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Brick Superstore£11.04Visit shop Cavity Trays Black Type E External Cavitray Insert Into An Existing Wall - Universal Polypropylene
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The Type E External Cavitray by Cavity Trays is an essential solution for homeowners and professional builders looking to prevent moisture ingress in existing masonry cavity walls. Designed specifically for retrofitting, this product allows for effective damp protection with minimal structural disturbance, requiring the removal of only a single brick course. While it offers a highly efficient way to manage water and comply with building regulations, users should note that successful installation relies on accurate mortar bed removal and proper weep placement to ensure long-term functionality.
| Model Part Number | E AE |
|---|---|
| Brand | Cavity Trays |
No, standard masonry tools for brick removal and repointing are sufficient for installation.
The product is standard for 50mm to 140mm widths; for wider cavities, please consult the manufacturer for custom guidance.
Only a single course of bricks is required for the insertion of the tray.
Once the brick is replaced and pointed, only the subtle weep hole will be visible on the external wall.
The system includes preformed angles to ensure the DPC continuity is maintained around corners and piers.
Check that the weep hole is not blocked by mortar and verify that the internal upstand is properly sealed against the inner leaf.
Ensure the underlying mortar bed is uniform and that no excess debris is trapped behind the brick leaf.
Verify that you are using the correct orientation and that the edges of the trays are free from mortar residue before connecting.
Before starting the installation, ensure the cavity is clear of debris to prevent blockage of the drainage path. The unit is designed to be bedded into fresh mortar to create a seal against the internal leaf. When installing, ensure the weep hole remains clear of mortar droppings, as this is the primary exit point for water. The system is compatible with standard brick dimensions and is built from durable materials that do not require specialized maintenance. Regularly check external weeps to ensure they remain unobstructed by vegetation or debris to maintain effective drainage.
