Thrutone Smooth

Description

Cedral Thrutone Smooth are a low-profile fibre cement slate that features a smooth surface and square cut edges for a sleek, aesthetically pleasing finish. They are particularly suitable to complex roof geometries. They are one of the strongest slates on the market and are popular with architects and roofers.

With more cement and fibres than any other, Cedral slates are the strongest slates in the market, tough enough to withstand the most volatile weather conditions.

Available in six colours, 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.

Technical data

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