Bitumen roofing felt underlay
ONDUTISS STRONG bituminous felt underlays effectively insulate the roof, protect the structure against mould and avoid lifting of small roof elements. They can also be laid under shingles as a roof underlayment.
ONDUTISS STRONG bitumen roofing felt underlays effectively protect and insulate your roof. They are suited to all types of building, both old and new.
ONDUTISS STRONG products are airtight, preventing pollen, sand and dust from penetrating your home.Our roofing felt also keeps out melting snow, preventing any leaks through the roof. Felt underlays are also designed to protect the home against fungus and mould growth.
ONDUTISS STRONG rolls are also installed as roof underlayments beneath shingles to ensure perfect watertightness and long life.
Are you carrying out renovation work?ONDUTISS STRONG felt underlay can also be used as temporary protection on your roof.
Discover our ONDUTISS STRONG bitumen roofing felt underlays.
- Width: 1 m
- Length: 30 - 50 m
- Surface weight: 450 g:m²
- Longitudinal tearing strength: 400 N/5 cm
- Transverse tearing strength: 280 N/5 cm
- Range of working temperatures: -45 to 80⁰C
- UV resistance class: W1
Have a look at our installation instructions below to install ONDUTISS STRONG very easily.