I know that many of the sheds / Workshops I have "inherited" along the way had asbestos roofs. the strength, sound and water proof capabilities are hard to match and then I found concrete fiver boards. Southern sheet supplies down by Gatwick sell then cheaper per m2 than the bitumen boards and they will last for years....
Sorry Just realised that sounded like an advert.
Sorry Just realised that sounded like an advert.