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Have you a question that needs answered? Does a similar question to yours appear in the list beneath? Please browse the list of questions posted below to find the answer. Click on the question to view the response from Mitre 10. If you cannot find the answer and you would like to ask our experts a question, please click the Send Mitre 10 Your Question button below.
 
ASK AN EXPERT BULLETIN BOARD
CD versus DD graded Plywood
H3 and H4 Timber treatments CLOSE RESPONSE
 

Hi, What does the H3 or H4 on radiata pine mean?

  Response from Mitre 10: Radiata pine has different preservative treatments according to the environmental hazard that it comes in contact with. For example:
H1 = Low decay hazard. This includes timber used for framing, interior lining and trim.
H3 = Moderate decay hazard. Timber is exposed to weather but not in ground contact. eg. Fence rails.
H4 = A high decay hazard. Timber is exposed to the ground and fresh water. For example: sawn timber, fence posts, retaining walls, horticultural poles.
H5 = Severe decay hazard, eg. building piles and poles
H6 = A marine hazard or water immersion, eg. marine piles.
This is a guideline of the hazard classes and the appropriate preservative treatment required. If you are in any doubt about which treatment you require, please contact your local Mitre 10 store and ask for advice.
 
Painting weatherboards with rusty nails
Staining a wooden deck
Killing lichen and moss
Laying pavers
Cleaning exterior concrete Patio
Staining the Exterior of our Cedarhouse
Painting a Rusting Corrugated Iron Roof
Painting concrete driveway
Building a deck over a concrete slab
Building Wooden Steps
Painting fibrolite cladding
Cleaning moss off tiled roof
Backfill a deck
Cleaning brick wall
Erecting Shade Sail
Repairing an iron roof
What side do i lay decking timber ?
Difference between Kwila and Hardwood
How to build a timber gate
Preparing exterior joinery for painting
Dusty concrete pavers
Efflorescence on concrete Blocks
Tips on Staining
Removing rust stains on concrete patio
outdoor art mural
30 seconds on fence with grapevine
Reparing cracked handrails
ugly retaining wall
fixing pothole
Painting on garage floor
what would i use to cut coragated iron
pros and cons paint vs. stain for a wooden paling fence?
 
 
  Limitation of Liability
The information provided here is a general guideline only, based on the limited information that had from your email, and is not intended to be an exclusive solution. There may be other options and products available that are suitable for your purposes too. Please discuss your product requirements with the experienced staff in Mitre 10 stores. Always adhere to the manufacturer's directions and precautions when using their product. Check with your council that you comply with the local body bylaws that pertain to any construction project and consult a qualified tradesperson where expert services are required.
 
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