All over the world really, AFAIU. And why not, it's non-flammable, rot-resistant, affordable and made from abundant raw materials.
And yes, you should probably use gloves and a mask when working with it, but it's not carcinogenic like asbestos.
And yes, you should probably use gloves and a mask when working with it, but it's not carcinogenic like asbestos.
It doesn't hurt that the treatment to make them non-flammable and rot-resistant is quite benine and that the demand much less energy to manufacture.