Page 45 - 365411 Findley 92pp A4 PBound.pdf
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A finely detailed surface and dressed edges that together reproduce the attractive appearance of natural slate.
Size of slate Minimum pitch*
Maximum pitch Typical headlaps Maximum gauge
Slate thickness Covering capacity (net)
Weight of slating (approx.) Battens required (net) Batten size recommended
Fixings
Authority
600mm x 300mm Moderate exposure
Severe exposure
90°
100, 110mm
245-250mm
4mm (nominal)
22.5° (100mm headlap) 20° (110mm headlap)
25° (100mm headlap) 22.5° (110mm headlap)
Blue/Black
13.4 slates/m2 at 100mm headlap 13.6 slates/m2 at 110mm headlap
20.4kg/m2 (0.20 kN/m2) at 100mm headlap 20.9kg/m2 (0.20 kN/m2) at 110mm headlap
4.00 lin.m/m2 at 100mm headlap 4.08 lin.m/m2 at 110mm headlap
38mm x 25mm for rafters/supports not exceeding 450mm centres (fixed to BS 5534)
50mm x 25mm for rafters/supports not exceeding 600mm centres (fixed to BS 5534)
Slate nails (30mm x 2.65mm)
Copper disc rivets (19mm diameter x 2mm stem)
BS EN 492
Cromleigh Graphite
* The minimum recommended pitch and lap may be influenced by special circumstances, please contact the Technical Advisory Service.
Minimum pitch tolerances can be reduced using
Permo Extreme
membrane
Includes VAT Plus Scaffolding
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