GRP Fibreglass Internal Roof Outlet (50–100mm)

These vertical outlet drains are supplied with an integral fibreglass mesh flange, providing effective bonding with GRP and polyurethane liquid roofing systems. The mesh reinforcement is particularly well suited to use with water-based liquid waterproofing materials, helping to achieve a secure and durable connection.

The polypropylene flange features a knurled surface on both faces, designed to improve adhesion of liquid-applied membranes and enhance long-term performance. The spigot incorporates stepped detailing at the upper section, allowing any incidental water ingress above the waterproofing layer to be collected and directed away from the roof construction.

Available in a range of outlet sizes to suit common drainage requirements.

Key Features

🫟 Integral fibreglass mesh flange for bonding to GRP and polyurethane systems

💧 Suitable for use with water-based liquid waterproofing materials

🕸️ Polypropylene flange with dual-sided knurled surface for improved adhesion

📏 Available in 50mm, 75mm, 82mm and 100mm diameters