Chemical developments improve mould control on freshly treated timber

A prominent timber treatment service provider in both Hull and Rochester, WJ Group continually reviews and develops the specification of its treatments to ensure that it can offer the best possible service to its customers. This focus led WJ Group to react to changes in the chemical market and as a result, see a profound improvement in the control of mould – a key issue for businesses working with freshly treated timber.

WJ Group MD, Mark Eggleston explains: “Working with a number of chemical companies to offer the best products to meet our customers’ needs, we were quick to embark on the trial of a new formulation for our Hull treatment site back in July. It can take some time to amass sufficient data to determine reliable results from such a trial but six months on, we’re confident that our new specification offers notable improvements where mould issues are concerned.”

Undoubtedly, the UK has very favourable conditions for mould and fungi growth. Warm and wet environments are the perfect breeding ground for unsightly mould growth on timber and it is important that the treatment services used offer the most robust preventative measure to inhibit growth. Freshly felled timber is most at risk of mould and fungi, whilst some species, such as pine are more susceptible than others due to the amount of sap present.

Eggleston continues: “Many factors can affect mould growth. Timber selection is clearly key and then the right treatment process is necessary, dependent on the end use of the timber. Once treated, it is vitally important that the timber is stored correctly and allowed to dry out fully – the time depending on many environmental factors in addition to the species of timber. It is insufficient or slow drying that can prompt mould to appear at this point in the timber’s life, given that mould clearly requires moisture to form. At WJ Group, we work closely with our customers to help them control this important issue, offering plenty of advice around the storage and handling of freshly treated timber.

WJ Group would offer the following tips when storing and handling freshly treated timber:

  • Store the timber in an outdoor area that is under cover, clean and free from dust
  • Do not store the timber under a tarpaulin or in a sealed container as this restricts airflow
  • Place the timber packs on a free draining, hard surface or concrete plinths
  • Ensure there is space between multiple packs and protect the timber from rain
  • If possible, position the timber to allow the prevailing wind to naturally help the drying process

For more information about WJ Group’s timber treatment services or further advice on mould control, please visit or phone 01482 338950.