The slate ashlar facade is made to measure in accordance with the design of the architect. Each stone is precisely calibrated as required and prepared by the manufacturer in accordance with work sketches at the rear for the installation of undercut anchors.
Depending on the substructure, only the undercut anchors provided and undercut staples required are installed on site, corresponding to the substructures used.
The facade system can be installed on the current substructure. Thus all requirements customary today with regard to heat protection and fire prevention can be fulfilled by this façade. The slate ashlar facade has been granted a general building authority permit by the DIBt (German Institute for Structural Engineering).
The undercut technology is permitted from a slate thickness of 10 mm, depending on the tile size, and thus allows for significantly lower material requirements, a lower surface weight and greater potential savings with the substructure in comparison with an anchor pin mounting.
The undercut technique
For the undercut technique using a slab of slate at least 10 mm thick, an undercut blind hole, approximately 7 mm deep, is drilled into its rear side and the anchor is inserted free of expanding force and positively locking.
One of the advantages of the invisible undercut anchor is the variety of the formats and joint widths. Thus the facade can be designed completely freely.
Tiles made from slate blue InterSIN slates as well as polar green ColorSIN slates are provided for symmetrical coverage with undercut technology. Both types of slate are available with either a natural surface or a polished surface.