With quality at the heart of everything we do, we understand how pressure treatment extends the life of our products. The majority of our stock timber products are pressure treated with Tanalith® E preservative to protect against the threat of rot or insect attack.

To ensure a consistent high standard of all treated timber, we operate a dedicated treatment facility. This also allows us to offer treatment services for customers who procure their own timber.

Tanalith® E is a leading global brand in wood preservation, providing effective protection against fungal decay and insect attack. Introduced to Europe in 1992, it has over 30 years proven performance. When impregnated into the timber through a high-pressure process, Tanalith® E components bond with the wood structure and cannot easily be removed, helping to significantly extend its service life.

Timber treated with Tanalith® E is trademarked as Tanalised® Timber. Over the years, due to the success of Tanalith® E, the word ‘Tanalised’ has been used to refer to general treated timber, as has ‘green’ timber. Other treated timbers may not offer the same long-term performance credentials as genuine Tanalised® Timber, so we would always recommend that you check with suppliers about the wood preservative that they use.

Tanalith® E treated timber has an initial green colour, hence the reason it is commonly referred to as ‘green’ treated. Upon external exposure, the colour will slowly weather to a warm, honey brown and, in the longer-term, to a natural silver-grey.

We understand that for some fencing and landscaping projects, an initial brown colour is preferrable. To help, we can add Tanatone®, a brown colour additive, to the high-pressure process which eliminates the need for brush applied colour at the point of installation. Over time the brown colour of Tanatone® will gradually fade. If required the colour can be refreshed with a brush-on colour product. When Tanatone® is added to the treatment, it is commonly referred to as ‘brown’ timber.

To find out more, click here to download a copy of the Tanalised® Timber Treated Timber User Guide. In this User Guide you will find out more about working with Tanalised® Timber. Remember, when working with pressure treated timber, any cuts or notches must be further treated with a brush-on end grain product to maintain the integrity of the preservative protection – speak to us for more details.

The level of preservative treatment is varied according to the Use Class situation that the timber is exposed to during its life. Generally, a greater degree of protection is required as the Use Class increases. Tanalised® Timber is suitable for all the Use Classes.

UC1: Internal, dry (e.g. Upper floor joists)
UC2: Internal, risk of wetting (e.g. Tile battens)
UC 3 coated (3.1): Outdoors, coated, above ground (e.g. Soffits/Cladding)
UC 3 uncoated (3.2): Outdoors, uncoated, above ground (e.g. Cladding/Fence rails)
UC 4: Direct soil or fresh water* contact (e.g. Fence posts)

*Please ask us for specific water contact details by product

We carry ready treated stocks of many of our timbers or can arrange specific treatments to order, including a service treatment option for customers own timbers.
The treatment is industrially applied through a high-pressure process. Click below to view a short animation of the timber treatment process: