Traditional fixing of Rockpanel Lines² 10 on a timber sub-frame
The Rockpanel Lines² 10 tongue-and-groove panels can be fixed invisibly, which results in an attractive traditional groove effect, using:- Rockpanel ring shank nails (EN10088, material nr. 1.4401 or 1.4578) 2.1/2.3 x 27mm with an ultra-flat head. For an even better result we recommend pre-drilling of the tongue with a steel drill Ø 3 mm on the edges and Ø 2 mm in the middle of the board.- Stainless steel flat-top screws 3.5 x 30 mm. The tongue should be pre-drilled with a steel drill Ø 3.5 mm on the edges and Ø 2.5 mm in the middle of the board and the hole for the flat-top screw head should be sunk with a countersink drill bit. The top of the screw head should be level with the surface of the tongue. Tension in the mounting of the tongue can be avoided by torqueing the screw to a set limit and by ensuring they are driven in to the batten correctly.