What is the difference between H3 and H4 treated timber?
What is the difference between H3 and H4 treated timber?
The ‘H’ denotes the level of treatment and what the treated timber can be used for: H2 protects against termites and is for inside use only. H3 protects against termites and wood rot, and is for outside, above ground only. H4 is for outside, non-structural, in contact with ground, such as posts and garden edges.
Is H4 timber treated?
H4 Treated timber for use in exterior applications, whether it be decks or pergolas, is pressure-treated with a water-based preservative called chromate copper arsenate (CCA). When the treated timber dries out it may form a solid, crystalline structure that may not make the wood rot or warp.
Can you use H3 timber outside?
H3 Treated Pine (ACQ treated) is ideal for a variety of above-ground outdoor applications such as window & door trims, playground construction, handrails/newel posts, pergolas and picnic tables/seats etc.
How long does H3 treated pine last underground?
around 30 years
H3 Treated Pine in Ground This is the type of pine most often used for fence posts, landscaping timbers and pilings. Expect H3 treated pine to last around 30 years in the ground when installed with pressure-treated screws or stainless steel post brackets.
Can you use H4 treated pine for garden beds?
Best timber for your raised veggie gardens You will need to buy timber rated at least H4, but H5 and H6 provide more protection (H6 is rated for below-ground use and is recommended). One of the most popular materials used for raised garden beds is timber, with treated pine being commonly used.
What is the difference between H3 1 and H3 2?
1 was developed as a dedicated ‘cladding treatment’ class, and H3. 2 continued for external structural timber not in ground contact. The discontinuance of H3. 1 as a framing treatment allows it to revert to its original purpose as a cladding treatment class.
What is H3 timber treatment?
*H3 The minimum level of preservative treatment required to protect the timber from attack by decay fungi and insects, including termites. H3 preservative treatment offers protection in situations above-ground, exposed to the weather or periodic wetting.
Can H4 timber go in ground?
H4 treatments are suitable for use in situations where the timber is in contact with the ground or is continually damp. H4 is appropriate for less critical ‘non-structural’ applications and/or where the decay hazard zone indicates a lower in-ground hazard.
Is H3 treated pine waterproof?
Environmental conditions that this type of treated pine can sustain is leaching and moderate, occasional wetting. This means that your H3 treated pine decking will hold well under the rain, unless it rains all the time, which is not the case in Australia.
Can you bury H4 treated pine?
H4 treated pine decking is safe for both above and in ground uses. H4 means that the timber is treated in a way that allows it to be used for most outdoor projects.
Can you burn H4 treated pine?
Burning treated timber releases toxic chemicals. Never burn treated timber or treated timber waste in outdoor fires, stoves, fireplaces or in confined spaces.
Is H3 treated pine toxic?
This treatment makes the timber highly resistant to pests and fungi but it can also be toxic when handled or burnt, and should never be used for household building or renovation. If the timber is burnt, however, the smoke and ash contain high concentrations of arsenic.
Can H3 treated timber be used on the ground?
Placing H3 treated timber on or in the ground could subject it to conditions that will cause degradation. H3 pine timber is perfect for verandas, cladding, and other above ground purposes.
What does H4 mean on timber?
*H4 The minimum level of preservative treatment required to protect the timber from attack by insects, including termites, and severe decay. H4 treatments are suitable for use in situations where the timber is in contact with the ground or is continually damp.
What is an H level timber treater?
N.B. Currently, the heartwood of most hardwood timbers and some softwood timbers cannot be treated to this level of protection. The timber treater is to ensure that their process has achieved the required level of penetration to meet the stated H level specification.
Does Blacktown sell H3 and H4 treated pine?
Our full selection of H3 and H4 treated pine includes a wide array of board sizes for your purposes. From posts to timbers, we have a full stock of pine for you. We serve as Blacktown’s first choice for building supplies and materials.
