This SL8® Vented Ridge Pack from Forticrete is designed to fit their range of SL8 concrete flat tiles perfectly and will allow warm, humid air to escape from the roof space of a building. The ridge system is available in Grey or Rustic colours and can be used with a Half Round or Uni Angle Ridge. The dry fix venting pack works with a ridge board roof with a maximum pitch of 55°. Each vented ridge pack will cover a 6-metre length of ridge (rafters at 600mm centres) and will provide a free vent area of 5000mm2/linear metre. The Forticrete SL8® roof tile manages to combine all of the visual characteristics of natural slate, whilst also ensuring superior features compared to other interlocking tiles on the market. Components 10 no. Steel Ridge Batten Brackets 40 no. 25mm Aluminium Nails 40 no. Top Fillers 28 no. 80mm Hammer Screws (1 x Washer, 1 Grommet) 13 no. Ridge Seals Product Specifications Coverage: 6m Free vent area: 5000mm2/linear Pitch Limits: 17.5° - 55° Colour: Grey