Slate is a natural rock which has been formed by the action of massive heat and earth pressure on buried mud over a period of about 500 million years. It is an immensely strong and durable product. The formation of slate allows it to be split easily into thin slabs, making it a perfect natural material to be used for roofing. The properties of Stoneleaf natural slate are very similar to those of Welsh Slate. They have an almost identical texture and chemical constitution, and display the same performance characteristics.
Stoneleaf is known and respected as one of the country's largest suppliers of natural slate.
In specifying Stoneleaf slate, you will be assured of consistent quality and the undoubted aesthetic appeal of this strong and durable natural material.
When we make a promise, we deliver.
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- Cost: The enormous investment in plant and machinery means that our slate is very competitively priced; in fact it is less expensive than many man-made alternatives.
- Lifespan: Stoneleaf roofing slates are expected to last the lifetime of the building.
- Weight: Natural slate tiles can weigh as little as 25 kg/m2 when laid, compared with around 45kg/m2 for a typical interlocking concrete tile, or a clay plain tile which can weigh up to about 70kg/m2. This weight reduction can effect a considerable reduction in the cost of the roof structure.
- Size: Stoneleaf slates are available in a range of sizes, from 300x200mm, up to 600x300mm. They are available in thicknessess from 3mm to 10mm.
- Grade: Stoneleaf slates are produced and graded by hand. There are two grades available - Best and Standard. Standard grade are characterized by a less even surface and less consistency in thickness. There may also be a slight twist from top to bottom within the individual standard slate which may result in a longer fixing time. However there is no difference in the fundamental characteristics of the material itself, and of course, the standard product is less expensive.
- Design: Tile size and weight should be selected taking into consideration roof pitch, location of building and desired finish. Depending upon exposure conditions, tiles can be laid on roof pitches over 15°. The visual effect achieved by using smaller slates is very different to that using larger tiles. Using smaller slates can cut costs as these are easier to produce and create less wastage than the larger units.
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