A house I’m looking to buy has it’s own cave through the kitchen door. It’s built into sandstone and is therefore very damp. It’s around 10m deep, 2m high and 4m wide. It’s technically underground, but at the same level as the house.
I’m looking for ideas on how to:
Create a guttering/drain system to keep moisture at bay.
Tank it out in order to make a liveable space without the issue of damp walls and floors.
Keeping it ventilated and breathing
What to actually do with the space? (gym, bar, dining area etc)
All ideas/suggestions welcome.