nail holes in fibre cement slates - do they cause staining??

[des606]

Hello,

Can you tell me if holes drilled in fibre cement slates, for copper nails/crampions will cause staining via the rain washing cement powder down the roof.

In some slates I'm using I've had to drill holes which end up being unused , will these holes cause more cement staining?

Cheers

 

[SurreyRoofingEstimator]

If you have cleaned away the dust created I wouldn't have thought so as that's how the holes are put in in the first place

 

[justlead1]

Hi you will get staining if you allow the asbestos slates to get wet when they are stacked together for any period of time.