Viroc cement particle boards can be fixed by either mechanical screw-fix or adhesive. The structure supporting the Viroc boards must be aligned and levelled to ensure the board does not warp. The sub-structure used is either treated dry pine beams or metallic profiles made from galvanised steel or aluminium.
Whilst the screw-fix approach is the most common method of fixing due to ease and efficiency, Viroc boards can also be bonded onto a metal or wooden sub-structure using a polyurethane, MS polymer or hybrid mastic adhesive.
Nailing is another method of fixing the board to the substrate, and can only be used with wooden structures – ideally indoor.
Download the recommended fixing guides for each of the below applications:
Lost Formwork, Perforated or Sandwich Board
General guidelines on Viroc board preparation
Viroc boards are easy to fabricate, just like wood. For thicknesses up to 19mm, circular saws are ideal and for greater thicknesses, the support of a workbench is recommended to support safety requirements as well as ensuring even surface quality. A jigsaw is ideal for curved cuts (using the correct blade depending on wood or metal).
A conventional hammer drill is ideal for drilling into the Viroc board, using drill components suitable for drilling metal.
Viroc board can be pre-fabricated with a sanded finish. When the board is sanded, wood particles become visible on the board surface, enhancing the board’s natural appeal. The thickness tolerance of the sanded board is ± 0.3 mm.
Machining of edges
Using a router, the edges of the panel can be machined to form bevel, tongue-groove or half lap joints. The tooling pieces should be tungsten carbide.
The Viroc panel can be varnished to improve protection against UV and rain. Continuous and steady application is recommended to support a uniform finish. Solvent based acrylic varnishes are ideal for application.
The Viroc panel can be painted for decorative purposes with a large variety of paints or coatings. A paint finish can contribute to the protection and longevity of the panel, as well as add aesthetic dimension to the overall build.