What is fully supported?

What is fully supported?

The standing seam profiles Merlin Metals supply can be mounted on all roof build-ups.
The only prerequisite being that it is fully supported.
This means the panels are not suitable to span battens/purlins and require the full panel to be supported using a suitable substrate such as;

Ventilated 18mm wbp plwood, OSB3 or softwood boards.
Hard Metal Board
Composite Panel
SIPS Panel
Rigid Insulation
Cellular Glass Insulation