Designed as a cost effective alternative to lead, the 125 GRP Valley is easy to fix, durable and lightweight. Easily cut and available in 3m lengths, this product is ideal for all types of roof design which have a junction between two roof slopes. Performance Minimum pitch 17.5° Maximum pitch 45° Suitable for plan angles of 90° only Width of valley gutter 125 mm 125 GRP Valley can accommodate a 5° pitch variance between slopes The 125 GRP Valley is suitable for use with all our tiles and slates except Cambrian for which the Cambrian GRP Valley must be used.