How to Install VJ Board

Intrim VJ Board Pro sheets must be delivered to a building site after the lock-up stage, including all external windows and doors installed, fully roofed and external cladding completed, at least 2 days prior to installation. They should be stored within the building close to where they are to be finally fixed to minimise the impact of the surrounding elements including moisture content, and in order for the sheets to acclimatise.

It is preferable to lie them flat in a low-traffic area for their safety with the top sheet placed upside down to keep the top sheet clean.

Where to Start Installation

If sheeting both ceilings and walls, it is best to fix the ceiling sheets first. This will then set the sheet position for the end walls – it looks best if the ceiling grooves line up with the wall grooves.

Before you begin to install your initial wall or ceiling sheet, you need to plan what Intrim corner mouldings and installation method you intend to use to complete your project.

When sheeting the walls, it is common practice to start installing your initial sheet at an internal or external corner and work around the room from that point.

1. Intrim recommends using Intrim Intense Hold adhesive. These cartridges suit a standard caulking gun. We recommend a continuous bead or spots (20mm diameter x 3mm thick) applied at regular intervals to all framing members, as this minimises vibration in walls. As a guide, approximately ½ tube of Intrim Intense Hold adhesive be used per 2.7m sheet. You may also use an equivalent adhesive available through retail outlets. PVA adhesive is used for gluing corners together and mouldings in place.
2. Use 38mm finishing nails or screws that won’t rust, and fix to the studs at 600mm intervals and 300mm across the top and bottom of the sheet.
3. Between each sheet at the join, a space of 0.5mm should be left, and where the sheets meet in the corner a 1mm space must be allowed, to minimise any deformity causing appearance defects in the sheets or at the joins, should there be any structural movement after installation. Never force one sheet into the other as this does not allow for any movement and therefore increases the potential for sheet deformity after installation. When installing sheets in-between 2 walls you must allow a 5mm gap between the edge of the lining board sheet and subsurface, at both ends of the wall, whether that be a timber/metal frame stud/upright or a finished wall surface such as plaster or brick. This 5mm gap will be covered by the lining board sheet that abuts it on the adjacent wall or a finishing bead in the internal corner.
4. Leave a gap of approx. 10mm at the top and bottom of each sheet to prevent the wicking of water up the sheet and to allow for structural movement.
5. A 9mm minimum space is required at the top and bottom ends of the sheets to allow for movement (mainly expansion and contraction). It is handy to use 9mm thick packer material (Intrim VJ Board Pro off cuts are great for this use), between the top of the floor surface and bottom end of sheets, to assist with the installation of sheets.
6. Where you are fixing Intrim VJ Board Pro over the original wall lining e.g. plasterboard or lining boards, it is important to nail or screw the sheets through the original wall lining, into the underlying structural sub-framework and apply a small bead of Intrim Intense Hold adhesive in a diagonal Crisscross formation to the rear face of the sheet you are fixing.

You may use a handsaw or an electric circular saw for cutting Intrim VJ Board Pro wall sheets. We recommend that the rear face of the sheet is positioned in a downward direction when using a handsaw, and the rear face of the sheet is positioned in an upward direction when using an electric circular saw, to minimise chip out, and form a neater finish to the cut edge.