PHS Sd2 Vapour Control Membrane

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PHS Sd2 Vapour Control Membrane enables airtightness and vapour control in roof and wall connections.

PHS Sd2 Vapour Control Membrane has an optimum fixed vapour resistance level of Sd 2m. This allows for an ideal level of vapour control by preventing diffusion of internal humidity into the building envelope in winter and allowing back fusion from the building envelope in summer. This prevents a build-up of condensed water vapour within the construction that facilitates mildew growth and constructional damage.

The CE sign according to DIN EN 13984 gives the necessary assurance for the quality of the product.

Technical Details

Reaction to fire:                                                       Class E, 5.12 EN13984
Resistance to water penetration:                            Requirements met, 5.5 EN13984
Water vapour transmission:                                    8g/m2/24h, +/-5, 5.10 EN13984
Resistance to impact:                                              <800mm, 5.6 EN13984
Max tensile strength along MD:                               >175N/50mm, 5.11 EN13984
Max tensile strength across CD:                              >120N/50mm, 5.11 EN13984
Elongation along MD:                                               >70%, 5.11 EN13984
Elongation across CD:                                              >90%, 5.11 EN13984
Tear resistance along MD:                                       >120N, 5.8 EN1398
Tear resistance across CD:                                      >160N, 5.8 EN1398
Durability of water vapour resistance
against artificial ageing:
                                          Requirements met, 5.7 EN13984
Alkali resistance:                                                      NPD, 5.7.2 EN13984
Strength of the joint:                                               NPD, 5.9 EN13984
Straightness:                                                            75mm/10m, 5.3 EN13984
Mass per unit area:                                                   98g/m2, +/-8%, 5.4 EN13984
Resistance to water vapour diffusion:                     Sd 2m, -1/+5, 5.10 EN13984



  • Store in dry rooms from +5C to +25C, protected from UV-radiation,
  • The membrane should be applied perpendicular to the direction of the application surface i.e. studs, rafters and joists,
  • The membrane should be fixed with staples every 150mm or with PHS Double Sided Tape,
  • PHS Argo Joining Tape or a suitable PHS Grommet should be used for penetrations,
  • For bonding barrier overlaps, penetrations and repair spots, PHS Argo Joining Tape or a similar tape is recommended,
  • For connections co concrete or masonry PHS Internal Adhesive Sealant is recommended,
  • Ensure there is a 100mm overlap of the membranes and tape with PHS Argo Joining Tape or another suitable tape.


Box Quantity:        1