This 3m GRP Dry Valley, also known as dry valley trough, is an economical and lightweight solution for discharging water from the roof via a mortarless system. Easily fitted under the batten and suitable for slates, interlocking and profiled tiles, the Under Batten GRP Dry Valley offers long-lasting strength without the need for costly lead and zinc roof valleys. Crafted from robust, UV stabilised Glass Reinforced Polyester, it provides a reliable roofing solution that is sure to fit your budget.