Delta PT 3mm is  a high-density polyethylene (HDPE) low-profile studded membrane designed for damp and contaminated walls, or where fast reinstatement of wall finishes is required after chemical damp-proof injection.

Key features

  • Suitable for damp-proofing

  • Provides key for plaster, renders or dab fix

  • Controls damp, salts and isolates other wall contaminants

  • Effective barrier to the transmission of salts, liquid water and water vapour

  • A “reversible” system, which will minimise damage to historical or heritage structures

  • Resistant to chemicals, root penetration, rot-proof and neutral towards drinking water

  • Fast-track installation

  • Suitable for new, existing and retrofit barn conversions

  • As part of a damp-proofing system

  • Refurbishment of contaminated walls

Product Details

  • Product Code: 027

  • Material: High Density Polyethylene (HDPE)

  • Sheet Thickness: 0.4 mm

  • Stud Height: 3 mm

  • Roll Size: 2 x 20m

  • Air Volume Between Studs: 2 L/M²

  • Temperature Resistance: -30°C to +80°C

  • R Value: Theoretical value: based on a supposed specific thermal conductivity of HDPE 0,42 W/m x K, the R value would be 0,001

  • Reaction to Fire: EN13501-1 Class E

Delta PT 3mm is fixed to the wall using Delta PT Plugs, or on softer more friable surfaces, Delta FlexiDri Plus Plugs. Fixings are installed at 250mm vertical and horizontal centres.

Joints between sheets of the Delta PT 3mm mesh membrane are sealed using Delta Tape, Delta Mastic, or where butt-jointed, using Delta Fleece Tape.

Renders and plasters are applied to the Delta 3mm mesh membrane in two coats by trowel. The first coat is pushed into the dimples, and giving cover to the mesh of 6mm, this should be lightly scratched and allowed to dry before the second coat of 9mm is applied. Skim finishes can be applied in the normal way.

When dab-fixing plasterboards to Delta PT 3mm, dabs are applied directly over the fixing heads, the adhesive dabs should cover at least 50% of the surface of the Delta 3mm membrane.

Air-gap membranes are particularly useful in projects that require water­pro­ofing, damp-proofing or a barrier against contamination, especially in barn conversion projects.