The Dryfix 225mm Bonding Gutter 3m 100mm Upstand (GDFBSUB100) is a high-performance, mortarless GRP (Glass Reinforced Polyester) roofing component engineered to create a secure, weatherproof junction between two adjacent roofs of different types, pitches, or construction materials. It is particularly effective for joining dissimilar properties, such as where a new extension roof abuts an existing building or where slate meets tile.
 
Featuring a generous 225mm width channel with a central 100mm upstand, this bonding gutter effectively separates the two roof surfaces while preventing water cross-wash and ensuring independent thermal movement. At 3 meters in length, the lightweight yet robust composite unit allows for fast, efficient under-batten fixing, completely eliminating the need for messy wet mortar beds along the party line.
 
Engineered for exceptional durability, UV resistance, and weather stability, the GDFBSUB100 will not rust, rot, or degrade under harsh environmental conditions. It provides a clean, professional, and maintenance-free water management solution that meets modern building regulations for property separation and weathering.