Type Y Stone Mullion Assembly Cavitray

A preformed multiple cavity tray system designed to maintain damp course integrity at the head or head and label course in cast stone or natural stone window or door surrounds.

The systems consists of three components:

  • An arresting barrier above any label course.
  • A cavity tray above the opening head and bedded on any structural support angle.
  • A vertical damp proof course (DPC) barrier between the back of the opening head and internal leaf lintel.

The Cavity Tray range of stop ends and weep vents is compatible with the arresting barrier and cavity tray.

General information


Black polypropylene

Uniclass 2015

Pr_25_57_21_66 Preformed cavity traysPrimary


F30/370 Preformed cavity trays

F30/385 Junction cloaks/ stop ends for preformed dpcs/ cavity trays

F30/56 Preformed cavity trays

Specification data - Preformed cavity trays

Product Reference

Type Y Stone Mullion Assembly Cavitray


As drawing ___

As schedule ___

Cavity width

50 mm

___ mm

Masonry opening head assembly

As clause ___

Standard product features


Black polypropylene.

Product Options

Size/ configuration:

The system can be tailored to suit all cast stone assemblies. Consult Cavity Trays Ltd for details and recommendations.

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