Guttering & Downpipe

Guttering & downpipe systems are essential components of any building's rainwater management, channelling water safely away from roofs, walls, and foundations to prevent costly damage. A properly installed gutter and downpipe setup protects your property from water ingress, damp, and structural deterioration, making quality materials and correct sizing critical for long-term performance.

Our Guttering & Downpipe Range

We stock a comprehensive selection of rainwater goods to suit residential, commercial, and agricultural applications.

• Half-round guttering: the traditional choice for most Irish homes, available in various widths to handle different roof spans and rainfall volumes.
• Square-line and ogee profiles: modern aesthetics with excellent water capacity, ideal for contemporary builds and extensions.
• Cast iron effect systems: authentic heritage appearance in lightweight, durable PVC for period property restorations.
• Round and square downpipes: multiple diameters available to match your gutter system and discharge requirements.
• Fittings and accessories: unions, angles, brackets, hoppers, and leaf guards for complete, secure installations.
• High-capacity commercial systems:industrial-grade options designed for larger roof areas and heavy-duty drainage demands.

For projects requiring full rainwater and waste solutions, explore our complete Civil Drainage Systems range, including Soil & Vent pipework for internal waste management.

When selecting your system, consider roof area, local rainfall intensity, and the number of downpipe outlets required. Oversized gutters prevent overflow during heavy downpours, while matching all components from the same range ensures watertight connections and a consistent finish.

Why Choose McMahons for Rainwater Systems?

With nearly 200 years serving the Irish building trade, we understand what works in our climate. Our branches carry trusted brands in stock, with knowledgeable staff ready to help you calculate requirements and select the right profile for your project. Whether you're replacing a single section or fitting out a new build, speak to one of our experts for tailored advice on your rainwater drainage needs.