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Range of Permissible Roof Pitch (degrees) 20
Compatible Roof Coverings Slates
Roofing Substrate
For certified wind uplift resistance in sound timber
Min rafter size (hxw mm) Min batten size (hxw mm)
See Manufacturers Website 38mm x 25mm minimum timber batten size
Further notes on fixing (where relevant) See Manufacturers Website
Maximum Design Wind Uplift
Calculated by dividing the characteristic wind uplift by the partial safety factor shown below
2.05 kPa
Partial (safety) factor(s) 1.44
Fire Classification BS476-3:2004 EN 13501-5:2005+A1 :2009
Limitations on Fire Classification Fire product tested was the TPVS photovoltaic system