Yes, it is possible to clad over or cover an asbestos roof. Technically, you have two options: either you could coat the roof using a special coating system and it will seal all the fibres, or you could over clad using steel.
There are flaws and advantages of both options. The coating cannot be done on a broken and damaged roof but if the roof is in okay condition, then the coating can be applied and it will be cheaper and low risk.
Over cladding is not only more expensive but you also have to drill holes in the previous roof which can cause the asbestos particles to be released into the air. Moreover, over-cladding an asbestos roof might buckle the foundation since it was not constructed to be strong enough to sustain steal. But it is long-lasting, durable once done properly, and is more weather resistant.
Your options will depend on the condition of your roof, as one customer stated, “I have recently had the garage roof replaced on my managed property. It was an old asbestos roof that was leaking in a number of places and was advised due to the material and age to replace rather than repair .”