The installation process is also straightforward – first check the rafters carefully to ensure they’re clean, free of nails and angled to the correct fall. You’ll also want to measure out the roof for the Eco-Deck boards, fixing 50 x 50 mm (2” x 2”) noggins in any areas where the board edge won’t be supported by a rafter or will be cut to fit around features such as rooflights.
Next, apply a continuous bead of mastic across the top of all these supporting timbers then lay the Eco-Deck boards over the top with the plywood side facing up. Take care to ensure that all edges are supported by at least 20 mm of supporting timber and that long-edges run over the centre of joists. You can then screw them into the rafters/noggins at 300 mm centres, ensuring the fixing points are at least 10 mm from the edge and 50 mm from the corner, and that the screws are long enough to penetrate the rafters by 35 mm.
The deck is now ready for the waterproofing system. Eco-Deck supports a range of options including mechanically fixed single-ply waterproofing membranes, mastic asphalt, roll & pour and adhered systems. Whichever option you choose, make sure you fit a 25 mm thickness of insulation on any upstands.