Metal Roof Replacement

 New Colorbond Roof Replacement

Metal roof replacements in COLORBOND® is becoming a popular re-roofing choice for Melbourne home owners these days. Some of the key benefits of a COLORBOND® roof include its durability, anti corrosion properties, and its long lasting colour. There are many styles to pick from, ensuring that you will find the perfect roofing solution for your home.

A common question that people with an old metal roof in need of maintenance ask themselves is: “Should I simply undertake minor roof repairs, replace the roof with new COLORBOND®, re-roof with new Zincalume or should I have a roof restoration completed involving rust neutralizing, pressure cleaning and re-coating. It can be a very difficult decision to make.

Firstly you must consult a professional. Because Guardian Roofing specializes in all options for roofing problems, our expert tradesmen will give you the facts and offer you un-biased opinions. Secondly, all of the above solutions have their own advantages. There really isn’t a simple answer and it often comes down to working out which option best suits you.


Short History

When metal roofs get to a point where they can no longer be repaired, they are in need of a complete Re-Roof. Many years ago, as far back as the late 19th century, all galvanized corrugated roofing sheets were made from wrought iron. The process of galvanizing requires the sheets to be hot dipped in molten zinc. From 1890 to around 1910 the steel making and processing methods got substantially better and as a consequence, Mild Steel replaced wrought iron as the material of choice. Galvanized Steel has a limited life span due to its oxidizing properties, and if not looked after correctly can corrode easily.

The manufacture and use of this galvanized steel product continued to be the only metal roofing material until about 1976. BHP had introduced a new coating to their product consisting of half Zinc and half Aluminum. They called this product ZINCALUME®. Galvanized steel is still produced today however ZINCALUME® is a much more widely used product. Both products are available in an oven baked, pre-painted finish which provides for much longer lasting durability and colour fastness.


Old roofing materials removed

After carefully deciding on your desired metal roofing product, including your gutters, flashings and downpipes and your choice of colour, it’s time to remove the old roofing material. A Job Safety Analysis (JSA) is completed prior to job commencement in order to facilitate the most assured and practical way to undertake the project. Safety railing is often a mandatory requirement before work starts. This is installed and the old sheeting and old guttering is removed from the roof in sections.

metal roofing during

Typically, a small metal roof can be striped and relayed in one day however a bigger and more standard sized roof would have to be done in two sections. A roof with tiles is usually a much more labour intensive removal project and requires more time. Most tiled roofs require two days to be able to throw off all the tiles and ridge capping. In some cases the tiles and ridge capping are salvageable and are placed on the ground for tile companies to take away, but for the most part, the tiles have seen better days and are of no use. The tiles are thrown into a large skip along with any unusable battens.  Any old flashings and valley irons are thrown out.

New roofing sheets installed

Prior to the new roofing sheets being installed, we will inspect the insulation foil under your old roof sheets. In most cases, it wasn’t common practice to use insulation. In current times, it is in the Australian standard and must be used. Having insulation under your roofing sheets stops condensation from building up underneath and leaking into your roof space. We then lay down the insulation paper and Re-batten where necessary in preparation for the roofing sheets. Ensuring that we use the longest possible lengths so long as practical to minimize any joins we lay the sheets. If the job is to be done in two sections, we make sure that the roof is left watertight at the end of the day. Any metal off cuts are taken away out of danger and placed in the skip provided. If the fascia boards are to be painted, it is recommended to be completed now while the gutters are off.


Gutters installed

Gutters, downpipes and valleys are usually installed at this stage.

Capping and Flashing installed

After the roofing sheets and gutters have been put on and roughed in, the capping and flashings are secured. Your metal roof replacement is now complete and a final inspection is carried out prior to certification.

Please visit for more information on re-roofing / metal roof replacements.

Providing top-notch gutter cleaning in Balwyn, along with professional roof restorations in Melbourne, colorbond roof restoration in Melbourne, roof restoration in Watsonia, roof restoration in Toorak, and roof seal in Melbourne services at Guardian Roofing.


Guardian Roofing Pty Ltd is your one stop gutter repair shop.

We have fantastic gutter solutions for every domestic and commercial need.

We specialize in Re-Guttering, Box Gutters, Flashings and Valley Re-Newels.

When choosing a new guttering system, or replacing your old rusted one, there are many options available.

We use only the highest quality, Australian made materials.

Please feel free to use the COLORBOND® Online Visualiser and then contact us to arrange for a free measure and quote. 
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