Corrugated galvanised iron sheets are the most common form of roof covering found in Queensland.
The common term ‘corrugated galvanised iron’ is used to describe two different materials—galvanised wrought iron and galvanised mild steel.
Early production of galvanised corrugated iron relied on imported sheet iron and it was only in the 1920s that large-scale production began in Australia.
Asbestos cement roofing is commonly referred to as “fibro” or “Super Six”. It’s an extremely hazardous material that poses risk to health by inhalation when the fibres become airborne.
After 30+ years of being exposed to Queensland’s harsh climate, asbestos roof sheeting is often left eroded exposing deadly fibres and putting residents at risk.
Asbestos was once an extremely popular construction material. It was an inexpensive insulator, and many manufacturers used the fibres in insulation, roofing, cements and other homebuilding items. Researchers soon discovered, though, that the mineral was carcinogenic, and the Australian government banned all new asbestos applications.
There was just one catch: older asbestos products could legally remain in place. Due to the associated health risks, the department recommends that owners use tradespeople who are licensed to carry out work on asbestos cement. If owners remove asbestos cement illegally or unsafely they may be subject to legal action including harsh ‘on the spot’ fines.
As possibly the most despised roofing material in existence, Decramastic roof tiles are pressed metal tile strips that were made to imitate concrete tiles. Produced from light gauge metal, it deforms very easily if walked on – often leading to roof leaks.
Concrete or Terracotta roof tiles are hung from the framework of a roof by fixing them with nails. The tiles are usually hung in parallel rows, with each row overlapping the row below it to exclude rainwater and to cover the nails that hold the row below. There are also roof tiles for special positions, particularly where the planes of the several pitches meet. They include ridge, hip and valley tiles. These can either be bedded and pointed in cement mortar or mechanically fixed.