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roof underlays mdm Ventia

mdm® Ventia Q breathable roof underlay


A difussive roof underlay of the highest quality, three-layered, weight 230 g/m2 and thickness of 900 μm. It represents very high mechanical resistance and water vapour permeability (Sd = 0,04 m). It can be used both directly on thermal insulation or laid on a full boarding. It is used for various types of roofing: shingles, concrete and ceramic tiles, metal sheets, sheet metal tiles. mdm® Ventia Q underlay is a premium class product!

Above average functional layer thickness protects the membrane against UV rays - even up to 6 months! mdm® Ventia Q membrane provides the highest comfort for roofers - its advantages are: versatility, high resistance, handy roll and lack of reflection (used dark nonwovens). From the users’ point of view, this membrane is a perfect solution for house construction, ensuring very good protection, exceptional durability and aging resistance.

Use with full boardnig YES
UV resistance*
concerns average yearly radiation in the Central European climate
6 months
The membrane is available also in a version with glue stripes applied in the production stage (single strip of glue index- T; double strip of glue index - TT).


polypropylene nonwovens laminated with microporous polypropylene film


lenght: 50 m
width: 1,5 m

quantity per pallet:

Palett dimensions: 1540x1170x1200
m²/palett|: 1500 m² / 20 rol.

version without integrated glue strip
version T - with integrated glue strip
version TT - with integrated glue strip