Hi all, sorry for the long post but hoping to get some advice. Ive got a garage type building at the bottom of my garden with the car entrance bricked up. I have recently trained as a florist so am trying to turn it into a design studio. I made some changes last year and put some work stations in etc but all this bad weather has left everything inside ruined. Even though i cant see holes in the walls, the water is seeping through and all my shelves and flooring is damaged. There is a lot of condensation. I know in the summer it will get better but im hoping to do something in the spring to prepare me for next year so everything doesn't get damaged again. Does anyone have any ideas on making it water tight? I would like to do it myself if possible but dont know where to start. Thanks in advance ☺️