Roofing Underlays

Waterproof underlays (felt) with thermal insulation capabilities


foundation systems


  • Vapour permeable roofing underlay protects even in extreme conditions.

  • DELTA-MAXX ensures extremely sure footing when working with ladders on roof battens.

  • Easy installation with its squared surface pattern: helps to cut straight edges.

  • Can be unrolled and lined up very quickly.

  • Germany’s most popular vapour permeable underlay for fully insulate pitched roofs.

  • Protect from rain, driven snow and permanent condensation problems.