ways to water proof underground rooms?

Answer 1

Jack, no lie, I've been at it for too many years and I've cracked the code. The product is a group of urethane sealants that are the absolute bomb! Don't take my word for it...do your own research. www.sanitred.com

Answer 2

First, make sure that the water is being properly moved away from the house. If it is settling in a pool of water against the basement wall then water is much more likely to seep into the underground rooms. Make sure that you have clean gutters with a solid connection to the roofline. Downspouts should be firmly attached and dispense the water away from the house. Soil should be graded so that it slopes away from the house at least 1/4" per foot of distance. Once you've done all that, you may not need the sealants. As someone already pointed out, you would need to dig up around the basement in order to apply it to the outside anyway - a very difficult undertaking.

Answer 3

There are several good waterproofing formulas on the market, and any one of them will do the job if properly applied. THE TRICK and what many people don't seem to grasp is that whatever waterproofing you apply usually has to go on the OUTSIDE of the area being protected, so that it creates a barrier between the structure and the water in the ground. Applying waterproofing to the inside of underground walls will only result in water-filled "blisters" on the walls that must in time rupture.

Answer 4

Tremco's 250GC (for green concrete) or Tremproof 201R ( roller grade). - liquid applied below grade waterproofing

or you could install WR Grace's Bituthene 3000 ( peel & stick ),
with mastic applied on the overlaps.

You could use Cetco's Voltex ( a mechanically attached, rolled barrier )
Or just hire a professional restoration/waterproofing contractor , who will do it right.

Answer 5

There is a paint called DryLock that seals the wall from water. It is available at the Home Depot.

Answer 6

latex sealer in thick heavy coats

Answer 7

drylok is a good product.