Front Door Stone Step

[James Turner]

I have a stone step that the front door sits on. Since it has got cold there now loads of moisture coming through it (assuming condensation). Is it possible to replace this slab to prevent this or is there anything that can be done to prevent this water coming through?

 

[EddieM]

Easiest way is maybe grind out a channel and fill with suitable mastic.

 

[James Turner]

Thanks. Would a clear silicone work?