Manthorpe Building Products

Roof Ventilation

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GRP Valley Throughs & Flashing

Manthorpe’s valley troughs and flashings offer a cost effective and durable alternative to more traditional roofing materials such as lead.

All the valleys and flashings in the Manthorpe range are pre-formed and are easily cut which significantly reduces fitting times for the contractor.

Weatherproofing and durability are two of the major design criteria and, as such, all valleys and flashings have a thick and durable UV resistant coating. This ensures a 30 year maintenance free life expectancy.

Product Benefits

  • Valley troughs available for slates and tiles
  • Roof abutment flashing strips
  • Secret joining strips to weather between 2 separate roof coverings
  • UV stable GRP
  • Sanded strips provide excellent mortar keys

Secret Joinging Strip in Situ


Product Specifications

Product Code Description Width Length Material Pack Qty
GTB13 Valley Troughs for Tiles – Batten Fix 360mm 3.0m GRP 10
GTB14 Valley Troughs for Tiles – Batten Fix 400mm 3.0m GRP 10
GTB23 Valley Troughs for Tiles – Batten Fix 360mm 2.4m GRP 10
GTF13 Valley Troughs for Tiles – Flat Fix 360mm 3.0m GRP 10
GTF14 Valley Troughs for Tiles – Flat Fix 400mm 3.0m GRP 10
GTF23 Valley Troughs for Tiles – Flat Fix 360mm 2.4m GRP 10
GTF24 Valley Troughs for Tiles – Flat Fix 400mm 2.4m GRP 10
GSVT1 Slate Valley Troughs 320mm 2.4m GRP 10
GJS1 Secret Joining Strip 216mm 3.0m GRP 10
GJS2 Secret Joining Strip 216mm 2.4m GRP 10
GAS1 Abutment Flashing 140mm 3.0m GRP 10
GAS2 Abutment Flashing 140mm 2.4m GRP 10