3.Machining and processing HPL
With regard to the subsequent use, it must be taken into account that HPL-Compact slightly changes in dimension (< 2.5 mm/m) when the climate changes. The change in length of the sheets is only half of the change in width. Rear ventilation Rear ventilation is obligatory in order to achieve as uniform climatic conditions as possible on both sides.
Known fastening and connection methods (e. g. continuous or concealed profiles, tongue and groove, screws, rivets) can be used for HPL-Compact. We always recommend using corrosion-resistant fasteners (caution: contact corrosion!).
For adhesive bonds, it has to be ensured that the dimensional changes of the sheets are not impeded. The adhesives have to be selected according to the expected stress. It is essential to consult with the adhesive manufacturers in this regard.
For installation on a substructure, it has to be taken into account that metal substructures change their dimensions during temperature changing. The dimensions of HPL-Compact also change under the influence of fluctuating relative humidity. These dimensional changes of metal and HPL can act in opposite directions. Sufficient flexibility therefore has to be ensured during installation so that both materials can move accordingly.
The sheets are usually mounted after alignment along a fixed point. This can be achieved with a drilled hole diameter adapted to the fastener (e. g. screws, rivets) or a fixed-point sleeve. The other hole diameters are implemented as sliding points, so that they are 2 – 3 mm larger than the diameter of the fastener. The relevant requirements in (building authority) approvals must be strictly observed.
