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.