Vapour check membrane for external insulation and roof refurbishment

connect variant with self-adhesive strips


  • Protects building structures against weathering during the construction phase for roof pitches of 10° (2.1:12) and higher
  • Water-resistant and waterproof, can be walked on
  • Acts as a vapour check and airtightness layer simultaneously
  • Excellent values in hazardous substance testing, has been tested according to the ISO 16000 evaluation scheme

Areas of application

For use as a vapour check (alternate terms: vapour control or retarder) membrane and airtight membrane directly on top of sheathing underneath suitable external roof insulation made of all insulation materials on structures that are open to diffusion on the exterior (roofing underlay with SOLITEX MENTO 3000, for example).

In addition, DA can be used as an airtight membrane and refurbishment vapour check between two layers of insulation. All fibrous insulation materials can be used for insulation installed between rafters; the external roof insulation must be a foam insulation material (e.g. consisting of PUR, PIR or EPS). Please contact Technical Support at pro clima in Germany for assistance with calculating the thickness of the external foam insulation that is required from a building physics viewpoint. If necessary, the outer sealing layer should be implemented using a diffusion-open roofing underlay membrane (e.g. SOLITEX MENTO 3000).

Best possible protection right from the beginning

Particular features

The pro clima DA system can be used to achieve airtightness on all structures that are open to diffusion on the outside. Diffusion-open roofing underlay membranes (e.g. SOLITEX PLUS, the SOLITEX MENTO series or SOLITEX WELDANO), underlay panels made of wood fibre or medium-density fibreboard panels (MDF) can be used for this purpose.

The DA vapour check (alternate terms: vapour control or retarder) membrane has a 3-ply structure. Its functional membrane is reliably protected between two robust, particularly tear-resistant protective and covering fleeces made of polypropylene – which is ideal given the high loads that occur when installing or walking over the membranes and the external roof insulation.

The membrane is glare-free as a result of the green colour of the upper covering fleece. Thanks to its favourable sd value of 2.3 m (perm rating: 1.4 US perms) from a construction physics viewpoint, this membrane provides an additional reserve for drying out in the case of unforeseen entry of moisture for structures with fibrous insulation materials. This increases the level of protection for the overall structure and prevents the formation of condensate in summer in an effective manner.

Outdoor exposure to the elements

Fully resistant to driving rain
The special membrane between the protective and covering fleeces has a watertightness of over 2,500 mm (8' 2") of water column, i.e. it is watertight even when subjected to strong driving rain.

Three months of outdoor exposure
pro clima DA can be exposed to outdoor weathering for three months. It should only be fastened with staples in a protected manner in the overlap area. Any staples attached in the main surface area are to be covered with TESCON VANA.