Direct stick timber flooring installation method; this method has been used for many years with parquetry. It’s also used with solid timber flooring and is becoming more commonly used with engineered flooring and bamboo. It is considered more cost effective than other methods, although due to greater requirements in assessing the concrete slab, it is more difficult. The method requires the concrete slab to be relatively even, as unevenness (highs and lows) in the slab will show in the final floor and potentially cause other difficulties. Therefore concrete grinding or levelling may be necessary to make sure the slab is sufficiently level.
An applied moisture vapour barrier is also recommended. While not always required, a moisture barrier offers good insurance against the moisture found in concrete slabs, which if too high, can cause problems for the timber floor. Be aware that a moisture barrier is not totally waterproof, rather it prevents vapour transmission, which is ultimately what will react with the timber. If you choose a Bamboo floor, it is recommended that two applications of moisture vapour barrier be applied. Following the application of the moisture vapour barrier, the flooring product is then laid using a full bed adhesive and may be weighted, temporarily nailed or permanently nailed to the slab to assist in good bonding of the boards to the slab.
Project in focus – Hunters Hill April 2015, Direct Stick Timber Flooring Installation