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Technical - BritLock Slate

 BritLock  Slate

UK Registered design No. 2017033

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Technical Data

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Minimum roof pitch*
17.5° at 120 mm headlap
22.5° at 75 mm headlap
Headlap (minimum)
75 mm
Headlap (maximum)
120 mm
Batten spacing at maximum gauge
285 mm
Batten spacing at minimum gauge
240 mm
Size of tile
360 x 340 mm
Covering capacity at maximum gauge
13.9 tiles per m² at 120 mm headlap
11.7 tiles per m² at 75 mm headlap
Cover width
300 mm
Profile depth
11 mm
Hanging length
354 mm
Weight as laid
19.5 kg per m² at 120 mm headlap
16.4 kg per m² at 75 mm headlap
Weight per 1000
1.4 tonnes
Weight per slate
1.4 kg
Weight per pallet (including pallet/packaging)
0.7 tonnes
Quantity per pallet
500
Battens per m²
4.2 m at 120 mm headlap
3.5 m at 75mm headlap
Batten size - up to 450 mm rafter centres
38 x 25 mm
Batten size - up to 600 mm rafter centres
50 x 25 mm
Nail size/type for slates
38 x 2.95 mm aluminium clout head (supplied)
Nail size/type for tile clips
N/A
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After installation, natural weathering of the recycled slate will result in a change to the exposed surface, replicating the appearance of natural slate. Contact Sandtoft Technical Support for further information or to request a mini-sample which shows the comparative change to the surface appearance due to weathering, the rate of which depends on the local environment, climate and aspect of the roof.

Slight colour variations may exist between batches. Slates should be randomised on site to achieve a consistent appearance when installed.
 
*Rafter length restrictions apply at minimum roof pitch. Please contact Technical Support for further information.
 
Note: unless otherwise stated, data is based on tiles laid at minimum headlap
 

Tile Fixing

Sandtoft roof slates must be laid and fixed to comply with BS 5534: the British Standard Code of practice for slating and tiling, and BS 8000: Part 6: the British Standard Code of practice for workmanship on building sites.
To ensure compliance with these Standards we strongly recommend that either the recommendations given in the Sandtoft Zonal Method User’s Guide and Zonal tables must be followed where available or a calculated fixing specification must be obtained using Sandtoft’s Fixing SPEC service.
 
For further information go to Fixing SPEC or contact Sandtoft Technical Support on 0870 145 2021