The VP is part of the I-Loft system. The vent plate is a 1.2mm thick, 300mm long galvanised steel plate which provides a fast and cost effective solution to providing ventilation in the roof space.
Once installed, it allows the six 20mm diameter holes to be drilled, whilst maintaining the strength of the solid sawn timber. By providing a ventilation path though the roof, over the insulation in the loft conversion ceiling, the condensation problems arising from the difference in temperature between the inside and outside are avoided.