type W Caviweep/Cavivent. It converts the standard Type W into a 305mm straight through model. It may also be used to extend the Type W when employed within a solid retaining wall to provide moisture release.

Downloads and Documents

Datasheet PDF187.42 KB Download file

View all resources

Need help?

Our experts are on hand to advise you about any of our cavity tray products.

Call 01935 474769

Where to buy

Our cavity trays are available from suppliers up and down the country.

Find a local SUPPLIER