Should I acclimatise my timber first, and for how long?
The moisture content that timber will settle to in a particular location is dependent on the temperature and, more importantly, the relative humidity of the surrounding air. This moisture content is referred to as the ‘equilibrium moisture content' (emc). If timber flooring is installed and subsequently loses moisture it will shrink. Likewise, if timber is installed and subsequently gains moisture it will expand. This shrinkage and expansion in service is referred to as ‘movement'. In order to minimise the risk of movement of floorboards in services, which can lead to unsightly gaps or lifting of the flooring, it is important that an appropriate moisture content for the timber is specified and that this is checked by the installer immediately prior to laying.
If a moisture content for the flooring has not been specified, or the moisture content of the flooring at the time of installation is not considered to be appropriate by the person installing the flooring, then the flooring should be stored for a period of time in the location in which it is to be installed. This period of acclimatisation will allow its moisture content to settle to the ‘emc' that the flooring will achieve when it is in service.
It is essential, during the acclimatisation period, that the ambient temperature and relative humidity levels are equivalent to those of service conditions.
Further information can be found in the publications listed below.
TRADA also provides a range of services for building designers, product manufacters and end users of timber flooring, including the design, specification or inspections of timber flooring, for more information please follow this link
Decorative Timber Flooring.
Outlines the types of decorative flooring available ie solid timber and multi-layer or engineered types. It discusses the timber properties required, suitable species and the all-important considerations of environmental conditions and moisture content. Finally, floor construction, laying and finishing seals are considered.
Sealing timber floors: A best practice guide
Deals with seal types and the selection, floor preparation, schedule specification and application of seals. Identifies common faults and their prevention. Covers polishing and maintenance and measures which can be adopted to avoid wear. Refurbishment and stripping of existing floors is also covered.
Seals for timber floors: A specification guide
Provides objective guidance on commercially available seals. Thirty products were subjected to a programme of laboratory tests, each dealing with a different performance criterion. A list of 'top ten' products for each of the tests allows users to select products that best meet the demands created by particular end-use environments. Describes the test methods used and explains how to use the guide through worked examples.
