Hi I have an outbuilding attached onto my house. It's a 1960s style. At the moment it's just brick with no plaster ect on it. I'm wanting to use this as a storage room but I'm on a very tight budget. I'm wanting to damp proof it although it is showing no signs of damp at this moment in time.

How would I be best to wash down the walls which are full of cobwebs could I use a jet wash or would this not work?

Would it be possible to put tanking slury on the walls and then put plasterboard over the walls to make it smoother but not plaster over it?

Any other ideas are welcome

Thank you 😊