Onduline Roofing Sheet Valleys

Onduline Valley Unit
Code: ON1VAL
Onduline Colour -

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Code: ON1VAL
Availability: 231 In Stock

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  • Onduline Valley Unit (to accompany Onduline sheets) should be installed down the valleys of a roof prior to installing the roof sheets. 
  • Valleys are manufactured in the same material as the Onduline sheets in 1m lengths . 
  • Onduline' s properties ensure that it does not condensate which lends itself to a wide variety of applications including agricultural, industrial, light domestic and under tile systems.
  • The wings measure 250mm each and the flexible nature of the ridges allows it to adjust ton a wide range of roof pitches. 
  • Each valley should be lapped by 125mm giving a cover width of 875mm per ridge.
  • We stock the valleys in four different colours: Black, Red, Brown & Green.
  • We also supply all Onduline Ridges, Verges and other fixtures and Fixing Nails so that you can do a complete job to match your requirement.

  • Length: 1000mm    
  • Coverage: 875mm
  • Dimensions: 250mm x 250mm
  • Material: Bitumen
  • Weight: 1.2kg
  • Application: Exterior
  • Lightweight & easy to handle
  • Easy to install
  • Made from the same material as the sheets
  • Colour matched to the sheets
  • Adjusts to different roof pitches 


  • What is a valley flashing used for?
    A valley flashing is used to collect water from two slopes and directs it down to the gutters.

  • Are these adjustable to different roof pitches?
    An apron flashing is flexible and should adjust to most roof pitches.

  • How much should I overlap the valleys?
    You should overlap each valley by 125mm.