• Faq's

Bunbury Colorbond Fencing Contractors

The importance of correct Colorbond fence erection in Bunbury.

The City of Bunbury is a major port and business centre of the southwest of West Australia and a hub of regional development. Located 173km south of Perth, Bunbury has all the major benefits of city-living commercial opportunities but has some fencing issues due to the different soil types.

The soil around Bunbury is predominately soft sand, plus there are also frequent coastal storms that cause so much damage to domestic fencing.
When fencing in Bunbury, the fencing construction must be engineered to withstand these factors.
Our minimum requirement for the hole depth is 700 deep by 300 wide, to increase the wind loading and help prevent fence failure.
Other factors such as the different locations in Bunbury, also needs to be considered, as some coastal property’s are elevated areas are subject to much stronger winds. This requires a greater hole depth and width to help keep fences upright when strong winds come. The force against a large are such as a fence can be huge.

Fencing on limestone retaining walls.

Many fences in Bunbury, especially in the new development areas like Dalyellup are erected on limestone walls and retaining walls. Our Colorbond fence installation are aligned using laser technology and we can achieve precision in core drilling ensuring a fence that is streamline and geometrically precise. These fences have proven to be the most reliable in harsh conditions.

Technical Specifications for the installation of Colorbond Fencing.

Although most Fencers are using Quick set concrete, or even rapid set mix for their post holes, going by the technical information (Boral cements properties and characteristics) there is only a minimal difference between the general purpose concrete, Quickset and rapid set applications. However with the slower setting applications, there is more time to ensure the water is thoroughly mixed with the concrete and ensuring maximum hardening. This is the application we prefer to use in the Bunbury area as, in my 15 years experience, has proven to be more superior.

In some areas of greater Bunbury (Eaton/ Australind / Dayellup), the soil types are clay and even some rock. The rule of thumb we use for correct engineering, is also illustrated on the Bluescope Colourbond website. (See installation guide page) which is;


300 mm hole.

Clay / firm earth;

600 mm hole with 2 bags per hole (20 kg bags)

Sand and loose fill:

900 mm hole, 3 bags per hole of 20 kg bags)

Colorbond fencing Structural Strenght

With regard to the structural strength of colourbond fencing, (in relation to the materials used.) Genuine Colourbond®, (which is genuine BHP steel, manufactured by BlueScope) has a thickness of .35mm. This steel is far superior to other non-genuine copies out there. Genuine colourbond is also well known for its anti-corrosion properties, as it has a base coating of Zincalume. We only use genuine Colourbond® BlueScope Steel on all our fences.

Another important factor to consider in the structural integrity of Colourbond steel fencing, is the amount of tech screws when screwing the panels together. These posts need a minimum of 6 screws each post, to prevent failure when the wind is loading on the panels. I have seen other companies using only 3 per post and have also witnessed fence failures with that sort of application.

The recent storms in the Bunbury region have caused so much damage to domestic fencing. It is our desire and challenge to meet these ever changing climate conditions and build fences that stand up to the severe weather that effects the coastal areas in and surrounding the Bunbury region.

Everyone of our fencing installations come with 15 years of experience.