I am setting up a new workshop in my garage. I need to address the state of the floor, before investing my hard earned cash in machinery It is 40+ year old concrete, which is dry and dusty in some areas, but with some very significant damp patches. I suspect it was laid without any damp proofing. I have done some research on the web, which has not been very conclusive. Most coating systems I have seen say don't apply if there is any damp present Does anyone out there have any experience of dealing with a similar situation? Any recommendations would be greatly appreciated for a cost effective method of sealing the floor.
Regards
Stuart