MESH MADE IN ORANGE NSW
Bitumen dipped or galvanised pickets? Compare the exposure first
A finish is part of the specification, not a colour preference. The useful question is what protection is documented for the places the post will actually sit.
The short answer
Compare the stated coating system, the soil and moisture exposure, and the evidence behind any durability claim. Do not assume a universal service life or that a black bitumen-dipped post is the same as galvanised steel with extra bituminous protection.
One post has several exposure zones
- Above groundWeather, atmosphere and coating damage
- Ground interfaceA changing wet/dry environment
- Below groundSoil conditions, drainage and contact
The Galvanizers Association of Australia treats soil exposure separately from atmospheric durability. That distinction matters: a coating table for steel in air is not a direct forecast for the buried portion of a picket. Local drainage and the ground interface deserve attention.
Ask what the finish actually is
| Bitumen-dipped product | Galvanised product |
|---|---|
| What is the base steel and documented coating system? | What galvanising process and coating information are documented? |
| Is zinc protection also specified, or only the bituminous finish? | Is any additional protection specified for the exposure? |
| What handling or repair instructions apply if the coating is damaged? | What handling or repair instructions apply if the coating is damaged? |
| What tested or warranted claim applies to this exact item? | What tested or warranted claim applies to this exact item? |
Do not fill gaps in one listing with information from a different supplier’s product. A claim for galvanised structural steel with an additional coating does not prove the performance of an ungalvanised bitumen-dipped picket.
Compare the premium against the actual job
Use the same height, section and quantity when comparing prices. If you are changing both the finish and the section, you cannot attribute the whole price difference to galvanising. Include the difficulty of later replacement: a readily accessible short division and a remote boundary may lead to different priorities.
Use current like-for-like quotes, with delivery and quantities treated consistently. A premium is a cost difference—not a proved lifespan benefit.
Coating choice record
Print this page and fill in the blanks. Keep it with your photos and quote.
- Post height / section / role
- ________________________________
- Soil and drainage observations
- ________________________________
- Coating specification for each option
- ________________________________
- Relevant evidence / warranty scope
- ________________________________
- Like-for-like order totals
- ________________________________
- Reason for choosing the finish
- ________________________________
Inspect rather than assume
Record representative locations and check them during fence inspections, especially damaged areas and the ground line. That gives you evidence from your property over time. It does not justify scraping or disturbing coatings unnecessarily, and visible appearance alone cannot establish the remaining strength of a corroded post.
Before you leave this guide
Choose on documented coating, exposure and the cost of maintaining this fence. Avoid an unsupported promise that one finish always lasts a set number of years longer.
Compare the picket specifications
Use the actual section, height, finish and pack quantity on each current listing. Keep the installed requirement separate from any spare stock bought in a pack.
View Outback PicketsSources & scope
-
Galvanizers Association of Australia — coating durability
Atmospheric coating durability; not a forecast for every picket. -
Galvanizers Association of Australia — galvanized steel in soil
Buried steel and ground-interface conditions require separate consideration.
This is an Outback planning guide, not a site-specific installation specification. Manufacturer references explain the subject; their branded product dimensions and methods are not automatically specifications for Outback products.
Editorial review: September 2026. Outback links identify our own product information. External sources are independent references, not endorsements. Product prices, availability and order quantities are shown on the current listings or your written quote.