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AIA Refuel Program Accreditation

Queensland Timber Flooring has been accredited under the Australian Institute of Architects Refuel Continuing Professional Development program. We are very proud to be aligned with this important program and are looking forward to working with architects and designers to promote professionally delivered timber flooring solutions. ..

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Below we explain the three different methods that are generally used for installing timber flooring over concrete, and the way it is installed over particle board. Depending on design, type of flooring required, and budget, one of the following systems can be used for residential and some commercial projects. Any installation work over concrete should only commence once the concrete has been assessed at having an acceptable moisture content. To find out more about how we assess concrete and meet Australian Standards, see our Technical Information.

Installation Over Concrete

The Plywood System

Queensland Timber Flooring recommends the plywood system for quality residential work, where a secret nailed Tongue & Groove floor is required, as this method achieves a cushioned effect over concrete. This proven and reliable system involves laying a moisture barrier over the concrete, then fixing the 15mm plywood sheeting to the concrete using high tensile steel fixings. The floor boards are then secret nailed and fully glued to the plywood, giving a finished height of 34 mm for 19mm flooring and 29mm height for 14mm flooring. This system is preferred in residential installations as the solid mass of plywood sub floor eliminates vermin inhabitation and is a quieter floor to walk on compared to the hollow sound of the Batten System. 

The Batten System

This system is mainly used for fixing wide board Tongue & Groove flooring over concrete using a 70 mm x 35 mm hardwood batten which is fixed over a moisture barrier. The flooring is then glued and hand nailed through the top of the board to the battens, giving a finished height of 54 mm.
A 19 mm hardwood batten can also be used to secret nail and fix an 80 mm x 19 mm Tongue & Groove floor board over concrete, giving a finished height of 38 mm. This is a more economical system than the Plywood System, but has the disadvantage of being drummy to walk on.

Direct Glue System

This system involves gluing Tongue & Groove flooring directly to the concrete slab. As the adhesion of the glue is critical with this system, the concrete surface has to be extremely even and flat. After a site inspection by one of our trained supervisors we will advise if the concrete surface is good enough for the direct glue system. If the surface is too uneven the concrete will need to be levelled with a special concrete levelling material, which is carried out by specialist companies. At the time of inspection we will also determine the moisture content or relative humidity of the concrete, and again, if this too high then a liquid moisture barrier is required. So initially deemed to be a less expensive system, there can be hidden costs to be considered.

Installation Over Particle Board

To ensure a successful installation, it is critical that the particle board or plywood is securely fastened to the supporting joists below. It will be determined at the time of site measure by our supervisors if the sub-floor requires additional fixings. Prior to installation of flooring, it is a critical part of the installation system that the sub-floor is sanded. The entire sub-floor needs to be pre-sanded (not just the joints), so that the floor is completely flat and also to remove any contaminants from the surface that may affect the adhesion of the glue. The installation process of the Tongue & Groove flooring is the same as over Plywood System (see above).