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The Cedral Thrutone Smooth Cement Fibre Slates are a low-profile fibre cement slate that features a smooth surface and square cut edges for a sleek, aesthetically pleasing finish.


These cement fibre slates are particularly suitable to complex roof geometries. They are one of the strongest slates on the market and are popular with architects and roofers.


Thrutone slates provide complete design flexibility. With its low wastage and ease of installation, it's easy to see why it is the slate of choice for all types of new build and refurbishment projects.


Used on a variety of applications, Thrutone slates provide the flexibility to create inspirational roofs and facades.



Cedral Thrutone Smooth Cement Fibre Slates

Colour: Blue Black
    • A+ Green guide rating
    • Can achieve a BES 6001 'Very Good' rating
    • Environmental product declaration available
    • Can be used for both roof and facade
    • Fibre cement is a recyclable building material
    • Low maintenance
    • Low carbon footprint of 16 CO2e/m2
  • Size of slate 600mm x 300mm 500mm x 250mm*

    Minimum pitch**: Moderate exposure

    22.5° (100mm lap)
    20° (110mm lap)
    22.5° (100mm lap)
    Minimum pitch**: Severe exposure 25° (100mm lap)
    22.5° (110mm lap)
    25° (100mm lap)
    Maximum pitch 90° 90°
    Typical laps 100, 110mm 100mm
    Slate hooks Hook fixed 100 -150mm Hook fixed 100mm
    Maximum gauge 245 - 250mm 200mm
    Slate thickness 4mm 4mm
    Covering capacity (net)

    13.4 slates/m2 at 100mm lap
    13.6 slates/m2 at 110mm lap
    14.8 slates/m2 at 150mm lap

    20.0 slates/m2 at 100mm lap
    Weight of slating (approx)

    20.4 kg/m2 (0.20 kN/m2) at 100mm lap
    20.9 kg/m2 (0.20 kN/m2) at 110mm lap
    22.8 kg/m² (0.20kN/m2) at 150mm lap

    21.3 kg/m2 (0.21 kN/m2) at 100mm lap
    Battens required (net)

    4.00 lin.m/m2 at 100mm lap
    4.08 lin.m/m2 at 110mm lap
    4.45 lin.m/m2 at 150mm lap

    5.00 lin.m/m2 at 100mm lap
    Batten size recommended (fixed to BS 5534)

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

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

    Fixings Slate nails (30 x 2.65mm)
    Copper disc rivets (19mm dia. x 2mm stem)
    Slate nails (30 x 2.65mm)
    Copper disc rivets (19mm dia. x 2mm stem)
    Fitting Screws

    14 gauge self sealing

    14 gauge self sealing

    Slate hooks*** Length to equal to lap Length to equal to lap
    Authority BS EN 492 BS EN 492

    Cedral fibre cement slates meet the strength requirement of BS EN 492, achieving an average bending movement greater than 50 NM/M (Class B). The slates also have a minimum density of 1700 kg/m3 and a nominal thickness of 4mm.

    *Made to order

    **The minimum recommended pitch and lap may be influenced by special circumstances, please contact the Technical Advisory Team for further information

    ***When using slate hooks the perimeters /local areas (as defined in BS 5534) will require nails and rivets