Our Guttering & Downpipes FAQ provides expert advice on choosing the right rainwater system for your property. Whether you're comparing Half Round, Square Line, Ogee, Deep Flow, or Commercial guttering, you'll find answers to common questions about gutter sizes, downpipes, compatibility, installation, maintenance, and accessories. Learn how to select the best PVC guttering system for your home or commercial building, prevent overflow issues, and keep your rainwater system performing efficiently for years to come. Perfect for homeowners, tradespeople, and contractors looking for reliable guttering guidance and practical installation tips.
What type of guttering do I need for my property?
The best guttering system depends on your property's roof size, rainfall exposure, and appearance requirements.
• 112mm Half Round Gutter is the most popular choice for standard residential properties.
• 114mm Square Line Gutter offers a modern appearance and excellent water flow.
• 135mm Ogee Gutter combines a traditional decorative profile with high-capacity performance.
• 116mm Deep Flow Gutter is ideal for larger roofs and areas with heavy rainfall.
• 150mm Commercial Gutter is designed for warehouses, agricultural buildings, and commercial premises.
What is the difference between Half Round and Square Line guttering?
Half Round guttering features the traditional curved profile seen on many homes across the UK. It is cost-effective, easy to install, and suitable for most domestic applications.
Square Line guttering has a more contemporary appearance with straight edges and slightly increased water-carrying capacity, making it a popular choice for newer properties and extensions.
What is Ogee guttering?
Ogee guttering features a decorative "S-shaped" profile that replicates the appearance of traditional cast iron guttering while offering all the benefits of modern PVC construction. It is suitable for both residential and commercial properties and provides a larger water capacity than standard domestic gutter systems.
When should I choose Deep Flow guttering?
Deep Flow guttering is designed for situations where a standard gutter may not be sufficient. It is ideal for:
• Large roof areas
• Properties in regions with high rainfall
• Conservatories and extensions
• Buildings with steep roof pitches
Its deeper profile allows it to handle larger volumes of rainwater efficiently.
What size downpipe do I need?
The most common options are:
68mm Round Downpipe
Suitable for:
• Half Round Guttering
• Deep Flow Guttering
• Most standard domestic properties
65mm Square Downpipe
Suitable for:
• Square Line Guttering
• Ogee Guttering
• Modern residential properties
Choosing the correct size ensures efficient drainage and helps prevent overflowing during heavy rain.
Is plastic guttering better than metal guttering?
Plastic guttering offers several advantages:
• Lightweight and easy to handle
• Corrosion and rust resistant
• Lower maintenance requirements
• Cost-effective compared to metal alternatives
• Easy to cut and install
• Wide range of colours and styles available
Modern PVC guttering is highly durable and designed to provide many years of reliable performance.
How long does plastic guttering last?
High-quality PVC guttering can typically last 20 years or more when correctly installed and maintained. Regular cleaning and inspections will help maximise the lifespan of your gutter system.
What colours are available?
Many gutter systems are available in:
• Black
• White
• Brown
• Anthracite Grey
Colour availability may vary depending on the gutter profile and fittings selected.
Are your gutter systems compatible with other brands?
Many modern PVC gutter systems are manufactured to recognised industry standards and are designed to be compatible with similar profiles from major manufacturers. However, we always recommend checking dimensions and compatibility before ordering replacement parts. However, we always recommend checking dimensions and compatibility before ordering replacement parts. Our standard half round and square line are compatible with other brands including the following.
• Aquaflow
• Brett Martin
• Floplas
• Hepworth
• Hunter
• Kayflow
• Marley
• Marshall Tufflex
• Osma
• Polypipe
What fittings do I need to install guttering?
A typical gutter installation may require:
• Gutter lengths
• Running outlets
• Stop ends
• Union brackets
• Fascia brackets
• Angles and bends
• Downpipe brackets
• Downpipe connectors
• Downpipe shoes
The exact fittings required will depend on your property's layout and gutter design.
Do I need gutter guards?
Gutter guards, brushes, and leaf protection systems can help reduce blockages caused by leaves, moss, and debris. They are particularly useful for properties located near trees and can reduce maintenance requirements throughout the year.
How often should gutters be cleaned?
Most properties should have their gutters inspected and cleaned at least once a year, typically when leaf fall has happened in the autumn. Properties surrounded by trees may require more frequent maintenance.
Can guttering be installed as a DIY project?
Many homeowners with basic DIY skills can install plastic guttering systems. PVC components are lightweight and designed for straightforward assembly. However, larger projects, high-level installations, or commercial systems may be best completed by a professional installer.
Why is my gutter overflowing?
Common causes include:
• Blocked gutters or downpipes
• Incorrect gutter fall or alignment
• Insufficient gutter capacity
• Damaged brackets or joints
• Excessive rainfall
Regular maintenance and choosing the correct gutter size can help prevent overflow issues.
What is commercial guttering used for?
Commercial guttering is typically used on:
• Warehouses
• Industrial units
• Agricultural buildings
• Retail premises
• Large residential developments
These systems offer significantly greater water-carrying capacity than standard domestic guttering.
Why choose CABP guttering products?
Our guttering range includes everything needed to create a complete rainwater management system, from domestic Half Round and Square Line profiles to high-capacity Ogee, Deep Flow, and Commercial systems. With a wide range of colours, fittings, and accessories available, we help homeowners, builders, and contractors find the right solution for every project.
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