I have a old concrete panel garage that was built on a concrete pad. It wasn't particulary well installed and water seeps into into it through the door and the sides. I was considering building up the level of the concrete floor ending with a slope out of the front as part of the problem is the slope of the drive.
What mix should I use? (would a premixed brand be alright as I would probably be doing this on my own)?
What is the minmum thickness of extra concrete (I was hoping between 1 and 2 inches) and do I need to treat the existing surface (its pretty dirty)?
Would I need to leave expansion gaps around the edges?
Or is this a bad idea :(
The existing floor seems to be sound, I have not noticed any cracks.
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