Homeowners can stay home during the process, with the only real bother being skip bins in the driveway and some noise created by workers on the roof. The result is a robust, well-insulated and airtight roof. Concrete and terracotta tile roofing are Class A fire rated. The workers carefully place the insulation blanket to cover all roof areas and create an airtight roof space.įinally, the Colorbond roof sheeting is installed, and screws are put in to secure it. Tiled roofs have been tested and pass the requirement of AS 3959-2009 for fire zoon construction. Once the metal battens have been installed, the next step is cutting and fitting the foil-backed roof insulation blanket. Original timber tile battens remain but no longer serve any purpose on the roof. The battens serve as the fixing point for the new Colorbond roof. The roofing contractor will usually try to place large skip bins as close as possible to the roof’s edge to allow the workers to throw the old roof tiles off the roof and straight into the skip.įollowing the tile removal, the whole roof is framed with metal roof battens installed every 900mm. The roof replacement is a simple process and often takes around one week or a little more. At this point, a roof restoration is not a viable or possible option for the terracotta roof, and the only option remaining is a total roof replacement. The fretting process of terracotta can not be reversed and will deteriorate as time passes. While in Europe it is common to see terracotta roofs that are hundreds of years old, it’s likely the different clay types that were sourced from various geological sites that ultimately lead to varying lengths of serviceable life in tiles. Indeed, some roofs show significant fretting when not even 40 years old. Coastal conditions accelerate the fretting process in many terracotta roofs. Once fretting has started in terracotta tiles, they become so brittle that they are no longer trafficable and will break and crack if walked upon. While fretting in its later stages can be easily spied from the rooftop by visible chips and chunks of missing tile, it will be most prevalent in the laps of the tiles, the areas where one tile covers another. The tiles tend to emit orange residue into the roof space and slowly leave terracotta dust and chips to collect in gutters. Fretting describes the process of a tile crumbling and breaking up, returning to the clay from which it was made. Of the thousands of Australian roofs clad with terracotta, many encounter the problem of fretting.
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