Supaboard Flooring Installation Guide

The below information and details are provided merely as a guide for intended applications.

Product Range and Details Thickness: 18mm is standard [20mm & 25mm available on request] Dimensions: 900mm (W) x 1200mm (W); 2400mm (L); 2700mm on request (L) Special Orders: Supaboard Flooring can be ordered to specific sizes on request (max. length 3000mm).


Floor joists may be steel or timber and would normally be specified by the project engineer or architect; with consideration given to size and spacing. To allow for the most efficient fixing of the floor boards we recommend that the thickness of the joists and trimmers when used is not less than 45mm. The readily available standard steel and timber joist framing systems are suitable for the Supaboard Flooring System.


If timber joist systems are used, the manufacturer’s specifications for the system must comply with AS 1684.2 ‘Residential Timber-Framed Construction’. The Timber used for Residential construction must have a level of durability appropriate to the anticipated exposure conditions and expected service life. The joist thickness at the board joints must be a minimum of 45mm.


Steel framing systems must be in accordance with the relevant Australian Standards. The steel frame must also have the appropriate level of durability to prevent corrosion. The steel frame must have a minimum flange width of 45mm per board joint.


Supaboard flooring can be laid rough side up or smooth side up, however we recommend rough side up in most instances to gain adhesive qualities for glues, tiling and alike. After laying the board, sealing with Supaprime is essential before loading the floor, if rain or constant moisture will be present during the construction process sealing is also essential.


We recommend that in wet areas or if board will be exposed to constant moisture during construction, lay the board rough side up and maximum spans at 450mm stud centers. After board is laid it must be sealed with Supaprime before loading the floor.


The tongue and groove method of fixing provides for a 5mm wide expansion joint for movement. In any event, a control joint will be necessary for every floor space that exceeds 5m in any direction.


Fasteners must be fixed at a minimum of 15mm from the edge of each floorboard. The distance between the centers of the fasteners on joints must not exceed 300mm. Nailing (galvanized) may also be used in the same way to timber joisting at maximum 200mm centers.

If there is a supporting joist in the middle of the board, the fasteners should be fixed in the body of the floorboard and the distance between the fasteners must not exceed 300mm.


The floor boards can be cut easily with a power saw. Finer cuts are achieved by using power tools such as a circular saw, jig saw, bench top saw etc. Service holes may be created by using drills, hole saws or jigsaws. Holes can also be formed by drilling a number of holes around the perimeter of the opening to be formed and then punching out the center.

NB: Please observe Occupation Health and Safety Practices as dust will result from mechanical cutting.

Technical Note
SUPABOARD Flooring Installation Guide
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