Are these aesbestos slate tiles?

[Chanpreet2675]

I just wanted to know if these are aesbestos slates, we cleaned the roof this white stuff came out. 

[Chanpreet2675]

[Conor]

You'll need to get a sample tested.

[Redbeard]

+1 to @Conor's answer. I am not aware that the physical appearance of later 'non-asbestos-cement slates' differed at all from AC 'slates', so get a sample tested. Usual precautions when taking the sample, but then lots of 'mail order' services available. In the past I used to get an asbestos surveyor out to take the sample and send it for testing. This removed me from the equation and in my view, from the point of view of PPE, (see my username!) was worth paying for.