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Install cement fibre slate.
Synthetic slate — Marley Eternit or Tapco SlateLine. Lighter than natural slate, lower cost.
✓ Updated May 2026✓ Free quotes✓ Vetted pros
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Costs, timelines, pitfalls and the right questions to ask before any roofer starts on cement Fibre Slate (Synthetic).
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Itemised quotes from up to 3 local roofers on cement Fibre Slate (Synthetic) — so you can compare like-for-like, not lump sums.
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Cracking from impact
Cement fibre is more brittle than natural slate. Falling debris (tree branches, dropped tools) cracks easily.
Colour fade
Pigmented cement fibre fades over 25–30 years. Less noticeable on dark colours.
Frost damage
Cheap variants delaminate in UK frost cycles. Buy brand-name (Cembrit, Marley Eternit).
Conservation rejection
Some conservation officers reject cement fibre even where existing roof has it.
Costs & timeline
Know what it costs. Know when it ends.
Indicative UK ranges and a typical week-by-week schedule.
Cost range
By job type
Inc. VAT · 2026
Source: NMT quotes
Source: NMT quotes
Cembrit cement fibre slate per m²Material only
£30–£55/m²
Marley Eternit cement fibre per m²Premium
£35–£60/m²
Install labour per m²Same as natural slate
£20–£50/m²
Terraced re-roof (cement fibre)50–70 m²
£5.5k–£10.5k
Semi-detached re-roof80–120 m²
£8.5k–£16.5k
Natural slate equivalent (reference)For comparison
£14k–£30k
!
Quote spread is typically ± 18% — always get 3 quotes.
Timeline
Semi-detached full re-roof · week by week
Typical
4 phases · 3 wk
4 phases · 3 wk
W1
W2
W3
Scaffold erection
Strip + felt + battens
Tile + ridge + verge
Flashings + snags
!
Schedule slips on dependencies — pad each phase by 10–20% for real-world delays.
At a glance
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Roofer explained
Cement fibre slate (Cembrit, Marley Eternit, Marley Modern) gives the look of natural slate at a fraction of the cost. Lasts 30–60 years vs 100+ for real slate. Expect to pay £50–£110 per m² fitted in the UK.
What Does the Work Involve?
Cement fibre slates are factory-made from cement, fibre reinforcement, and pigment. Sold in standard slate sizes and grades. Install method same as natural slate — copper or stainless nails through pre-drilled holes, head laps for waterproofing. Lighter than concrete tile, similar weight to natural slate.
Typical Costs
| Item | Low (£) | High (£) | Notes |
|---|---|---|---|
| Cembrit cement fibre slate per m² | 30 | 55 | Material only |
| Marley Eternit cement fibre per m² | 35 | 60 | Premium |
| Install labour per m² | 20 | 50 | Same as natural slate |
| Terraced re-roof (cement fibre) | 5,500 | 10,500 | 50–70 m² |
| Semi-detached re-roof | 8,500 | 16,500 | 80–120 m² |
| Natural slate equivalent (reference) | 14,000 | 30,000 | For comparison |
How Long Does It Take?
Same as natural slate — 7–10 days for terraced, 10–14 days for semi.
DIY or Professional?
Professional only — same as natural slate.
Choosing the Right Tradesperson
NFRC member familiar with cement fibre slates. Confirm brand and grade — Cembrit's range varies in durability and aesthetic. Get 25-year material warranty.
UK Regulations
Listed buildings: usually NOT accepted (natural slate required). Conservation areas: often accepted if existing roof has cement fibre. Building Regs Part L thermal upgrade applies.
Common Problems
- Cracking from impact: Cement fibre is more brittle than natural slate. Falling debris (tree branches, dropped tools) cracks easily.
- Colour fade: Pigmented cement fibre fades over 25–30 years. Less noticeable on dark colours.
- Frost damage: Cheap variants delaminate in UK frost cycles. Buy brand-name (Cembrit, Marley Eternit).
- Conservation rejection: Some conservation officers reject cement fibre even where existing roof has it.
Frequently Asked Questions
Cement fibre or natural slate?
Cement fibre: half the cost, 30–60 year life, accepted in most modern installations. Natural slate: longest life (80–150 years), heritage standard, listed-building requirement.
Will cement fibre look like real slate?
Indistinguishable from ground level (4m+ viewing). Up close the texture is more uniform than natural slate. Most homeowners and casual observers cannot tell.
Best brand of cement fibre?
Cembrit (Danish, market leader), Marley Eternit (UK), Tegral (Irish). All similar quality and price.
How long does cement fibre last?
30–60 years for the slate. Mortar bedding/dry-fix fittings may need attention at 30 years.
Can I use cement fibre on a listed building?
Almost never. Listed buildings require like-for-like natural slate. Conservation areas may accept on existing matching roofs.
What's the visual difference from natural slate?
Cement fibre is more uniform — less natural variation in size, colour, texture. Heritage buildings benefit from natural variation. Modern builds suit uniformity.
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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