25mm Eaves Vent System

  • Simple, fast installation
  • Dry fix system
  • Allows clip fixing of tiles at eaves
  • Compresses insulation ensuring airflow
  • Prevents ponding of water
  • Prevents ingress of birds, vermin and insects
  • Meets BS 5534 requirements and NHBC guidelines


Marley Universal Eaves Ventilation Systems are designed to provide continuous 10mm or 25mm free vent areas to roof voids in an efficient and unobtrusive manner for roof pitches from 12.5°to 55°. The 25mm system can also be used to ventilate the batten cavity where this is required. Additionally, the system allows clip fixing of all tiles at the eaves, compresses insulation to ensure good airflow and will prevent ponding on the underlay behind the fascia board as well as ingress of all wildlife.

Function & Compatibility

  • 25mm continuous ventilation at eaves
  • 25,000mm2 free area of ventilation per linear metre
  • 12.5°-55° pitched roofs
  • Eaves-to-ridge or eaves-to-eaves ventilation
  • Suitable for all Marley tiles and slates
  • Suitable for other manufacturers' tiles and slates
Technical Data
  • Continuous rafter roll fits rafters from 400 - 600mm
  • When used with plain tiles the felt support tray must be substituted with a 6mm plywood strip, supported by timber fillets at each rafter

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