Boron Treated Timber
Process, Uses and Health and Safety Implications.
Boron-treated timber is an environmentally friendly option that effectively protects wood from insects and decay, making it ideal for interior applications where the timber remains dry.
What is Boron Treated Timber?
Treating timber is crucial for extending its life, helping it resist decay, insects, and other environmental threats.
Boron treatment is particularly effective for interior applications, offering protection against borers and fungal decay while maintaining the wood’s structural integrity. This treatment is ideal for dry or areas subject to occasional wetting , reducing the need for frequent timber harvesting and supporting forest conservation efforts.
Boron Treated Wood
How Boron Treatment Works
Boron based preservatives penetrate the timber, providing effective protection against wood decaying fungi and insects without affecting the wood's structural integrity. Unlike some other treatments, boron does not contain heavy metals or organic solvents, making it a more environmentally friendly option. It’s most effective when used in situations where the timber is kept dry, as boron can leach out of the wood if it is exposed to continuous moisture.
What Can Boron Treated Timber Be Used For?
Boron treated timber is a versatile material commonly used in various interior applications that require protection from borer and decay. It is particularly ideal for wall, floor, and ceiling framing, where the timber remains shielded from the weather. Additionally, it excels in interior joinery, making it suitable for doors, windows, and furniture that are not exposed to moisture. While primarily for indoor use, boron treated timber can also be used for external cladding if it is well sealed and protected from the weather, such as with a water repellent coating.
Health, Safety, and Environmental Considerations
Boron treated timber is generally considered safe for use in many applications due to its low toxicity to humans and animals. Here are some key points to consider:
Safety
Borates have low acute toxicity, meaning they pose minimal risk to people or pets in small amounts.
However, it’s still important to handle boron treated timber with care. When cutting, sanding, or machining boron treated wood, always wear protective gear, such as gloves, safety glasses, and a dust mask, to avoid inhalation of wood dust and minimise skin contact.
Environmental Impact
Borates are naturally occurring compounds and are considered environmentally friendly, especially compared to more toxic preservatives. They have a low environmental impact and are even essential for plant health in small quantities. However, since boron can leach out when exposed to water, it’s crucial to use boron treated timber in environments where it will remain dry, or ensure it is adequately sealed if used in more exposed settings.
Disposal
Dispose of boron treated timber waste in accordance with local regulations.
While it is less hazardous than some other treated woods, it’s still important to follow proper disposal procedures to avoid environmental contamination.
Boron treated timber should primarily be used in interior applications or in areas where it can be kept dry. It is not suitable for use in ground contact or environments where it will be exposed to continuous moisture, such as in exterior settings without proper sealing. For example:
Ground Contact
Boron can leach out of timber when exposed to water, making it unsuitable for use in ground contact or in permanently wet environments.
Unprotected Exterior Use
If used outdoors, boron treated timber must be fully protected from moisture with a water repellent coating or placed in areas where it will not be exposed to rain or prolonged dampness.
Make Sure You Know Your Requirements
The Hazardous Substances & New Organisms (HSNO) documents outline the compliance requirements for the treated timber industry. If you run or work in a treatment plant, it's a great idea to familiarise yourself with these requirements.
Other Timber Treatment Methods
While boron treatment is excellent for certain applications, it’s just one of many timber treatment methods available. For more demanding environments, such as those involving ground contact or marine exposure, other treatments like CCA or LOSP may be more appropriate. Each treatment has its specific advantages and is suited to different environmental conditions, so be sure to choose the right one for your project.
The Role of the NZTPC and WOODmark®
The NZ Timber Preservation Council (NZTPC) plays a crucial role in ensuring that timber treated in New Zealand, regardless of the treatment method, meets the highest standards of quality and safety. Treatment plants that adhere to these rigorous standards can become licensees of the WOODmark® brand, a recognised sign of quality timber.
Guidelines and Health and Safety
To qualify as a WOODmark® licensee, treatment plants must follow strict guidelines for treatment quality, ensuring that the timber is treated effectively to protect against decay, insects, and other environmental factors. Additionally, these facilities must comply with stringent health and safety regulations, protecting both workers and the environment during the treatment process.
Compliance
Licensees and operators of treatment plants can find more information about compliance with the Hazardous Substances & New Organisms (HSNO) Act here, ensuring that they meet all legal and safety requirements.
Always Look for the WOODmark ®
By choosing WOODmark® branded timber, you can be confident that the wood you’re using has been treated to the highest standards, providing long-lasting durability and safety for your projects.
Become a WOODmark® Licensee
NZTPC welcomes new WOODmark® licensees and is dedicated to supporting and nurturing the community.