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FAQs

Please find below a list of our FAQs. Should the question you have not be listed, please do not hesitate to contact us here.
  1. What are the recommended areas of use for TANALISED timber?
  2. With regard to the specification of preservative treated timbers, what are 'Commodity Codes' and 'Z12'?
  3. Can I use TANALISED timber around my fish pond?
  4. Can I use TANALISED timber for making bat shelters?
  5. Can TANALISED or TANATONE pressure treated timber be used for the construction of bee hives?
  6. Is TANALISED timber safe to use in nature reserves and aviaries?
  7. I am doing a COSHH assessment on the treated timber we stock. Can you send me a material safety data sheet for your preservative products?
  8. Is TANALISED timber safe to use in children's playgrounds?
  9. Is TANALISED timber safe to use for compost bins and earth retaining structures for organic vegetable beds?
  10. Where can I find details covering waste management issues?
  11. What makes a Quality Treatment?
  12. How do I make sure I am installing my treated fencing timbers correctly?
 
What are the recommended areas of use for TANALISED timber?
TANALISED  pressure treated timber is designed for a wide range of end uses from internal building timbers through to external timbers in ground or fresh water contact. Typical end uses are classified as Use Classes 1-4 as defined in BS EN 335-1. TANALISED pressure treated timber is suitable for use in any of these Use Classes. TANATONE pressure treated timber with a built-in brown colouration is recommended for fencing and landscaping timbers, typically Use Class 3 uncoated and Use Class 4. TANALISED Extra pressure treated timber with built-in water repellency is usually recommended for exterior decorative garden and construction timbers – Use Class 3 uncoated or Use Class 4.
 
With regard to the specification of preservative treated timbers, what are 'Commodity Codes' and 'Z12'?
Commodity Codes are a series of typical end uses for preservative treated timber created by the UK Wood Protection Association, currently ranging from C1-C12. 'Z12' relates to specifications for different types of industrially applied wood preservative and fire retardant formulations from the National Building Specifications part of RIBA Enterprises Ltd.  All Lonza Wood Protection preservatives are Z12 compliant.
 
Can I use TANALISED timber around my fish pond?
TANALISED timber is suitable for use in, around and over garden ponds.  However, where fish are present, we recommend that direct water contact is avoided.  Whilst we are confident about the safety of TANALISED timber, fish are very sensitive creatures and may respond unfavourably to changes in their surroundings.  Prior to use, you should ensure that the timber is in a dry condition; two weeks post treatment is usually sufficient time to allow for drying although this is weather and storage condition dependent.  Please also ensure that the timber you use has been treated to the correct specification - Lonza Specification Code TE/Gfa if the timber is to be used above ground (Use Class 3) and TE/GFb if it is to be used in ground (Use Class 4).
 
Can I use TANALISED timber for making bat shelters?
Bat roosts and shelters are closely protected by conservation legislation.  You must consult the Statutory Nature Conservation Organisation for your area (Natural England, the Countryside Council for Wales, Scottish Natural Heritage) before doing anything.  The Bat Workers' Manual, published by the Joint Nature Conservation Committee, provides initial guidance.  You can order this from NHBS Ltd, 2-3 Wills Road, Totnes, Devon, TQ9 5XN.
 
The Bat Workers Manual recommends the use of pre-treated timber; therefore, we can confirm that it is safe to use TANALISED and VACSOL Aqua treated timber.
 
Can TANALISED or TANATONE pressure treated timber be used for the construction of bee hives?
TANALISED or TANATONE pressure treated timber is suitable for use in a bee hive.  However, you should not use it for internal elements of the hive that will come into direct contact with honey.  Prior to use, you should ensure that the timber is in a dry condition; two weeks post treatment is usually sufficient time to allow for drying although this is weather and storage condition dependent.  Please see our Treated Timber User Guide for more information on the use of TANALISED timber.
 
Is TANALISED timber safe to use in nature reserves and aviaries?
TANALISED timber is suitable for use on a nature reserve or for constructing aviaries.  Prior to use, you should ensure that the timber is in a dry condition; two weeks post treatment is usually sufficient time to allow for drying although this is weather and storage condition dependent.  Please see our Treated Timber User Guide for more information on the use of TANALISED timber.
 
I am doing a COSHH assessment on the treated timber we stock.  Can you send me a material safety data sheet for your preservative products?
The Control of Substances Hazardous to Health (COSHH) Regulations refer to substances.  Preservative treated timber is not a substance, but an article, and therefore COSHH regulations do not apply to the actual treated timber. The preservative treated timber should be delivered to you in a surface dry condition.  This is safe to handle as recommended and can be handled in the same way as untreated timber.  The Treated Timber User Guide, which provides health and safety handling recommendations, may also assist in carrying out your COSHH risk assessment.
 
Is TANALISED timber safe to use in children's playgrounds?
TANALISED Timber is safe to use for structures in and around children's play areas.  With regard to any concerns that the children may 'chew' or 'eat' the treated timber, we have to conduct safety studies to demonstrate safe use of our products as part of their approval process.  These studies have shown that the preservative within the timber would not cause harm to a child in the quantities that they are able to 'eat' or 'chew'. Please see our Treated Timber User Guide for more information on the use of TANALISED timber.
 
Is TANALISED timber safe to use for compost bins and earth retaining structures for organic vegetable beds?
TANALISED timber is suitable for the construction of compost bins and for use as earth retaining structures for organic vegetable beds. The Soil Association (www.soilassociation.org) states that if the timber used for organic vegetable beds is preservative pre-treated then there are no issues in terms of organic status. If, however, the wood is treated once the raised bed has been built (brush applied preservative) then this would affect the status of the land. Please see our Treated Timber User Guide for more information on the use of TANALISED timber.
 
Where can I find details covering waste management issues?
Information on Waste Management can be found in our Treated Timber User Guide.
 
What makes a Quality Treatment?
Preservative pressure treatments will significantly extend the service life of timber by providing an effective protection against all forms of wood decay and insect attack. Carried out in industrial treatment vessels by trained operators, treatments use a proven process of pressure and vacuum cycles to impregnate the wood preservative deep and permanently into the timber cells. For more details on what makes a quality treatment particularly for fencing and agricultural timbers click here.

How do I make sure I am installing my treated fencing timbers correctly?
Just like any other product treated timber has to be installed and used correctly to get the very best long term performance. For more details on the how to achieve this with ground contact fencing timbers in particular click here.
 
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