List of featured suppliers of ROOF VALLEYS Troughs GRP BS 476 Part 3 on Building Products Index
A roof valley is a linear depression or fold in the roof where two roof planes meet and redirect rainwater runoff. A trough, in this context, refers to a channel or gutter that runs along the bottom of the valley to help guide the flow of water. GRP (Glass Reinforced Plastic) is a strong, lightweight material commonly used in construction for its durability and resistance to corrosion. BS 476 Part 3 is a British standard that outlines the fire performance of building materials and the requirements for fire tests on building elements.
