Metal channels

In this alternative system, the boards are fixed to a series of metal channels, which are themselves bonded on adhesive dabs to the background. The vertical channels are fixed at 600mm centres with top and bottom channels running horizontally. The boards themselves are fixed to the channels with special screws, typically at 300mm centres.

Note: The boards must be well fitted to ensure that there is no flow of air behind the boards. Failure to do this will reduce their thermal performance. Additional sealant can be provided around the edges of junctions, i.e. around window reveals, external angles, etc.