Aluminium Downpipes
Upgrade your rainwater system with high-performance aluminium downpipes that combine modern reliability with classic charm. Ideal for both traditional and contemporary builds, our range includes cast aluminium downpipes and aluminium hoppers and downpipes—crafted for long-term durability, easy installation, and architectural style.
✅ Cast Manufactured by Alumasc – renowned for British-made, heritage-compliant systems
✅ Available in cast, swaged, square, and round profiles
✅ Textured black finishes ready in 24 hours
✅ Choose from 26 Standard RAL colours – delivered in just 10 working days
✅ BBA-approved powder-coated finishes for long-lasting colour and protection
Why Choose Aluminium Downpipes?
✔ Stronger Than Steel, Lighter Than Cast Iron
Aluminium downpipes offer a superior combination of strength, light weight and weather resistance. Unlike steel, aluminium will not rust. Unlike cast iron, it's easier to handle and install—without compromising on visual quality.
Perfect for:
- 🏡Heritage properties
- 🏢Commercial buildings
- 🏗Traditional-style new builds
- 🛠Fast-track construction projects
Manufactured to BS 8530 standards, these systems are trusted by architects, installers and homeowners across the UK.
Cast Aluminium Downpipes – Period Detail with Modern Performance
Looking for a traditional aesthetic? Our cast aluminium downpipes are ideal for listed buildings, conservation areas and period restorations.
Each piece is cast for authenticity, with options for eared sockets, period-style collars and matching aluminium hoppers to complete the look.
✅ Manufactured by Alumasc in
the UK
✅Heritage-compliant profiles
✅Supplied with traditional eared brackets
✅Can be paired with Alumasc cast aluminium gutters and hoppers
Available Finishes & Colours
All downpipes are factory-finished using Alumasc’s BBA-approved
polyester powder coating process (Certificate No. 86/1671), ensuring
long-lasting performance and low maintenance.
🎨 Textured Black –
Ready in 24 hours
🎨5 Other Textured Finishes – Delivered in 15 days
🎨26 Standard Matt RAL Colours – Delivered in 10 days
🎨Plain Mill Finish – For on-site painting or custom treatment
🎨Custom RAL/BS Colours – Available on request
Looking to match with existing doors, windows, or fascia?
Simply place your order and we’ll contact you to confirm the colour required.
Aluminium Downpipe FAQs
Cast aluminium has a more traditional, textured appearance and is often used in period properties. Extruded aluminium is smoother, often used in contemporary buildings. Both are equally durable.
Yes – especially our cast aluminium downpipes, which replicate original cast iron profiles and comply with heritage specifications.
If you need help choosing a rainwater system, please contact our experienced team at info@tradewarehouse.co.uk.
Yes – we offer 26 Standard Matt RAL colours and can also provide custom RAL or BS finishes on request.
Yes, you should leave a 4mm expansion gap between the pipe end and socket and insert 6mm backing foam into the pipe joint.
Typically, 25 to 40 years, depending on environmental conditions. They require little maintenance and won’t rust, warp, or split.
Yes – we stock a full range of aluminium hoppers and downpipes to ensure a consistent finish and style.
Any other questions?
If we still haven't answered your question, you can contact us below, and we will respond as soon as possible.