Bonding gutters are used to create a weatherproof junction between two adjoining roofs, protecting from rainwater ingress and debris. They are typically used in locations where two roofs have differing coverings which cannot be tied in, or were constructed at different times.
Commonly used on semi-detached or terraced properties over party walls, bonding gutters are used to form a neat and durable transition between adjoining roofs. They may also be used in re-roofing or extension projects, where a property may have an existing roof and a new roof that meet.
Bonding gutters are installed under the roof tiles, running from the eaves to the ridge, and include raised channels at the sides that collect and direct water into eaves gutters.
A central upstand forms a weatherproof barrier between the two roofs, preventing water from flowing down one side and onto the other roof. Instead, water drops into the gutter channel below and flows downward to the eaves gutters. The upstand also prevents water from travelling across the two roofs through capillary action, and, once the tiles are cut and installed neatly to each side, helps to keep leaves and other debris from entering the roof.
Marley’s bonding gutters are made from GRP, which is resistant to corrosion and rot. They are designed for quick and easy installation using dry-fix methods in accordance with BS 5534:2014+A2:2018, the code of practice for slating and tiling for pitched roofs and vertical cladding. Bonding gutters are fixed directly to the roof battens, removing the need for lead and mortar at roof junctions, which reduces installation time and associated material costs.
The choice of bonding gutter depends on the roof construction and the type of coverings on each property. Marley offers two bonding gutter options. Both measure 210mm wide and are provided in lengths of 3m; the main difference is the height of the central upstand.
Explore our bonding gutter range to choose the right option for your next project.
Disclaimer - The information shared in this blog is correct at the time of publication. Guidance, standards, and best practices may change over time, so if you’d like further clarification or the latest updates, please get in touch with the Marley Technical Advisory Team, who will be happy to help.