Its pretty good for not sustaining a fire but when it really flares up,it burns.Of course,if you look at the twin towers,aluminium was burning very bright and was one of the factors that brought the towers down.
Even fibreglass roof insulation which most of us have in the roof,will burn fiercely in a big fire.
So many things can burn in a building,and remember,we have a whole lot of petrol in our garaged bikes so they are the number one danger.
I just hope my garage does not catch fire or the insurers may have 4 bikes to pay for.
Going to give my insulation a blowlamp test so its a good thread Hampy.