[calgarywinning]

Originally Posted by Shin Pad

You should absolutely have some sort of vapour barrier below the slab. If you don't, the moisture from below the slab migrates through the concrete and it will delaminate the epoxy finish. I would recommend using something better than poly. Look at W.R. Meadows "Permanator" or Stego Industries LLC "Stego Wrap". The both come in 2 thicknesses - 0.25 mm and 0.38 mm. If you are using an epoxy finish, you should go with the 0.38 mm. Make sure you install it in accordance with manufacturer's recommendations - ie - termination seals, penetration seals, joints, etc. It will be more expensive than poly, but if you don't want any delamination problem, then you should consider a product like one of these. In the overall cost of the slab, it will be a minor expense.

How do you mitigate after the fact?