Choose the right guttering system
112mm half round guttering has the familiar curved profile, 114mm square guttering gives a straighter square finish, and 116mm deepflow guttering uses a deeper profile where a higher-capacity rainwater system is required.
Match existing guttering before ordering replacement fittings
Round and square systems can look similar from a distance but replacement fittings still need to match the existing profile and system. If you are unsure what is already fitted, bring a sample fitting or short offcut to the yard so we can help compare it before you buy.
What do I need for a gutter run?
A typical run uses gutter lengths, fascia brackets, unions, an outlet, stop ends and any required angles. The outlet then connects into the downpipe system, with compatible bends, clips, connectors, branches and shoes used to complete the route to the drain or discharge point.
Set the outlet first and run the gutter towards it
Position the outlet before setting the rest of the run, then use a string line to establish a consistent fall towards it. Follow the bracket spacing stated for the system being installed. As a quick planning estimate, dividing the gutter length in millimetres by around 600 gives a useful starting point for bracket quantity; older roofs or roofs that regularly shed moss may benefit from closer support.
Cut, dry-fit and water-test the system
uPVC guttering can be cut with a suitable fine-tooth saw or plastic-cutting blade. Dry-fit the route before finalising the installation, then run water through the finished system to check the fall, outlets and joints before considering the job complete.