Tin is lightweight and highly versatile, making it the ideal choice if you want to build a curved or irregular shaped roof. However, it does lack the lifespan and visual appeal of tiles.
Tiles, on the other hand, can last as long as 50 years and look stunning, particularly terracotta tiles. Tiles also win out when it comes to heat regulation - they absorb heat during the day and gradually release it during the night.
That said, tiles are not without their drawbacks. They are exceedingly heavy and need to be placed on a pitch angled between 18 and 22 degrees, unlike tin roofing which can be placed at a variety of angles. Concrete tiles can also loose their colour over time as usually only the surface of the tile is painted.
If you are purchasing a home with the intention of knocking it down to rebuild later, there is yet another factor to consider, namely disposal of the roofing materials.
Due to its light weight, tin can be left on the structure during demolition, requiring minimal labour. Unlike tin, tiles must be removed before the demolition of the structure can take place. Tiles can be recycled, however removing them in tact is tedious and time consuming.
If your house has fibro cement shingles on the roof there is a chance that they could contain asbestos. Asbestos fibre shingles are often mistaken for slate, and like other asbestos products they need to be carefully removed by trained professionals. Unfortunately this is where things get a bit complicated; in addition to the price of hiring professionals to carefully remove the shingles you also have to pay for the cost of asbestos disposal - roughly 30 cents a kilo.