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Restore cast-iron radiators.
Strip-and-spray, leak test, period valves — true heritage radiator restoration.
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Untested salvage leaks
Original Victorian radiators can have hairline cracks. Always pressure-test before fitting.
Wrong sizing
Cast iron heats slower but holds heat. Sizing should still meet room BTU requirement. Online calculators from Castrads, Carron.
Wall structure inadequate
Heavy radiators pull plasterboard fixings out. Need solid masonry or substantial wall.
Wrong valves for finish
Cheap chrome valves on heritage radiator ruin look. Always specify matching finish.
Costs & timeline
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Indicative UK ranges and what affects price.
Cost range
By job type
Inc. VAT · 2026
Source: NMT quotes
Source: NMT quotes
New cast iron 3-column 600mmCastrads, Carron
£250–£500
New cast iron 4-column 800mmHigher output
£400–£800
Heritage decorative 4-columnOrnate design
£500–£1.2k
Salvage cast iron (cleaned & tested)Per radiator from reclamation
£200–£800
Restored Victorian originalSandblasted, refinished, tested
£500–£1.5k
Period valves (per pair)Polished, brass, satin
£60–£250
!
Quote spread is typically ± 18% — always get 3 quotes.
At a glance
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Cast iron radiators add Victorian or Edwardian character — heavy, decorative, and slow-to-cool. Expect to pay £300–£1,500 per radiator in the UK for new or restored cast iron. Salvage from architectural reclamation yards available too.
What Does the Work Involve?
Cast iron radiators are heavy (40–80 kg). Two-person lift. Wall-mounted or floor-standing. Brackets must be fixed to solid masonry or robustly fixed plasterboard. Pipework typically chrome or brass to match radiator. Each radiator has a separate valve set (matching finish — antique brass, polished, satin nickel). System filled, vented, balanced. Heritage radiators work fine with modern boilers and even heat pumps.
Typical Costs
| Item | Low (£) | High (£) | Notes |
|---|---|---|---|
| New cast iron 3-column 600mm | 250 | 500 | Castrads, Carron |
| New cast iron 4-column 800mm | 400 | 800 | Higher output |
| Heritage decorative 4-column | 500 | 1,200 | Ornate design |
| Salvage cast iron (cleaned & tested) | 200 | 800 | Per radiator from reclamation |
| Restored Victorian original | 500 | 1,500 | Sandblasted, refinished, tested |
| Period valves (per pair) | 60 | 250 | Polished, brass, satin |
| Install labour (cast iron) | 150 | 350 | Heavy work, two-person |
How Long Does It Take?
Like-for-like cast iron radiator install: 3–4 hours. With new pipework: 5–7 hours. Heritage radiator install via salvage: 1 day per radiator if testing/refurbishment needed.
DIY or Professional?
Professional. The weight requires two people. Plumbing pipework needs sound joints. Salvage radiators need pressure testing before commissioning.
Choosing the Right Tradesperson
Plumber with heritage experience. For salvage radiators, use specialist refurbisher (Castrads, Carron, UK Architectural Heritage). They test, clean, and provide warranty.
UK Regulations
Standard plumbing regulations. Listed buildings may require period-correct radiators.
Common Problems
- Untested salvage leaks: Original Victorian radiators can have hairline cracks. Always pressure-test before fitting.
- Wrong sizing: Cast iron heats slower but holds heat. Sizing should still meet room BTU requirement. Online calculators from Castrads, Carron.
- Wall structure inadequate: Heavy radiators pull plasterboard fixings out. Need solid masonry or substantial wall.
- Wrong valves for finish: Cheap chrome valves on heritage radiator ruin look. Always specify matching finish.
Frequently Asked Questions
New, restored, or salvage cast iron?
New (Castrads, Carron): consistent quality, warranty. Restored: heritage character with reliable testing. Salvage: cheapest but variable quality, risk of leaks.
Will cast iron work with modern boiler?
Yes — same hydraulic system. Cast iron has higher water content so slower to heat but provides residual warmth longer.
Cast iron with heat pump?
Yes — but the larger water content suits lower flow temperatures of heat pumps. Often the best radiator type for heat pump conversion.
How heavy is a cast iron radiator?
3-column 600mm: 25–35 kg. 4-column 800mm: 40–55 kg. Larger: 60–80 kg. Two-person lift always.
Are heritage radiators efficient?
Same efficiency as modern steel — convection and radiation are similar. Visual heat from cast iron is appealing but doesn't change efficiency.
Where to source UK cast iron?
New: Castrads (Manchester), Carron Cast Iron (Scotland). Restored salvage: UK Architectural Heritage, Eras Architectural, local reclamation yards.
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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