NBS Source
Type PAT


  • Contaminated land application when integrated with adjoining elements.
  • Traditional and timber frame construction compatible.
  • Suitable for new and retrofit applications.


A three-dimensional damp proof course unit that is bedded within the external wall opening, providing both gas and water protection under and to the sides of every opening and eliminating discontinuity.

Features and benefits:

  • Supplied in one or more connecting sections to suit the structural opening dimensions.
  • Side connectors are provided with different projecting profile options to match the wall barrier profile.
  • Rising gas arrested and controlled.
  • Downward gravitating water evacuated.
  • Integrates with reveal Caviclosers.
  • Ensures uninterrupted dual protection.
  • Adjusts to construction course levels.
  • Compatible with numerous wall barrier profiles.
  • Designed solution for radon gas applications.
  • Does not extrude or compress under load.
  • Chlorofluorocarbons (CFC) free and has Zero Ozone Depletion Potential (ODP).
  • May be used if cavity insulation is present, with compliant insulation types.
  • Bespoke option available.

General information





Damp proof course.


As drawing, insert drawing number.


Pr_25_57_21_35 Gas-resistant damp-proof coursesPrimary


F30/270 Meshwork joint reinforcement

F30/360 Gas resistant damp proof courses/ cavity trays

F30/54 Gas resistant dpcs/ cavity trays

F30/56 Preformed cavity trays

Specification data - Gas-resistant damp-proof courses Enhanced data




Suitable for use with adjoining gas resistant dpms.

Cavity width

150 mm.

Up to 150 mm.

Thermal transmittance (U-Value)

0.15 W/m²K.


Similar products from Cavity Trays Ltd

Cavicloak Rise And Fall Barrier

Cavicloak Rise And Fall Barrier

Methane Barrier

Methane Barrier

Radon Barrier

Radon Barrier

Type TFC Timber Frame Cavitray

Type TFC Timber Frame Cavitray