Benuza Blue Slate: 40cm x 25cm (16" x 10")

Benuza Blue Slate: 40cm x 25cm (16" x 10") grouped
  • 1st grade blue-grey roofing slate transforms into a beautiful slate roof.
  • Strong vertical grain produces a naturally stronger slate.
  • Easily worked, with minimum waste.
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Starting at £1.46 Inc. VAT


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Grouped product items
Product Name Qty
Benuza Blue Slates: 40 x 25cm (16'' x 10'')
£1.46 Inc. VAT
Benuza Blue Slates: 40 x 37.5cm (16'' x 15'')
£3.63 Inc. VAT

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Product Details

Benuza Blue Slate: 40cm x 25cm (16" x 10")

Benuza Blue slates capture the colour, appearance, and weathering characteristics that of a traditional Welsh Blue slate. Imported directly from the quarry by Ashbrook Roofing, these hard-wearing slates are quarried in La Bana.

This is the same region as the other great Natural Spanish slates. (Forna, Del Carmen and Matacouta).

Spanish slates are famous all over the world. The very 'best of the best' are quarried in a small region of northwest Spain called La Bana. Here the best quarries produce a particularly strong and easily worked slate.

It is renowned for its strong vertical grain that runs along the length of the slate.

This beautiful soft blue-grey roofing slate is equally suitable for use on contemporary, town, or country properties.

Many customers choose Benuza Blue Slates where they are particularly trying to capture the traditional feel and quality of a slate roof.

Others choose Benuza slate where quality and good looks are a priority.

Slate Specification:

Specification Value
Nominal Thickness 5.5mm (<+35%)
Deviation of Length, Width, Edge Straightness & Rectangularity Complies
Mechanical Resistance 

Transversal: 52.9 N/mm²

Longitudinal: 57.7 N/mm²

Water Absorption W1 (≤0.6%)
Apparent Calcium Carbonate <5%
Thermal Cycling T1
Exposure S1
Non-Carbonate Carbon Content Complies (≤2%)
External Fire Performance Deemed to Satisfy
Reaction to Fire Deemed to satisfy class A1
Release of Dangerous Substances None in specified conditions of use


These Benuza Blue slates meet the British Standards BS EN 12326, are a CE certificated slate, and are a W1, S1, and T1 slate.

For more information on the standards please see our Resource Centre for slates.

These slates can be fitted down to a 30° pitch with a coverage of 26.1 slates per m², and are virtually inclusion-free (pyrite), leaving no unsightly rust marks or steaks in the future of your roof.

They have a life expectancy of 100 years with a 30-year quarry-backed guarantee.

Head Lap

Below are the charts for the recommended headlap and rafter pitch based on a sheltered to moderate area to wind-driven rain. This map can be seen on BS 5534:2014+A2 2018.

United Kingdom

In general, any area that is within 30 miles of a west-facing coastline is considered to be in a severe exposure area.

This being said localised effects on any site must be taken into consideration.

Further reference to BS 8104 is advisable to ascertain localised effects.

*Image used in accordance to the Open Government License V3 -

Slate Size 25° 30° 35°
500 x 250 95mm 80mm 70mm
500 x 250H 95mm 80mm 70mm
400 x 250 - 80mm 70mm
400 x 250H - 80mm 70mm


If you know the quantities required, then you are welcome to order online. If you would like us to provide a free estimate from your plans, require a sample or two, or would like to have a general chat about all things roofing, then please give us a call on 01629 732988.

Benuza Blue Slates are available in a 1st grade 5-6mm slate or as a characterful 7-9mm ‘Heavy’.

We also have a slate presentation put together by our slate specialist. This is worth looking at to widen your knowledge, help you to make the important decision and to know what factors to consider when buying slate.

Please select here to view.

Product Delivery

Ashbrook Roofing offers Pallet Deliveries across the United Kingdom. (excluding the Highlands, Islands and Ireland)

Delivery expectation for orders placed before 14.00hrs (Mon - Fri) are:

  • Pallet Service - 2-3 Working Days


Pallet Service orders will be arranged beforehand with the customer as someone will need to be on site to accept the goods.


There is an additional delivery charge based on the weight of the goods. (£60 base charge for items under 750Kgs) 

And remember, if you need help, have any concerns or if you need a delivery extra quickly, simply give our customer service team a call on 01629 828500, or email us and we'll do our very best to help.

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