ONDUTISS Underlayers Installation

1. Roll out ONDUTISS in parallel with the gutter, starting from the bottom, always the printed side facing up. The membrane can be laid directly on the thermal insulation with slight tension.
 

2. Fix the bands directly to the rafters with a stapler. Nail counter batten on top of the membrane through to the rafters to protect the fixing area.

3. In case of any protruding element, cut ONDUTISS across the width and turn up on the protruding elements (chimneys, ventilations, windows etc.). Fix ONDUTISS with ONDUTISS sealing tape.

For other types of membranes and detailed fixing guide, have a look at the brochure below.