A slate roof is an excellent choice for a new roof due to its durability, visual aesthetics and low effort to maintain it over its lifespan.
Real slate can add bundles of character to your property. But as with all materials of high-quality, slate can be on the pricier side. It’s worth balancing that against its long lifespan, which means you can expect it to pay for itself in due course.
This article will cover the sorts of costs you can expect to pay for a flat roof as well as other factors which may affect the price of flat roofs.
Cost Per m²
We worked with a professional quantity surveyor to price up a slate roof.
|Item||Labour Cost per m²||Material Cost per m²||Total Cost per m²|
|Battens (nails included)||£5||£4||£8|
|Counter Battens (nails included)||£5||£4||£8|
Slate material costs can range from £44 – £79 per m², meaning that the total average can range from £93 – £128 per m² in total.
Factors That Affect the Cost
- Size of roof – these works are specialist and rates can sometimes be higher on smaller domestic projects. Generally, slate isn’t used for larger buildings as these will tend to have flat roof type structures.
- Pitch of roof – sometimes a particularly steep roof could add the cost due to supports being required for the roofers working to lay the slates.
- Specifications of slate – generally imported slate will be cheaper compared to local slate such as Welsh slate. Brazil and Chinese slate are common cheaper varieties.
- Structure of the roof covering – whether plywood sheathing needs to be used or if existing membrane and battens can be re-used etc.
- Roof access – is the roof accessible and safe with ladders or is scaffolding required? This can add to cost.
- Extra flashings – flashings are generally used around chimneys or at junctions with walls. For example, if you build a single storey side extension to a house you will run a flashing along where it joins into the wall. Expect to pay an extra £38 per metre on roof areas where flashing is required.
- Extra hip tiles – hip tiles are going to be used if the roof is designed as a hip roof. Expect to pay an £45 per metre where hip tiles are used.
- Extra plywood – plywood is often used where load strengthening is required, e.g. areas of the north of the UK that get snow in winter or lots of rain, wind etc. This will be roughly an extra £26/m².
- Location – Areas in the south of England and London will be higher than in other parts of the country. The prices quoted in the table above apply for the South East or Outer London area. The adjustments below can be used to calculate costs in your area.
Region % Adjustment
South East (Southampton, Oxford, Kent, Outer London) 0
Inner London +4%
South West (Bristol, Exeter) -4%
West Midlands (Birmingham) -10%
East Midlands (Northampton, Nottingham, Leicester) -10%
East Anglia (Cambridge, Norwich, Ipswich) -5%
North West (Liverpool, Manchester) -12%
Yorkshire and Humberside (Leeds, Sheffield) -11%
North East (Newcastle, Sunderland) -10%
Scotland (Edinburgh, Glasgow) -6%
Wales (Cardiff, Swansea) -9%
Northern Ireland (Belfast) -12%
Types of Roof Slate
These originate in quarries across Europe, Africa, Asia and America. Different quarries have their own stone type, leading to various colours and shapes.
Spanish slate is typically sourced in northwestern Spain. These regions contain quarries with some of the best slates in the world.
Spanish slate density is larger than other roofing types, which helps regulate property temperatures. It is a more expensive slate but slightly cheaper than Welsh slate.
Spanish slate is one of the most well-known and most used slates on the market.
North Wales has a history of producing high-quality slate. Because of this, it is one of the most expensive slates, but has fantastic visual appear. Local quarries have been considered for UNESCO status.
Brazil slate is also widely used across the world. Their slate is created using mudstone and is cheaper than other types of natural slate. However, it still contains durable qualities similar to other slates.
Man-Made Slate (Fibre Cement Slate)
Man-made slates are becoming more popular because they are generally cheaper than natural slate. They are also more eco-friendly as materials don’t need to be extracted from natural habitats. Almost all man-made slate is made from fibre cement.
Get Pricing on Slate Roofing Near You
We’ve done our best to give you a good idea of what you can expect to pay for a slate roof.
However, our guides are not a substitute for a fixed quote specifically for you.
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