i have a cold room, and it tends to leak sometimes, and i want to waterproof the outside foundation. The cold room was an add one but wasn't waterproofed. i have some kind of idea of how to waterproof would need some help how to do it properly. I know i need to dig up the foundation on the outside. But im not sure what the rights steps are for waterproofing.
Im guessing you need to put some waterproofing tar on the concrete, then some plastic sheet, then put that membrane?
I would be really thankful on which steps i would need to take to waterproof the foundation.