Waterproof mortar joint for stone stairs

[frekth]

Hello,
We have issues with water seeping in from our old stone staircase (see images). A roof over the landing would be desirable but is difficult to implement due to the window. I thought I'd start by trying to make the staircase joints tighter. Can anyone recommend a good sealant for the purpose? I also gladly welcome ideas for roofing solutions (that fit the house)...

 

[Tooompaaa89]

Hello,
We have an issue with water seeping in from our old stone staircase (see pictures). A roof over the landing would be desirable but is difficult to manage due to the window. I thought I'd start by trying to make the joints of the stairs tighter. Can anyone recommend a good sealant for this purpose? I am also grateful for ideas about roof solutions (that suit the house)…

Is the entire staircase leaking or just the joints?
Ardex has good products for repairing stairs.
When it comes to sealing, you need a high-quality outdoor movement joint sealant.

https://www.essve.com/sv/essve-guider/lim--fog-guider/proffsguide-fog/kopguide-foga-utomhus/

 

[mexitegel]

You can start by treating the joints with water glass instead, it's both cheaper and significantly less work. Water glass is a product that penetrates and reacts with the lime, creating a hard and essentially waterproof surface.

I just have to add that it's a very beautiful staircase .