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Over Fascia Vent

Installation Advice

  • Use product 3011 to ventilate pitched roofs, where the pitch of the roof is 15° or more, and the roof void is an attic or loft space
  • Use product 3011-25 to ventilate pitched roofs, where the pitch of the roof is less than 15°, the roof is flat, or the roof is one where living accommodation is contained within the roof space
  • Make sure that each ventilator is fixed securely into the top of the fascia board using at least 3 screws or nails per ventilator
  • On pitched roofs it is advisable to provide a felt support above the fascia ventilator, that projects at least 10mm beyond the front of the ventilator. This will prevent the felt from sagging behind the fascia board, whilst maintaining a clear air path at the front
  • When ventilating flat roof abutments wth product 3011-25 some extra joinery work is essential
  • Ventilation must be provided for the full length of the eaves and along both sides of the building to create a cross flow ventilation action
  • nbs plus
  • riba

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