Refurbishment vapour check for 'sub-and-top' installation from the outside


  • Best possible reliability thanks to ‘sub-and-top’ installation
  • Protects building components: humidity-variable sd value allows for installation into the spaces between rafters and over the tops of the rafters
  • Time-saving installation: no adhesion to rafters required
  • No insulation cover necessary
  • Easy to work with: particularly robust thanks to fleece reinforcement
  • Excellent values in hazardous substance testing, has been tested according to the ISO 16000 evaluation scheme

Areas of application

Suitable as a ‘sub-and-top’ vapour check (alternate terms: vapour control or retarder) membrane and airtight membrane for all structures with diffusion-open roofing underlay membranes (e.g. pro clima SOLITEX). If the roofing underlay membrane is installed onto sheathing, the maximum permitted sd value of the underlay is 0.2 m (maximum g value: 1 MN·s/g ; minimum perm rating: 16.4 US perms). Also suitable in combination with wood-fibre underlay panels and MDF panels, and with fleece-laminated foam insulation materials (PUR, PIR, EPS etc.) with a thickness of 50 mm (2") and greater.