The three steps up to my front door are topped with black limestone slabs,
and I'm beginning to be concerned about their safety (or rather the safety
of anyone using them) especially in poor visibility: I'd like clearly to
mark the front edge of each step with a white or other light-coloured strip.
There are various commercial products available, both stick-on and
screw-down: see for instance this page:
http://www.stair-nosing.co.uk/standa...air_nosing.htm

My question is: would it be adequate to stick down such a nosing strip, or
should it be screwed? If so, is it practical to drill into a limestone slab
so close to the edge? The stuff does seem to chip quite easily. If
adhesive could be used, what would be recommended?

Or should I just paint a white stripe along the edge of the steps?

Many thanks,

Bert