Then im doomed already!! I grew up working in a garage with an asbestos roof, my mum had an asbestos ironing board, and at school we used asbestos heat mats in Chemistry lessons.. These days, every day i go to work i stand under an asbestos cement roof of the trin station... Of course asbestos is a hazard, but its also a naturally occurring substance - you are likely breathing it in right now. Given that a very large number of garages were built with asbestos cement roofs, and the comparatively low occurrence of asbestos related illnesses, i would say that contracting lung cancer from doing DIY motorcycle repairs in a garage with an asbestos cement roof is pretty low... but yes, if you do decide to rip the asbestos roof off, wearing some PPE is a good idea!! In one respect you are on the right lines with the low risk but there is still that risk. As I've said before they still don't know if its just the one fibre that causes the problems or many Asbestos is only a real problem if its damaged or your work involves disturbing it As for asbestos being naturally occurring and your suggestion that we are probably breathing it in at the moment.............you need to know a bit more about where it comes from and how its produced to be able to make such a sweeping statement. So let me educate you just a little more Its mined and they have to heat the raw materiel to extreme temperatures to produce the fibres The production of asbestos products was banned in the UK in the 80's but the sale and use of products containing asbestos wasn't banned until 1990 Just be careful what you post in a public forum.............your words have the potential to mislead other less informed individuals and in this case the potential to put others health at risk. If you're wondering about my credentials. I am a degree qualified building surveyor and hold a P402 certificate in bulk sampling of asbestos The P402 has been superseded now and as I don't get involved with asbestos safety checks anymore and my employers don't insure me to take samples I've not kept up to date with the latest qualification Minimum I have to do these days is asbestos awareness