The Celtas natural roofing slate is produced from quality Grade ‘A’ rock, formed 400 million years ago, during the Ordovician period, the same time as Welsh Slate. This roofing slate comes in a range of sizes to suit different looks, and offers 3 grades to select from Best, Heavy Mix and Standard.
With a 100 year guarantee the Celtas slate offers you peace of mind that the roof will outlast the life of the building
This roofing slate complies with all relevant British and European standard BS EN 12326 and the test results show that this slate is A1, T1 and S1.
Source:
La Baña, Leon, Spain
Approx. Thickness:
6mm
Colour:
Blue Black
Texture:
Smooth
Sizes Available:
500 x 250mm
Grades:
Best, Heavy, Standard
Pre-Holing 500 x 250mm:
90mm lap
Coverage at 90mm lap:
19.5 per M2
Slate and a half:
Available un-holed
Strength:
Good flexural strength both transversely and longitudinally. A recommended 5% wastage allowance should be applied.
Approx. Weight:
43kg / M2 based on 500 x 250mm laid to 90mm lap
Guarantee:
Up to 100 year site specific guarantee available upon request depending on grade
BS EN 12326-1:2014 Test Results:
Water Absorption W1, Thermal Cycle T1, Sulphur Dioxide Exposure S1
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