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Metal Roof Cost Calculator (UK)

Calculate metal roof cost in GBP across standing-seam, profiled steel, aluminium, zinc, and copper. Low/mid/high quote ranges with NFRC 2026 contractor data, BS 5534 compliant.

Metal Roof Cost Calculator

Get a side-by-side installed cost for every metal panel system on the same job — with low / mid / high pricing ranges, full line-item breakdown, and cost-per-year over service life. Pricing matched to your locale's currency and contractor rates.

Cheapest metal option
£17,154
Corrugated steel
£93/m² · 35 yr life
Best lifetime value
£448/yr
Ribbed (R-panel)
£17,901 upfront · 40 yr life
Panel systemLowMidHigh/ m²Per yr
Corrugated steel (35 yr)£15,096£17,154£20,242£93£490
Ribbed (R-panel) (40 yr)£15,753£17,901£21,123£97£448
Metal shingle (45 yr)£22,366£25,416£29,991£137£565
Stone-coated steel (50 yr)£23,778£27,021£31,884£146£540
Steel standing-seam (50 yr)£24,739£28,112£33,173£152£562
Aluminium standing-seam (55 yr)£27,697£31,474£37,140£170£572
Zinc standing-seam (90 yr)£36,760£41,773£49,292£226£464
Copper standing-seam (120 yr)£52,049£59,146£69,793£320£493

Mid-range cost breakdown — Corrugated steel

  • Panels + finish: £4,919
  • Trim, ridge cap, flashing: £492
  • Underlayment + ice/water shield: £1,703
  • Fasteners + clips: £341
  • Labour: £5,865
  • Tear-off: £2,252
  • Disposal: £1,165
  • Permit + overhead: £418

NFRC 2026 metal roofing rate guide, Checkatrade 2026 contractor pricing. Estimate excludes structural reinforcement, snow guards, gutter replacement, and complex flashings (chimneys, skylights). Add a 5–10% contingency for cuts, valleys, and waste on hipped roofs. Low / High columns reflect typical contractor quote spread.

What this metal roof cost calculator estimates

This calculator quotes the installed cost of every metal roofing system on the same job — low, mid, and high price ranges in GBP — so you can size a realistic budget before getting quotes from NFRC-registered contractors. Pricing reflects NFRC 2026 contractor rate data, Tata Steel and Rheinzink list prices, Checkatrade 2026 quote spreads, and BS 5534 compliance overhead.

The output covers eight metal systems used in UK residential and light commercial:

  1. Pre-painted steel standing-seam (Tata Colorcoat HPS200, Kingspan Trapezoidal) — 35-year life
  2. Corrugated steel sheet (galvanised + colour-coated) — 30-year life
  3. Box-profile / trapezoidal ribbed (typical agricultural and extension) — 35-year life
  4. Metal tile / pressed-shake (Decra, Britmet) — 40-year life
  5. Stone-coated steel (Britmet Pantile, Metrotile) — 50-year life
  6. Aluminium standing-seam (coastal, marine zones) — 60-year life
  7. Titanium-zinc standing-seam (Rheinzink, VMZinc, NedZink) — 80-year life
  8. Copper standing-seam (KME, Aurubis) — 120-year life

Each row breaks out panels, labour, trim/flashings, breather membrane, fasteners, strip-out, disposal, and any decking replacement. The low and high columns reflect the 12–18% spread you’ll see between three NFRC-registered contractor quotes in the same postcode.

How metal roof cost is built up under BS 5534

UK installed cost on metal roofs has six line items. Skip any one and your quote is wrong by 8–15%.

Panels and finish — pre-painted steel runs £18–£32/m² at the merchant in 0.5–0.7 mm coil; titanium-zinc £55–£85/m²; copper £110–£160/m². The calculator scales by 0.5/0.6/0.7 mm gauge multiplier (heavier gauge is mandatory for spans over 1.5 m and Wind Zones 3–4 per BS EN 1991-1-4).

Trim, ridge, flashings — typically 8–12% of panel cost on simple gable; 15–20% on hipped or dormered. Includes ridge cap, drip-edge, gable abutment, valley flashing, and lead step-flashing where the roof meets vertical brickwork.

Breather membrane + separating layer — Type LR membrane (Klober Permo Air, Glidevale Protect VP400) at £4–£6/m² and structured PE separating layer (Delta-Trela) at £8–£12/m² under standing-seam. Total underlayment typically £12–£18/m² installed.

Fasteners and clips — exposed-fix profiled sheet uses 6–8 self-drilling fasteners per m²; standing-seam uses 4–6 hidden clips per m². Budget £2–£4/m² in fasteners alone.

Labour — NFRC 2026 day rates: £280–£380/day for profiled-steel installers, £450–£600/day for zinc/copper specialists. Pitch matters: a 45° roof costs 32% more in labour than a 22° roof because of scaffolding, fall arrest, and slower production. Crown-of-Thorns or unusual roof shapes add 25–40%.

Strip-out + disposal — £18–£28/m² for one layer of concrete or clay tile; £35–£50/m² for two layers or slate. Skip hire and waste-transfer notes typically £350–£600 per skip in London, £200–£380 nationally.

Decking/battens replacement — softwood batten at 25 × 50 mm graded to BS 5534 at £4–£6/m² material + £6–£8/m² labour. Timber decking (18 mm OSB3 or 18 mm WBP ply) at £14–£18/m² where existing battens are over 30 years old or where the build-up is being changed from cold-roof to warm-roof.

Scaffolding + permit — typically £1,200–£3,500 for a semi-detached, £2,500–£5,000 for a detached. Scaffolding alone runs 8–12% of the job.

Cost ranges by metal system (UK, 185 m² semi-detached)

For a typical 1930s 3-bed semi-detached re-roof, 35° pitch, mid-region (e.g. West Midlands), with strip-out:

SystemLowMidHighPer yr
Profiled steel (HPS200)£8,500£10,000£11,800£286
Box-profile / trapezoidal£9,800£11,500£13,500£329
Metal tile (Decra/Britmet)£14,500£17,000£20,000£425
Pre-painted steel standing-seam£15,500£18,000£21,500£514
Stone-coated steel£18,500£21,500£25,500£430
Aluminium standing-seam£21,000£24,500£29,000£408
Titanium-zinc standing-seam£32,000£37,500£44,000£469
Copper standing-seam£49,000£58,000£68,000£483

These are NFRC 2026 mid-region figures. London and South-East run 18–25% above; Scotland and Wales run 8–15% below; Northern Ireland often runs 5–12% below national mid because of cross-border supply.

Region effects on UK metal roof cost

  • London + South-East — labour day rates £450–£550, scaffolding £40–£70/m² (vs. £25–£40 nationally), waste-transfer £55–£80/skip premium. Adds 18–25% to the total.
  • Scotland — high-wind exposure (Wind Zone 4) requires 0.7 mm minimum coil and Class A2 fasteners; modest 8–12% material premium offset by 10–15% lower labour rates than England average.
  • Coastal exposure (Cornwall, Norfolk, west Wales) — aluminium or zinc preferred over steel for marine corrosion; sacrificial-coating warranty on pre-painted steel often voids within 3 km of saltwater.
  • Listed buildings + conservation areas — natural slate or clay tile usually mandated; metal almost never approved on principal elevations.
  • Farmhouse / agricultural permitted development — box-profile and corrugated 25–35% cheaper than residential equivalent because of relaxed BS 5534 enforcement and standard agricultural lap details.

Comparing metal vs. tile over 60 years (UK)

For a typical 185 m² semi over 60 years at 2026 NFRC pricing:

  • Concrete interlocking tile (Marley Modern, Redland Mini-Stonewold): £8,000 every 50 years = ~£9,600 over 60 years
  • Pre-painted steel standing-seam: £18,000 + minor maintenance = ~£21,000 over 60 years
  • Titanium-zinc standing-seam: £37,500 once = £37,500 over 60 years

Concrete tile remains the cost-leader at scale. Metal makes economic sense when:

  • The existing pitch is below 17.5° (concrete tile minimum per BS 5534 Annex C) — you can’t legally re-tile
  • The existing structure can’t take the dead load of clay or concrete (60–75 kg/m² vs. 7–12 kg/m² for steel)
  • Architectural intent — standing-seam zinc and copper drive a 5–12% uplift in marketed sale price on contemporary new-builds
  • Marine exposure — zinc and aluminium outlast clay-glaze in salt-spray testing

For a like-for-like Victorian or Edwardian re-roof, slate or clay typically wins. For a flat-roof extension, low-pitch dormer, or modern architect-designed project, metal is the right call.

What this calculator excludes

Add line items for:

  • Scaffolding — £1,200–£5,000 on a UK domestic re-roof; almost never included in m² rates
  • Lead-detail flashings — £35–£55 per linear metre on chimneys, parapets, abutments
  • Roof window replacement — £450–£1,200 per Velux/Fakro if existing units are over 20 years old
  • Insulation upgrade — £25–£45/m² for 150 mm PIR if changing cold-roof to warm-roof
  • Soffit and fascia — £18–£32 per linear metre uPVC; £45–£75 per linear metre painted timber
  • Building control fees — £450–£950 typical; competent-person scheme self-cert avoids this for pure re-roof

For panel takeoff and m² sizing, see our metal roof calculator. For an all-materials comparison including concrete tile, clay tile, and slate, see the roofing cost calculator. For a full extension or replacement budget, use the roof replacement cost calculator.

Sources

NFRC Technical Bulletin TB18 (Metal Roofing); BS 5534:2014+A2:2018 Slating and Tiling; BS EN 1991-1-4 Wind Actions; Approved Document A (Structure), L (Conservation of fuel and power), C (Site preparation and resistance to contaminants); Tata Steel Colorcoat HPS200 Ultra technical guide; Rheinzink and VMZinc UK published list pricing 2026; Britmet, Decra, Metrotile published distributor pricing; Checkatrade 2026 average quote data; MyBuilder 2026 trade rate guide; BBA Agrément certificates 13/4995, 14/5126.

Frequently asked questions

How much does a metal roof cost in the UK in 2026?
For a typical 185 m² semi-detached gable in the UK: profiled steel sheet (Tata Colorcoat HPS200) runs £8,500–£11,500 installed (£46–£62/m²), exposed-fix box-profile runs £10,000–£13,500 (£54–£73/m²), zinc-coated steel standing-seam runs £18,000–£24,000 (£97–£130/m²), and natural Rheinzink or VMZinc standing-seam runs £28,000–£38,000 (£151–£205/m²). Copper standing-seam climbs to £42,000–£58,000 (£227–£313/m²). NFRC 2026 contractor data confirms these ranges — London and South-East run 18–25% above national mid.
Why is zinc and copper standing-seam so much more expensive than steel?
Three drivers: substrate, labour skill, and warranty. Titanium-zinc (Rheinzink, VMZinc, NedZink) costs roughly 2.5–3× pre-painted steel at the merchant. Copper costs 4–5× steel and is volatile on the LME. Both metals require trained zinc/copper roofers — the City & Guilds 6219 zinc qualification is held by perhaps 800 UK installers, so labour day rates run £450–£600 vs. £280–£380 for profiled-steel installers. The trade-off: zinc carries 60–80 year service life, copper 100+ years, vs. 30–40 for pre-painted steel.
Is a metal roof worth it over concrete or clay tiles in the UK?
On most pitched UK domestic roofs (35°+), interlocking concrete tile at £40–£65/m² installed is the cost-leader and meets BS 5534 wind-uplift comfortably. Metal makes sense in three cases: low-pitch extensions (3–14° where tile cannot go), heritage or architect-designed projects where standing-seam aesthetics drive the spec, and coastal exposure where zinc or aluminium beat tile on lifecycle. For a standard 1930s semi re-roof, concrete tile typically wins on pure cost; metal wins on appearance and longevity. Single-storey rear extensions are the big metal-roof market.
Do I need building regs approval for a metal roof in the UK?
A like-for-like re-roof is generally permitted development under Class C (House) of the General Permitted Development Order, but the works are notifiable to building control under Approved Document L (heat loss) — your contractor must self-certify with a competent-person scheme (FENSA, NAPIT) or you submit a building notice. A change of cladding type (e.g. concrete tile to standing-seam zinc) increases the structural and thermal calc burden — Approved Document A and L apply. In conservation areas and on listed buildings, planning permission is required and most LPAs reject metal on Victorian terraces.
What underlay and ventilation does a metal roof need under BS 5534?
BS 5534:2014+A2:2018 requires a Type LR (low-resistance) breather membrane on cold-roof construction (e.g. Klober Permo Air, Glidevale Protect VP400) and a separating layer beneath metal — typically a structured polyethylene (Delta-Trela) or self-adhesive bitumen sheet — to prevent condensate corrosion and dampen rain noise. Cold-roof ventilation: 25 mm continuous air gap from eave to ridge, 10 mm eave vent, 5 mm ridge vent. Warm-roof: VCL (vapour control layer) on the warm side of insulation, no separating layer needed on standing-seam.
What's the cheapest metal roof for a UK extension?
For a flat or low-pitch (3–14°) extension under 25 m², the cost order is: profiled steel sheet (Tata Greencoat) £40–£55/m² installed, single-skin box-profile with 100 mm PIR £65–£90/m², GRP (fibreglass) at £90–£120/m² isn't metal but competes on price. For a pitched extension (15°+), pre-painted steel standing-seam in 0.5 mm coil at £85–£120/m² installed beats profiled sheet on appearance and isn't much more expensive. Avoid budget Chinese-import box-profile under £35/m² — colour fades within 8 years and the warranty is unenforceable.
Can I install a metal roof on a flat conservatory or garage?
Yes, and metal beats traditional felt + chippings on lifecycle. Standing-seam zinc on a 5° fall handles UK rainfall easily and lasts 60+ years vs. 15 for three-layer felt. Box-profile sheet is acceptable for garages and outbuildings on 5°+ pitch (lap-sealed) but not for habitable conservatories due to noise. For habitable warm-roof conservatories, single-ply membrane (TPO/EPDM) at £80–£130/m² installed is usually a better choice than metal — quieter and more forgiving on detail.

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