A screw for a panel with a mineral wool core must connect the panel to the correct support and maintain the sealing of the fixing point. It is not selected solely by core thickness. The steel facings, the material of the structure and the wind load are important. The number and arrangement of fasteners are determined for the specific wall. A universal number of pieces per metre can be misleading. The panel thickness, the type of fixing and the material of the support must be known. Steel, timber and a subframe fixed to masonry place different requirements. With steel, the drilling range of the fastener and the thickness of the element are important. A screw intended for a thin wall is not automatically suitable for a thicker section.

A panel with a mineral wool core requires supports with adequate load-bearing capacity and geometry. The structure must carry its weight and wind action. It must also allow connections and flashings to be fixed correctly. In a small pavilion, this does not mean an arbitrarily light frame. Selection requires assessment of the entire wall, openings and the method of connection to the foundation and roof. The wall carries self-weight and actions perpendicular to its surface, primarily wind. The panel transfers these through fixings to the supports. The forces must then reach the main structure and foundation. Every stage matters. A strong column will not compensate for an inadequate connector or an incorrectly anchored rail.