The hidden nature of asbestos often requires expert intervention in order to properly identify and dispose of it. If left undisturbed, asbestos roof tiling can sit harmlessly and pose a minimum health risk and so one may not know of its presence until health complications arise. Furthermore, these tilings are rather generic looking and there is no single identifying colour or shape that one can spot at a glance, nor are the characteristic fibres visible to the naked eye. There are some factors that could point to the presence of asbestos such as the date of construction of the building in question, particularly if it was erected between the 50s and 90s. Roof work was also a very common application of asbestos due to its durability, particularly for outside garages.