MarkGee

I believe the back wall is tanked in some way behind a stud wall. I've seen a portion of it when ripping out other parts. Some good news is appreciated!

I just knocked this up in excel. So this is side on. I imagine it's rain water hitting the sandstone on the road above/any damaged drains. The wetter the weather, the worse it is.

Yeah, I want it exposed for a bit of both of those reasons. It's a retail unit in a conservation area and I'd like it to be as close to what it originally was as possible. The previous owners had covered the walls on the ground floor with what looks like a skim of concrete and a dpm but it just moved the damp elsewhere. Any chemicals worth considering or just hefty ventilation and a pump? Thanks

There's an adjoining building unfortunately.

Unfortunately that wouldn't be practical due to the usage of the building. The front of the cellar has no issues as that is brickwork from all the tunnels etc in the area. You can see from this image that it's brick on the left but the sandstone starts just after the chimney breast (behind the block work), and steadily gets higher as you go towards the back of the building. So on the ground floor, the floor joists at the rear are sat directly on top of solid sandstone.

Hi all, I've got an interesting damp issue and I'm hoping someone might have some advice for me. I have a property where the cellar is carved into the sandstone bedrock and around 1 -2 meters of the ground floor walls are also carved out of the rock. The sandstone is incredibly porous so the air is damp but I also get water seeping out onto the steps into the cellar. Any advice on how to tackle this? I don't want to put a dpm over the walls, as I'd like them cleaned up and exposed. I had what is probably a stupid idea. If I cored a 32mm wide hole into the wall by the steps and slid in some 32mm waste pipe, would the water take this easy route? I could plumb that into a drain. Other that that, all I can think of it good ventilation and a sump. Cheers M