At Roundtower Lime, we specialise in supplying premium rainwater goods that combine durability, performance, and heritage-appropriate design. Our range includes Cast Iron and Cast Aluminium gutters and downpipes, both ideally suited to conservation work, traditional buildings, and sympathetic new builds across Ireland.
We understand the architectural significance of maintaining historically accurate rooflines and drainage systems, which is why our rainwater goods are chosen by architects, conservation officers, contractors, and homeowners alike. Whether restoring a protected structure or enhancing a vernacular cottage, our products ensure long-lasting protection while maintaining visual integrity.
Our Rainwater Goods Range Includes:
🔹 Cast Iron Gutters & Downpipes
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Ideal for heritage and listed buildings
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Traditional half-round, ogee, and deepflow profiles
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Durable and heavy-duty with a lifespan of over 100 years
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Available primed or factory-finished in black (other colours available on request)
🔹 Cast Aluminium Gutters & Downpipes
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Lightweight yet robust
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Corrosion-resistant with low maintenance
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Compatible with both heritage and contemporary projects
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Available in a wide range of RAL colours
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Matches cast iron visually but is easier to handle on site
Why Choose Roundtower Rainwater Goods?
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Conservation Approved – Suitable for protected structures and period buildings
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Aesthetic Accuracy – Traditional profiles that mirror original historic details
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Longevity & Reliability – Built to withstand the Irish climate with minimal upkeep
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Full System Supply – Includes all fittings: brackets, angles, stop ends, hoppers, connectors, etc.
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Expert Advice – Our team can assist with product selection and technical queries
Frequently Asked Questions (FAQs)
What’s the difference between cast iron and cast aluminium gutters?
Cast iron is heavier, more traditional, and best suited for heritage properties where authenticity is key. Cast aluminium offers a similar aesthetic but is lighter, easier to install, and virtually maintenance-free.
Can these be used on listed or conservation buildings?
Yes. Both cast iron and cast aluminium systems meet the strict aesthetic and technical standards required for protected structures and are often recommended by conservation officers.
What colours are available?
Cast iron is typically supplied primed or factory-finished in black, though custom colours can be arranged. Cast aluminium systems come in a wide range of RAL colours for modern or traditional applications.
How long do these systems last?
Cast iron can last 100 years or more with occasional repainting. Cast aluminium has a lifespan of 40–60 years and requires little to no repainting due to its corrosion resistance.
Can I mix cast iron and cast aluminium components?
While it's technically possible, it's not recommended due to differences in thermal expansion and visual detail. We recommend using one system consistently throughout the installation.
