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Garsdale slates feature a detailed textured surface and crisp square edge. Versatile and easy to install making them a favourite with both architects and contractors alike.

Garsdales have been chosen on numerous projects to satisfy both facade and roofing requirements, such as Broxden Dental Centre in Perth and Methven social housing scheme in Scotland.

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

Size of Tile

600mm x 300mm

Minimum Pitch 100mm lap
Moderate exposure 22.5°
Severe exposure 25°

110mm lap
Moderate exposure 20°
Severe exposure 22.5°
Maximum Pitch 90°
Maximum Gauge


Covering Capacity 13.4 slates/m² at 100mm
13.6 slates/m² at 110mm
Weight of Tiling 20.4 (0.20 kN/m²) at 100mm lap
20.9 (0.20 kN/m²) at 110mm lap
Battens Required 4.00 (net lin.m/m²) at 100mm lap
4.08 (net lin.m/m²) at 110mm lap
Batten Size Recommended 38mm x 25mm for rafters/supports not exceeding 450mm centres
50mm x 25mm for rafters/supports not exceeding 600mm centres
Tile Nails

30mm x 2.65mm

Copper disc rivets


Authority BS EN 492
Notes Fibre cement slates meet the strength requirements of BS EN 492, achieving an average bending moment greater than 50Nm/m (Class B). The slates also have a minimum density of 1700kg/m³ and a nominal thickness of 4mm. 

The batch code printed onto the underside of the slates or slate fittings is in one or the following formats:

Example 1: NT UG21WB 24/11/11 12.10 CE

NT = Type of product (ie. Non asbestos technology)
UG21 = Product code
W = Factory of origin code
B = Class (for bending moment)
24/11/11 = Date of manufacture dd/mm/yy
12.10 = Time of manufacture
CE = CE Mark

Example 2: T 2 14 20 C1 NT

T = Factory of origin code
2 = An internal factory coding
14 = Year of manufacture
20 = Week number of manufacture
C1 = Shift of manufacture and  product type
NT = Type of product (ie. Non asbestos technology)

Example 3: CE 7 B 13 112 X NT 11:12

CE = CE Mark
7 = Factory of origin code
B = Class B (Note This may or may not be present)
13 = Year of manufacture
112 = day N° of manufacture
X = Shift (X,Y,Z)
NT = Type of Product (ie. Non asbestos technology) 
11:12 = Time

Example 4:   (fittings) 14.01.14  20  &  CE M NT  &  O

14.01.14 = Date of manufacture
20 = Roof pitch (degrees)
CE = CE mark
M = Factory of origin code
NT = Type of product (ie. Non asbestos technology)
O = Internal factory code

The effectiveness of the tile or slate to operate at the minimum recommended pitch and lap may be influenced by special circumstances. Guidance on pitch and lap should be obtained from the Technical Advisory Service for the following:
• Interlocking tiles and slates where the roof slope exceeds 6 metres in length and/or the site is rated to be in a severe exposure category.
• Double-lap fibre cement slates where the roof slope exceeds 6 metres in length (severe/very severe exposure) and 9 metres in length (sheltered/moderate exposure). 
Note: Consideration should be given to sealing any cut edges to prevent potential efflorescence staining. Contact TAS for further details.

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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 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.
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