Do I need to retreat jet washed sandstone steps

Question

I have stone steps up to my front door (it’s a Victorian terrace). They were jet washed over the summer. Since then I have noticed a leak in my cellar, underneath where the steps are. Do I need to “seal” the steps in any way to try and stop this. I think they are either limestone or sandstone - either way they look porous, with lots of little holes in them.

Barry · Accepted Answer

this is the problem with sandstone it is porous and you have to be careful certain chemical s react

Andy · Answer

Repoint the slabs.  If this doesn't solve the issue, I'd suggest getting a builder to help locate the issue.

Gary · Answer

Problem would most likely be joints not tiles or slabs

Dylan · Answer

It sound like the jet wash was to harsh and sting for the joints.I would recommend removing all the old joints and repointing them in compacting it in with a finger trowel to make sure all is full then joint to finish. Then paint over some sealer if you wish for extra protection.

Nikolay · Answer

in my opinion, everything will be temporary, it's better to remove the step, put a membrane and make a new one with the same tiles, maybe with others, but there must be a membrane below

Joe · Answer

More than likely you have washed out most of the Sandstone Joints especially as you Jet-washed your steps…You basically need to re-point all joints and when gone off re-seal with a clear sealer…

Do I need to retreat jet washed sandstone steps

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