Products Catalogue
Fel'X Multi BACK

Flexible roofing underlay for fixing over rafters or fully supported on timber boarding.

  • Multi-purpose roofing underlay:
    • suitable for tiled or slated ventilated pitched roofing
    • for shingle roofing
  • Light, tear resistant and water resistant.
Main uses
  • For tiled or slated ventilated pitched roofing.
  • Also suitable as underlay for shingle roofing.
  • Can be applied either nailed on continuous substrate (timber boarding, plywood, wooden panels), or fixed taut over rafters.
  • The FEL’XMulti can be applied:
    • either fixed taut over rafters:
      • The distance between rafters needs to be of 0,90 m. maximum. The longitudinal overlap is 0.10 m for slopes over 30%, and 0.20 m for slopes below 30 %.
    • or nailed on continuous substrate (timber boarding, plywood, wooden panels):
      • See the current roofing regulations or codes of practice.
  • On both cases, FEL’X Multi is unrolled parallel to the gutter. The laying starts from the gutter to the ridge with an overlap as above mentioned. It needs to be fixed by large-headed nails at overlaps (0.33m distance).
  • At the eaves, it must cover the metal apron.
  • At the ridge, need of a 0.10 m ventilation space.
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