Wanit Repro Roofing Slate is a fibre cement slate with an attractive riven surface with square edges. It is available in a dark grey colour.
Manufactured in Germany for Wanit Fulgurit by one of the leading
manufacturers of fibre cement slates in Europe. Wanit Repro slates are
composed of cement, man made and organic fibres of superior quality,
mineral additives and water. Mineral pigments are added to the mix to give a coloured through effect. A colour surface layer is added and the mix is fully compressed. After curing the slates have a double coating. They have a primer coat applied by a roller. Then the second coat is a very high quality inorganic acrylic coating that is baked onto the
slate. This gives a pore free silky finish of the highest quality. They are available from all Harris Slate & Stone (UK) Ltd. branches. Wanit Repro has been used in many pitch roof and vertical cladding projects including new house build, refurbishment, schools and commercial developments.
Performance Characteristics
Wanit Repro slates are manufactured to BS EN 492, 1994; Fibre cement slates and their fittings for roofing, product specification and test method. The manufacturer also guarantees them for 30 years against disintegration and 10 year colour performance. Full details of this guarantee are given in the left hand column of this page.
Handling, Storage & Working Precautions.
Precautions must be taken to prevent the level of dust released in the air to the minimum reasonable practicable level. Whenever possible cutting, sawing and drilling should be carried out in the open air. Avoid breaking the product unnecessarily. For further handling and working precautions please refer to our Health & Safety Data Sheet.
General Design Considerations
Wanit Repro slates when fixed to BS5534 Part1: 1997 Design will have adequate resistance to wind loads, wind uplift and rain penetration under most conditions. The specifier should check the annual driving rain index in BS5534 to decide if the area in which the slates are being laid is in a moderate or severe exposure area.
Moderate Exposure
|
Min
Pitch
|
Size
mm
|
Min End
mm
|
Slates
m.sq
|
Batten
Gauge
mm
|
Weight
kg/m.sq
|
|
23o
|
600x300
|
110
|
12.9
|
255
|
19.60
|
|
23.5o
|
600x300
|
100
|
13.2
|
250
|
20.00
|
|
25.5o
|
600x300
|
90
|
13.4
|
245
|
20.40
|
Severe Exposure
|
Min
Pitch
|
Size
mm
|
Min End
mm
|
Slates
m.sq
|
Batten
Gauge
mm
|
Weight
kg/m.sq
|
|
26.5o
|
600x300
|
110
|
12.9
|
255
|
19.60
|
|
29.5o
|
600x300
|
100
|
13.2
|
250
|
20.00
|
|
33o
|
600x300
|
90
|
13.4
|
245
|
20.40
|
Double Slates 600x600 are available
Technical Specification
Slate Size 600mm x 300mm
Holed 100/110mm lap
Weight per 1000 - 1530kgs
No per pallet - 960
Sitework
The slates are delivered on pallets of approximately 1600kg. The pallets must be stored in a dry place. On site the slates should be clear of the ground, the polythene cover split and the stack covered with tarpaulin.
Fixing
The slates should be laid in accordance with the code of practice for slating and tiling BS5534: Part1 1997 and BS8000 Workmanship on building sites Part6 1990. Wanit Repro slates are easily workable with normal slater’s tools. Each slate should be fixed with two 30mm copper nails and one copper disc rivet through the pre-holed positions. The slates should never be nailed too tightly. A 4mm (approx) gap should be left between adjoining slates.
Underlay
Protex roofing felt should be used or similar product to BS747: 1994. The underlay should be draped over rafters, or fully supported on boarding. It should allow any moisture to drain and should extend over the tilting piece, fascia board and into the eaves gutter.
Battens
Sizes are recommended in BS5534 for pitched roofs and vertical cladding. Harris recommends the minimum batten size for a 450mm span to be 38mm wide by 25mm deep and for a 600mm span
to be 50mm wide by 25mm deep.
Leadwork
Any lead used should be treated with patination oil as it is fixed. If patination oil is not used it could cause unsightly staining to the roof slates.
Ventilation
Adequate ventilation is required for all slate roofs. Ventilation provides the following benefits: Prolonged aesthetic appearance. Avoidance of condensation, resulting in superior insulation performance. Long term protection of roof structure. Harris Slate & Stone have a full range of ventilation products available. See our ventilation data sheet for full details. Accessories A range of GRC ridge tiles are available to suit most roof applications. See separate data sheets for full details.
Accessories
A range of GRC ridge tiles are available to suit most roof applications. See the roofing accessories section for further details.
