Alpina natural slate
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Roof Slate Alpina natural slate from Brazil grey/green & graphite

Alpina Natural slate The best natural and man-made slates the world has to offer are available from Cembrit Ltd. Cembrit Ltd are members of the Cembrit Holding A/S Group of Denmark, one of Europe’s major building material producers with over 80 years experience in the manufacture of fibre reinforced cement products for the roofing and cladding industry. Using skills accumulated over 80 years, Cembrit Ltd select natural slate from Spain, Canada, Brazil, North America, China and India. From UK quarries, Cembrit Ltd offer Welsh and Westmorland slates. A range of recommended accessories is also...

Appearance Alpina slates are available in a number of metric sizes, in 2 colours. Both colours are classified as having a normal texture according to BS EN 12326. General design considerations Alpina slate is a tough natural material and samples are regularly tested to the following national standards: Alpina slate laid to BS 5534 will meet the strength requirements for the imposed and uniformly distributed wind and snow loads etc. The site exposure rating and the pitch of roof rafters will determine the size, pattern, lap and fixings for the slates. For UK and Northern Ireland locations,...

Alpina Tables Table I Moderate Exposure less than 56.5 l/m2 per spell - In general, the recommendations below apply to rafter lengths of not more than 9m.The specifier should also take account of any abnormal conditions that might apply. Pitch Slate Size Minimum Slates Batten Holing Average headlap gauge gauge weight Table 2 Severe Exposure greater than or equal to 56.5 l/m2 per spell - In general, the recommendations below apply to rafter lengths of not more than 6m.The specifier should also take account of any abnormal local conditions that might apply. Slate Size -These tables are based...

Sitework Storage and handling Slates should be carefully stacked on their longer edges with timber bearers, battens or boards between layers. The lowest layer must be arranged on a firm level base. Working Slate can be cut and holed on site by hand or machine. Care must be taken to avoid undue spalling. Slates should be holed from the bed towards the face so that the nail-head is accommodated in the small cavity formed by the area of spalling. Individual slates should be holed so that the thicker end is at the tail of the slate. Before fixing, the slates should be sorted into three or four...

The information contained in this publication and otherwise supplied to users of the company’s products is based on the company’s general experience, best knowledge and belief. However, because of factors beyond the company’s knowledge and control, which can affect the use of the products, no warranty is given or implied with respect to such information. The company’s policy is one of continuous improvement. Cembrit Limited therefore reserves the right to alter specifications at any time and without notice. 57 Kellner Road London SE28 0AX As with all natural materials, colours and textures...