I see the drilok product but Basement systems makes a good point that the tdimples would hold water if the basement flooded. Or should I expect the tiles are so waterproff that water never makes it into the top side of the dimple and would act as a bowl?
I can't believe that BasementSystems or whoever the maker of that product is so oblivious to the money to be made from the Do It Yourself market.
Other than the availability of the DriLok tiles I do like the R value factor.