We have a decent sized garage that is broken down into a coupe of spaces built in the late 70's
The garage is a single skin brick construction with a DPC for the brick work. The floor is a concrete mix that is reasonably thick. The floor does not have a DPC as far as I am aware.
The garage floor level is above the height of the surrounding garden by a minimum of 2 courses.
When we moved in I painted most the floor in the main garage with an industrial type paint - I didn't seal it first.
Overall the paint has held up well but some salt(?) weeping has crystallised in places and peeled the paint.
I have a section of the garage laid with some of the halford's special floor matting.
Under a couple of areas there is a very small amount of moisture under these that appears trapped.
This does change as the weather changes and the floor is never wet to the touch but on the unpainted sections you can see a darkening of the floor.
The garage does have ventilation and a couple of untreated bare metal steel frames I have in there have no signs of any surface rust or any condensation on the widows.
Do I just leave it or try and address somehow?
im not sure how you can improve this unless you look at building a false floor and / or heating. following for better advise 🙂
If bare steel isn't rusting I wouldn't worry. What I did for my concrete garage floor with no dpc was waiting until it was totally dry in summer then two coats black bitumen paint. Outside I dug the earth away from around the base after that dried bitumen painted there then filled the space beside the wall with gravel.