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Restore cast iron gutters.
Period cast iron gutters stripped, primed, painted and re-hung — proper heritage work, not uPVC replacement.
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Top tips
Hiring a guttering, without the regret.
Four moves that separate a smooth job from a nightmare.
Rust at joints
Worn paint or bedding compound lets rust into the joint. Repaint every 8–10 years and re-bed every 25 years.
Bracket pull-out
Heavy cast iron pulls cheap fixings out of rotten fascia. Re-fix into solid timber.
Frost cracks
Standing water freezes and cracks the cast iron. Clean gutters annually.
Paint flaking
Wrong primer (especially modern emulsion direct to cast iron) flakes within months. Always use zinc-rich primer first.
Costs & timeline
Know what it costs. Know when it ends.
Indicative UK ranges and what affects price.
Cost range
By job type
Inc. VAT · 2026
Source: NMT quotes
Source: NMT quotes
Cast iron gutter per metreHalf-round, ogee or moulded
£45–£85
Cast iron downpipe per metre2.5", 3" or 4"
£40–£80
Brackets, joints, outletsPer fitting
£15–£40
Install labour, semi3–4 days, two specialists
£1.2k–£2.4k
Install labour, detached5–7 days
£2.2k–£4.5k
Cast-iron-effect aluminiumPer metre, 50% lighter
£25–£45
!
Quote spread is typically ± 18% — always get 3 quotes.
At a glance
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Guttering explained
Cast iron gutters are the heritage choice for Georgian, Victorian and Edwardian homes — the look is unmistakable from the ground, and a properly painted cast-iron system lasts 80–120 years. Expect to pay £1,800–£6,500 fitted in the UK depending on house size, profile and access.
What Does the Work Involve?
Cast iron is heavy — a 6ft length of half-round weighs 18 kg, a 6ft moulded ogee weighs 25 kg. Brackets must be screwed into solid timber or masonry, not rotten fascia. Joints are bedded in a flexible mastic and bolted together. The whole system is primed with zinc-rich primer and painted with two coats of oil-based eggshell. Many contractors now fit cast-iron-style aluminium (50% of the weight, same look) as a lower-cost alternative.
Typical Costs
| Item | Low (£) | High (£) | Notes |
|---|---|---|---|
| Cast iron gutter per metre | 45 | 85 | Half-round, ogee or moulded |
| Cast iron downpipe per metre | 40 | 80 | 2.5", 3" or 4" |
| Brackets, joints, outlets | 15 | 40 | Per fitting |
| Install labour, semi | 1,200 | 2,400 | 3–4 days, two specialists |
| Install labour, detached | 2,200 | 4,500 | 5–7 days |
| Cast-iron-effect aluminium | 25 | 45 | Per metre, 50% lighter |
| Scaffold hire | 400 | 1,500 | 3–5 days domestic |
How Long Does It Take?
Semi-detached: 3–4 days including paint touch-up. Detached or terraced: 5–7 days. Plus scaffolding time (typically 5 days) and painting (1–2 days per coat with drying time).
DIY or Professional?
Professional only. The weight and height make it dangerous, and getting the fall right on heavy cast iron requires experience. Listed-building work needs a contractor experienced in heritage rainwater systems.
Choosing the Right Tradesperson
Use a specialist heritage contractor. The big UK brands are Hargreaves Foundry, ARP Aluminium and Alumasc — ask which brand the contractor fits and whether the bolts are stainless or mild steel (stainless lasts much longer). Get the warranty in writing — 25 years on the cast iron, 10 years on paint is normal.
UK Regulations
Listed buildings require listed-building consent for any change in rainwater system. Conservation areas often require like-for-like cast-iron replacement. Approved Document Part H covers drainage capacity. Approved Document Part L doesn't apply to gutters. Rainwater must discharge into a soakaway or surface-water drain.
Common Problems
- Rust at joints: Worn paint or bedding compound lets rust into the joint. Repaint every 8–10 years and re-bed every 25 years.
- Bracket pull-out: Heavy cast iron pulls cheap fixings out of rotten fascia. Re-fix into solid timber.
- Frost cracks: Standing water freezes and cracks the cast iron. Clean gutters annually.
- Paint flaking: Wrong primer (especially modern emulsion direct to cast iron) flakes within months. Always use zinc-rich primer first.
Frequently Asked Questions
How long do cast iron gutters last?
80–120 years for the metal; paint needs refreshing every 8–10 years and bedding compound every 25 years.
Cast iron vs aluminium — which is better for heritage?
True cast iron is the heritage choice — required on most listed buildings. Cast-iron-effect aluminium (Hargreaves, Alumasc) is lighter, cheaper, won't rust, and looks identical from 4m+ away.
Can I paint cast iron gutters black?
Yes — black is the traditional UK colour. Use Hammerite Smooth or oil-based eggshell with zinc-rich primer underneath.
Do I need scaffolding for cast iron?
Yes — the weight makes ladder work unsafe. Scaffolding adds £400–£1,500 to the project but is non-negotiable for a heritage installer.
Will my insurance cover cast iron?
Yes — cast iron systems are insurable as buildings. Quote the higher rebuild cost to your insurer if you upgrade from uPVC.
How much heavier is cast iron than uPVC?
Cast iron is roughly 4× the weight per metre. A 6ft cast-iron half-round is 18 kg; the equivalent uPVC is 4 kg.
This guide was written with AI assistance and is intended for general information only. Prices are estimates based on UK averages and may vary by region. Always get at least three quotes and consult a qualified professional before starting any work.
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