Corodrain Valley Troughs

The Corodrain range of BBA approved valley troughs are manufactured in GRP as an economic and durable alternative to using lead and all conform to NFRC Technical Bulletin 28. Corodrain valley troughs can be used on both slate and tiled roofs and with any combination of double or interlocking slates, clay or concrete tiles. Corodrain can also provide a weatherproof seal between roofs of terraced houses or where a new roof needs to join an existing roof.  Options include A, B, D and E valleys and also the Diamond 60 range of D and B valleys with enhanced durability which has been recognised as matching code 7 lead.

For the complete Ariel range

Ariel Product Guide

Products

  • Use for Roofs with pitches from 22.5° to 49°

    A Type Universal Valley Trough

    A narrow valley trough for use with single lap tiles

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  • Use for Roofs with pitches from 17.5° to 55°

    B Type Valley Trough

    Use with double lap slates and tiles, which are dry bedded.

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  • Use for Roofs with pitches from 17.5° to 55°

    D Type Universal Valley Trough

    A narrow valley trough for use with single lap tiles

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  • Use for Roofs with pitches from 22.5° to 49°

    E Type Valley Trough

    A narrow valley trough for use with single lap tiles

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  • Use for Roofs with pitches from 17.5° to 55°

    Diamond 60 B Type Slate Valley

    Patented surface protection designed for very harsh environments or presti…

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  • Use for Roofs with pitches from 17.5° to 55°

    Diamond 60 D Type Universal Valley

    Patented surface protection designed for very harsh environments or presti…

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Why Corodrain Valley Troughs

  • Manufactured in GRP a durable and economic alternative to lead
  • More resistant to damage and theft
  • Maintenance free
  • UV light and acid rain resistant
  • Smooth finish inhibits growth of moss or build up of debris
  • Conform to NFRC Technical Bulletin 28
  • Largest range of lengths available
  • BBA approved 
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