Just had my sidewalk pathways slabjacked to lift and slope them away from the house, now turning my attention to the basement itself. Not sure if there is an exterior parge on the walls, and I am getting efflorescence on the lower foundation blocks inside. I picked up a product called Dry-Lok (concrete waterproofer), just wondering if anyone has had any experience with it, and whether it will do any good. (I'm hoping that the existing moisture in the block is to blame for the efflorescence, otherwise this is pretty much a moot point.) Also, any tips on framing a bulkhead around existing ductwork and piping would be greatly appreciated.