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Lazonby Diminishing Reproduction Stone Slate

Advantages of Lazonby Diminishing Reproduction Stone Slate

  • Designed to Diminish
  • Weight 75kgm2
  • Construction allows easy cutting without cracking or breaking
  • Looks like stone when cut
  • Light weight construction saves on labour and timber costs
  • Weathers like stone not concrete
  • Approved for Conservation Areas, National Parks and Grade 2 Listed Buildings
  • manufactured in the ukManufactured in the UK
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Greys Roofing Reproduction Random Diminishing Lazonby Stone Slate

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Lazonby Reproduction Stone Roofing Slates are hand crafted to give an authentic roofscape. Detailed moulding and a range of sizes create a coursed and diminishing stone slate roof.
The glass fibre cement construction provides a light yet durable roofing material. An easy to lay format and a range of compatible products, including ridges and in-line ventilation systems, create an extremely versatile and cost effective alternative to natural products.
Each individual slate is hand crafted using moulds taken from stone slate originals. As with natural stone, shades vary with no two slates being identical. This combined with the surface detail and hand colouring ensures a truly authentic roofscape.

Designed to Diminish

Our slates are designed to give a random diminished course roofscape. A wide range of sizes ensure the roof can be laid using a random diminishing course technique providing greater weather protection and an authentic look.




Greys Artstone Stone Slate Size

Reproduction Stone Slate Technical Data

Our standards speak for themselves

  • Weight - 75kgm2
  • Construction - Glass Fibre Reinforced Cement
  • Fixings - 35mm plastic or alloy pegs to BS 5534:2003 codes of practice for slating and tiling
  • Durability - To BS 7543: 1992, 'The durability of building and building elements, products and components'
  • Colour - Coloured through with pigments to BS 1014
  • Fire - None combustible to BS 476 P.T.4
  • Approved for Conservation Areas, National Parks and Grade 2 Listed Buildings
  • Freeze / Thaw - Products comply to BS EN 492:2012
  • Strength - Better than BS EN 492:2-12
  • Permeability - To BS EN 492:2012
  • Ventilation - Net free ventilation area - Slate 10,000mm2, Ridge gives 12,500mm2, for 5mm continous air gap install every 2.5m

All the slates in our range have been successfully tested for durability, colour, strength, fire and freeze thaw. Many of our competitors use traditional concrete, their slates aren’t protected from the elements, which will expose the aggregate over time. See the example below.

Example of GRC Construction versus none GRC Construction.
Greys GRC Slate

Weathers like a natural stone or slate product

Aggregate Concrete Slate

Weathers and shows aggregate over time

  • Greys GRC Slate

    Weathers like a natural stone or slate product

  • Aggregate Concrete Slate

    Weathers and shows aggregate over time

In a recent document The International Glassfibre Reinforced Concrete Association recommend that for good quality GRC, ductile lifetimes of at least 60-80 years can be confidently expected in UK weather conditions. (Source: www.grca.org.uk).

Roof Pitch Headlap Specification

  • 3” Overlap – Roof pitches between 28 degrees and above
  • 4” Overlap – Roof pitches between 28 degrees and 24 degrees
  • 5” Overlap – Roof pitch between 24 degrees and 20 degrees (Double felting and boarding recommended depending on roof exposure at minimum pitches)

Ridges and Ventilation Systems

Greys Artstone Reproduction Stone Ridge

Lazonby Reproduction Stone Slate Ridge

Lazonby Reproduction Stone Slate Vent Ridge

Greys Artstone Vent Slate

Lazonby Reproduction Stone Slate Vent Slate


Our Green Credentials:

Greys Roofing Products are manufactured using CEM 2 Cement that contains 30% Fly Ash (Fly Ash is the correct term as appears in European and British Standards and has replaced “pfa”) Pulverised Fly Ash (pfa) is a waste product of pulverised fuel (typically coal) from fired power stations.

Our Products are Guaranteed

We’re confident our product is durable enough and manufactured to the highest of standards that we give a 25 year manufacturer guarantee.

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Colour and Efflorescence COLOUR: Stone and Slate colours on this website are subject to the limitations of monitor quality and are for guidance only. EFFLORESCENCE: The phenomenon of efflorescence has been a problem to the construction industry for decades. The cause lies in the basis chemistry of all Portland cements. Efflorescence in Greys Artstone products is a temporary phenomena and will disappear over time.

Download Greys Artstone Reproduction Stone Brochure

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  • Contact Details
    Greys Artstone Limited
    Lees Mill
    Lees Mill Lane
    HD7 5QE
    Telephone: +44(0)1484 666400
    Fax: +44(0)1484 662709

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