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Two plain slate alternatives to BritLock,
also made using 80% natural UK slate. BritSlate offers the random visual appearance of natural slate without the need for costly sorting and holing.

A double lap slate with all the proportions and detail as natural slate
Can perform at pitches of 20°

BRE Green Guide rating A
Manufactured using 100% green electricity
Manufactured in the UK’s first carbon neutral roof tile factory

Technical Info:- BritSlate

Britslate Countess 510 x 255 – Technical Data

Minimum roof pitch	22.5°*
Size of slate	510 x 255 mm
Cover width	255 mm
Profile depth	6 mm
Weight per 1000	1.3 tonnes
Weight per slate	1.3 kg
Weight per crate (including pallet/packaging)	1.4 tonnes
Quantity per crate	1000 tiles
Batten size – up to 600 mm rafter centres	50 x 25 mm
Nail type/size for slates	38 x 2.95 mm aluminium ring shank clout head

Note: Unless otherwise stated, data is based on slates laid at minimum headlap

Britslate Duchess 610 x 305 – Technical Data

Minimum roof pitch	20°
Size of slate	610 x 305 mm
Cover width	305 mm
Profile depth	6 mm
Weight per 1000	2.0 tonnes
Weight per slate	2.0 kg
Weight per crate (including pallet/packaging)	1.5 tonnes
Quantity per crate	750 slates
Batten size – up to 600 mm rafter centres	50 x 25 mm
Nail type/size for slates	38 x 2.95 mm aluminium ring shank clout head

Note: Unless otherwise stated, data is based on slates laid at minimum headlap.

*Rafter length restrictions apply at minimum roof pitch. For projects where the rafters are below the
minimum recommended roof pitch, please contact Sandtoft Technical Services on 0844 9395 999.

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 Services 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.

*Concealed ventilators must not be used on roof pitches below 22.5°

Moderate Exposure

Rafter pitch

20°

22.5°

25°

30°

35°

40°

45°

69°

Headlap (minimum)

Duchess

Countess

130

–

115

–

Coverage (m&sup2)

Duchess

Countess

13.7

–

13.2

19.8

12.6

18.7

12.2

18.0

12.2

18.0

12.0

17.6

12.0

17.6

–

17.6

Batten Gauge (mm)

Duchess

Countess

240

–

247

197

260

210

267

217

267

217

272

222

272

222

–

222

Battens per m&sup2

Duchess

Countess

4.16

–

4.05

5.08

3.84

4.76

3.74

4.61

3.68

4.65

3.68

4.5

–

4.5

–

4.5

Weight as laid (kg per m&sup2)

Duchess

Countess

27.4

–

26.4

25.7

25.2

24.3

24.4

23.4

24.4

23.4

24.0

22.9

24.0

22.9

–

22.9

Severe Exposure

Rafter pitch

20°

22.5°

25°

30°

35°

40°

45°

69°

Headlap (minimum)

Duchess

Countess

–

130

–

120

115

110

100

–

Coverage (m&sup2)

Duchess

Countess

–

13.7

–

13.4

19.8

13.1

19.1

12.6

18.7

12.4

18.0

12.2

18.0

–

18.0

Batten Gauge (mm)

Duchess

Countess

–

240

–

245

197

250

205

260

210

265

217

267

217

–

217

Battens per m&sup2

Duchess

Countess

–

4.16

–

4.08

5.08

4.00

4.88

3.84

4.76

3.77

4.61

3.74

4.61

–

4.61

Weight as laid (kg per m&sup2)

Duchess

Countess

–

27.4

–

26.8

25.7

26.2

24.8

25.2

24.3

24.8

23.4

24.4

23.4

–

23.4