Thrutone Fibre Cement Roof Slate

Smooth surface and square cut edges


*excludes Ireland

A smooth surface and square cut edges give a low profile slate at an economical price, particularly suitable to complex roof geometries down to 15°. This market leading light weight roof slate is now available in five new colours and three shapes providing even more design flexibility.  With its low wastage and ease of installation, it's easy to see why it is the product of choice for all types of new build and refurbishment projects. 

Used on a variety of applications, Thrutones provide the flexibility to create inspirational roofs and facades, examples include Canon Popham School in Sheffield and the stunning curved roof of the Cavell Centre in Peterborough.

If you would like to find out more about our truly complete roof system, underwritten by a 15 year warranty, please click here.

Click on a colour to view a larger version and to select a sample

Size of Tile

600mm x 300mm

500mm x 250mm

Minimum Pitch

600mm x 300mm

      500mm x 250mm

Minimum pitch (100mm lap)
Moderate exposure 22.5°
Severe exposure 25°

      Minimum pitch (100mm lap)
      Moderate exposure 22.5°
      Severe exposure 25°

Minimum pitch (110mm lap)
Moderate exposure 20°
Severe exposure 22.5°

      Minimum pitch (110mm lap)
      Moderate exposure 22.5°
      Severe exposure 25°

Low pitch application
Minimum pitch (110mm lap)
15° - 17.5° @ 4m max. rafter length

17.5° - 20° @ 6m max. rafter length

Thrutone shapes
Full roof 35° minimum pitch


Maximum Pitch


Minimum Headlap

600mm x 300mm

500mm x 250mm

100mm, 110mm


Maximum Gauge

600mm x 300mm             

      500mm x 250mm

Covering Capacity

Net slates/m²

600mm x 300mm             
100mm lap 13.4
110mm lap 13.6

      500mm x 250mm
      100mm lap 20.0

Weight of Tiling²

600mm x 300mm

100mm lap 20.4 (0.20kN/m²)

110mm lap 20.9 (0.20kN/m²)

    500mm x 250mm
    100mm lap 21.3 (0.21kN/m²)

Battens Required

(net lin.m/m²)

600mm x 300mm             
100mm lap 4.00
110mm lap 4.08

      500mm x 250mm
      100mm lap 5.00

Batten Size Recommended

38 x 25 mm for rafters / supports not exceeding 450mm centres

50 x 25mm for rafters / supports not exceeding 600mm centres

Tile Nails

Slate nails (Copper to BS1202-2) 30mm x 2.65mm

Copper disc rivets


Authority BS EN 492

Please click here for further information on batch codes and special considerations

Need a complete roof system? We’ve got you covered. Welcome to the most comprehensive roof system on the market. At Marley Eternit, we’ve pulled together all the elements you need to specify high-performance roofs for any type of scheme into one advanced solution. So now you can source everything – from the battens and underlay, through to the roof covering, components and fixings.

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Country of Production


Environmental Management


Quality Management


Health and Safety Management


LCA study

Can achieve an A+ rating in the BRE Green Guide to Specification


Manufactured under high pressure and air cured

Raw materials

Cement, silica, fibres, pigments and fillers


> 60 years


Fibre cement is a 100% recyclable building material

Embodied Carbon Rates


Measurement metric No per sq m  Headlap / gauge M₂ conversion
KgCO₂e 20 100mm 14



Measurement metric No per sq m  Headlap / gauge M₂ conversion
KgCO₂e 13.4/13.6 100mm/110mm 13
Here at Marley Eternit, we are always on hand to offer practical and experienced support. Whether you have a query, are unable to find what you are looking for or would like to report an issue, drop your details below and we will be in touch.
Please note: we are unable to accept sample requests through this form.