Birkdale Fibre Cement Slate

Smooth surface and dressed edges


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  • Blue Black
  • Birkdale Flame Brown
  • Birkdale Flame Grey
Blue Black
Size of Tile

20˚ pitches and above

15˚ pitches and above

600mm x 300mm

600mm x 300mm

Minimum Pitch

20˚ pitches and above

15˚ pitches and above

100mm lap

22.5° (moderate exposure)

25° (severe exposure)


110mm lap

20.0° (moderate exposure)

22.5° (severe exposure)



150mm lap
15° (6m max rafter length)
17.5° (9m max rafter length)

(moderate and severe exposure)

*The minimum recommended pitch and lap maybe influenced by special circumstances; please contact our Technical Advisory Service

Maximum Pitch

20˚ pitches and above

15˚ pitches and above



Minimum Headlap

20˚ pitches and above

15˚ pitches and above

100mm, 110mm


Maximum Gauge

20˚ pitches and above

15˚ pitches and above



Covering Capacity

(Net slates/m²)

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


Weight of Tiling  

20˚ pitches and above

15˚ pitches and above

20.4 at 100mm, 20.9 at 110mm

22.6 at 150mm

Battens Required

20˚ pitches and above

15˚ pitches and above

4.08 (net lin.m/m² at 110mm lap)

4.45 net lin.m/m²

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

19mm dia. x 19mm x 2mm stem in accordance with BS 5534

Authority BS EN 492

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.


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

The popular Birkdale fibre cement slate can be used for low pitch designs down to 15° (with hook fixing)* offering the designer and contractor more flexible aesthetic and installation options.

The hook fixing method is specifically for 15° - 20° pitches for moderate exposure roofs. This complements our Birkdale range using conventional nail and rivet fixing for steeper pitches or for severe exposure roofs.

Featuring a smooth surface and dressed edges Birkdale fibre cement slates offer a traditional and pleasing look at an affordable price.

The combination of colour, edge finish and design flexibility that the Birkdale offers means it is ideal as both a roofing and cladding solution, used on numerous projects including the Tally Ho training centre in Birmingham and the Holcombe Moor Army base near Bury.

* Fully tested for weathertightness in accordance with CEN TR 15601 standard and subject to exposure category and rafter length


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