Slate Roof Cost

Slate Roof Cost Calculator

How Much Does a New Slate Roof Cost?

The average cost of slate roof installation in the UK will be around £7,800. However, the price of a new slate roof will vary depending on various factors such as the size of your property, location, material costs, and the overall design of the roof.

It's usually cheaper to use a like-for-like replacement material for your new roof, but the premium appearance, durability, and increased lifespan of slate can make the additional investment worthwhile.

What type of property requires a new slate roof?

Terraced house

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Semi-detached house

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Detached house

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Bungalow/flat

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So, how much for a new slate roof?

The average slate roof cost per m², including installation, ranges from £58 to £150, depending on the slate type you choose and the complexity of your roof. See the breakdown by material below.

Slate Roof Cost by Material

The overall cost will also vary depending on roof size. Larger slate roofs often cost slightly less per m², while complex slate roofs with chimneys, dormers or difficult access usually cost more.

Slate Roof Prices

Let's look at some total roof slate prices for terraced, semi-detached, bungalow, and detached roofs, based on the typical property floor area for each, with bungalows usually costing more due to their single-storey footprint:

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Slate Roofer Costs and Timescales

Depending on the complexity of your slate roof project, your roofer's labour costs will range:

• Basic, straightforward installations will cost between £40 and £55 per m².
• Complex, steep pitched installations will cost between £60 and £75 per m².

You may be quoted a daily rate instead of a price per square metre. In 2026, a roofer's daily rate is between £200 and £275.

The location of your property will also influence your labour costs. You should expect higher slate roof prices in London and the surrounding areas compared to those in the north of the UK.

The bigger your property's roof, the longer the job will take:

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Additional Slate Roof Costs

Beyond the cost of the slate and labour, you may need to budget for the following.

• Scaffolding — £600 to £1,500, if this isn't already included in your quote.
• Skip Hire and Waste Disposal — £150 to £450.
• Structural Reinforcement — £1,000 to £3,000, if you're upgrading from a lighter material such as concrete tiles.
• Roof Insulation — £380 to £900 for a 20m² area, depending on the type of insulation.
• Gutter Replacement — around £650. If your gutters just need cleaning rather than replacing, that's a cheaper option worth checking first.
• Fascia and Soffit Capping — around £800.
• Ongoing Maintenance — £150 to £500 a year for cleaning and occasional repairs.
• Party Wall Agreement — £700 to £1,500, if roofing work affects a shared boundary with a semi-detached or terraced neighbour.

What Impacts Slate Roof Installation Costs?

Several factors affect what you'll pay for a slate roof, from the material and size of your roof to its design and where you live.

Type/Size of Slate Roof

Steeper roofs generally cost more to slate than shallower ones, as installers need extra support to lay the slates safely.

Slate Material

Your choice of slate has a big impact on cost. See the cost by material table above for a full comparison of natural, Spanish, fibre cement, concrete, metal, and composite options.

Roof Design and Complexity

Roofs with multiple angles, dormers, valleys, or chimneys take longer to slate and cost more than a simple, single-pitch design.

Roof Features

If your roof has solar panels or Velux windows, these will need removing and reinstalling during the work, which adds to the overall cost.

Ease of Access

Easier access keeps labour costs down. Difficult access, especially where scaffolding is required, can push costs up.

Location of Property

Labour costs tend to be higher in the south east of England than in the north, with rates often below average in Scotland and Northern Ireland.

What's Involved in Building a Slate Roof?

Fitting a slate roof is a skilled job best left to roofers, and working at height carries real risks. It's worth getting quotes from a few local roofers before you go ahead, with no obligation to hire.

Before the Job

• Preparing the Roof — If the roof is new or has been stripped back, the rafters must be checked to ensure there are no nails or protruding elements. This prevents damage to the breathable membrane during installation.
• Building Scaffolding — If required, this should be added before any work begins. This is particularly important for roofs that are high or difficult to access safely with a ladder.

During the Job

• Old Roof Removal — When replacing an existing roof, the first step is to remove the old roof covering before work on the new one can begin.
• Membrane and Battens Installation — The breathable membrane is rolled out, pulled taut, and nailed securely into position, and the first battens and tiles are positioned to calculate the exact number required.
• Slate Fixing — The first row of slate tiles is installed with the established overlap. The remaining rows are added in sequence, with tiles secured using suitable fasteners or nails.

After the Job

• Final Clean-Up — Once everything is safe and firmly in position, the clean-up can begin. Any debris is removed from the site.
• Scaffold Removal — If scaffolding has been used, it can then be disassembled and taken away, leaving the finished slate roof in place.

Signs Your Slate Roof Needs Replacing

If you're not sure whether your roof needs a repair or a full replacement, look out for these signs.

• Multiple slipped, cracked, or missing slates.
• Nail decay, causing slates to work loose.
• A sagging roofline or visible dips.
• Damp patches or leaks inside the property.
• Slates that flake, delaminate, or feel soft to the touch.
• A roof approaching, or older than, 70 to 100 years old.

A local roofer can inspect your roof and advise whether a repair or a full replacement makes more sense for your budget.

Types of Slate Roofing Materials

We'll now take a closer look at the various types of slate roof materials, including a breakdown of their pros and cons and estimated costs.

Natural Slate Roof Cost

• Cost — £60 to £75 per m² (material only).
• Best for: period and heritage properties, and homeowners prioritising longevity.

A sturdy and long-lasting option, natural slate consists of grains of quartz, mica, and chlorite, and may last for a century or more if well maintained.

Pros

• ✔ Can last for 100+ years if well-maintained.
• ✔ Low maintenance, with fire, moisture, and pest resistance.

Cons

• ✖ High cost when compared to other slate roof tiles.
• ✖ Heavy, sometimes requiring additional roof support, and can be tricky to install.

Fibre Cement Slate

• Cost — £22 to £30 per m² (material only).
• Best for: budget-conscious homeowners who want the look of slate.

Fibre cement slate consists of sand, cellulose fibres, and cement. It stopped including asbestos after the 1980s, once the health risks became clear.

Pros

• ✔ Affordable compared to natural slate roof tiles.
• ✔ Lightweight, and easier to install than natural slate.

Cons

• ✖ Less durable than natural slate, with an average lifespan of 20 to 25 years.
• ✖ Can be more expensive to maintain than natural slate if they become damaged.
• ✖ May require repainting over time, depending on exposure to the elements.

Concrete Slate Roof Costs

• Cost — £18 to £25 per m² (material only).
• Best for: homeowners wanting a durable, low-cost slate alternative.

Concrete slates are made from cement, sand, water, and oxide, and can last around 50 years or more if properly maintained.

Pros

• ✔ Budget-friendly slate option.
• ✔ Durable, lasting around 50 years if well-maintained.

Cons

• ✖ Susceptible to cracking in harsh weather.
• ✖ Heavier than other slate tiles, may need structural reinforcement.

Metal Slate Roof Costs

• Cost — £30 to £50 per m² (material only).
• Best for: homeowners who want a lighter roof and a quicker install.

Metal slate is designed to look like real slate but offers a lighter and typically easier to install alternative.

Pros

• ✔ Lightweight and reduces the need for structural reinforcement.
• ✔ Durable and doesn't crack like natural slate.
• ✔ Typically faster to install than natural slate.

Cons

• ✖ Premium options can be expensive.
• ✖ Has a less authentic appearance than natural slate.
• ✖ Can be noisier in heavy rain.

Composite Synthetic Slate Cost

• Cost — £25 to £45 per m² (material only).
• Best for: those who want the appearance of slate without the weight or price.

Composite synthetic slates are made from recycled plastics, rubber, or polymer blends, giving the appearance of natural slate at a reduced cost and weight.

Pros

• ✔ Lightweight and easier to install.
• ✔ A more affordable alternative to natural slate.
• ✔ Durable and more resistant to fading and damage.

Cons

• ✖ Doesn't last as long as natural slate.
• ✖ Can appear 'artificial' on close inspection.
• ✖ Quality can vary across available brands and products.

Slate Roof Cost vs Other Roofing Materials

Slate is generally more expensive to buy than clay or concrete tiles, but it can last far longer with less maintenance. Here's how the material costs compare.

For a full breakdown of tile replacement and repair pricing, see our roof tile replacement cost guide. For installed cost by slate type, see the cost by material table above.

Slate Roof Repair Costs

If your slate roof only has isolated damage, a repair is often more cost-effective than a full replacement. Typical costs include:

• Fixing 3 slipped slates: £150 to £220.
• Replacing 5 slate tiles: £225 to £260.
• Minor leak repair: £150 to £400.
• Lead flashing repair or replacement: £250 to £700.

For a fuller breakdown of repair and maintenance pricing, see our roof repair cost guide.

How Many Slates Do You Need?

The number of slates you need depends on your roof size, the slate size, and the overlap (headlap) used. Natural slate typically needs 13 to 30 tiles per m², depending on the size of slate used, as larger slates need fewer per m². As a guide, a standard 500mm x 250mm slate, the most common size in the UK, needs around 20 per m².

Composite and fibre cement slates are usually a larger format, closer in scale to interlocking concrete tiles, so you'll typically need fewer per m², around 10 to 15. The exact number can also vary based on your roof's pitch, layout, and the amount of waste allowed for cuts around chimneys, valleys, and edges.

How to Lower Slate Roof Costs

• Get at least three quotes from local roofers to compare pricing.
• Consider composite or fibre cement slate instead of natural slate.
• Schedule work outside of peak season, when roofers may have more availability.
• Ask whether existing slates can be reused for a repair rather than a full replacement.
• Combine other jobs, such as gutter or fascia work, with your roofing project while scaffolding is already up.
• Keep on top of maintenance to avoid costly repairs further down the line.

Checklist: Hiring Contractors to Install a Slate Roof in the UK

Before hiring a professional to fit a slate roof, there are various tips worth taking on board:

• Are they part of the NFRC Competent Person Scheme? Registered members can self-certify that your roofing project meets building regulations. Using an experienced roofer with this accreditation can save time and reduce additional costs.
• Do they have evidence of positive feedback? Check online ratings and reviews on websites such as MyJobQuote to see what previous customers have said about their workmanship and reliability.
• Have you seen examples of their work? Look through photographs or videos of previous projects to get a clearer idea of the quality of work you can expect.
• Are they covered by insurance? While not a legal requirement, most reputable tradesmen will carry Public Liability Insurance to cover accidental damage or personal injury.
• Have you received multiple quotes? It's wise to obtain at least three quotes so you can compare pricing and the scope of work, which can be requested via MyJobQuote with no obligation.
• Does the work come with a guarantee? Any trustworthy company should stand by their work, so always ask for written confirmation of guarantees or warranties outlining exactly what's covered once the job is complete.

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