FR250BR – Rytons Flat Roof/Abutment Ventilator (897mm L)

General Details

FR250BR – Rytons Flat Roof/Abutment Ventilator (897mm L)

  • Flat roof and abutment ventilator.
  • Fixed to the top of the facia board or timber upstand at the abutment, to introduce air into the roof void.
  • For roof pitches less than 15°.
  • Large fixing holes aid easy and accurate positioning on top of facia boards and upstands.
  • 4mm ventilation slots promote unrestricted air flow and prevent the entry of birds and large insects.


  • 897mm L x 68mm W x 27mm H (see image gallery above).
  • CAD drawing available by email.

Free Area:

  • 22,425mm² per length (25,000mm² per metre).
  • Equivalent to a continuous 25mm venting gap.


  • Brown.


  • High impact polystyrene.


  • Fix to the top of the facia board and overlay with plywood and felt. For an abutment installation first create a void by securing a softwood timber upstand to the roof timbers at the abutment (maintaining a gap of at least 25mm with the wall). Fix to the top of the upstand through the pre-formed slots across the top of the ventilator. A timber fillet should be placed on top of the ventilator before being dressed with lead.

Handling Information:

  • Box quantity: 20 lengths.
  • Box size: 102cm W x 12cm H x 35cm D.
  • Box weight: 3kg.

Reference Material:

  • British Standard BS 5250.
  • The Building Regulations, Approved Document C.
  • The Building (Scotland) Regulations, Mandatory Standard 3.15.
  • The Building Regulations (Northern Ireland), Technical Booklet C.
  • NHBC Standards, 7.1 Flat Roofs.

Rytons is proud to be a family run business and British manufacturer since 1972.

Quote Request


Please note: As a manufacturer, we deal exclusively with trade professionals and are unable to take price enquiries from members of the public.
We aim to respond to quote requests within the next working day.
In case of query please call 01536 511874, thank you.

Product required (product name and code):

Quantity required (box quantities may apply):

Colour required (RAL colour matching is available on some lines subject to an additional charge):

Notes or Additional Information:

Contact Name:

Company Name:

Email Address:

Contact Number (in case of query):