Originally Posted by itsreallyconc
am curious why, when the area was excavated, it wasn't waterproofed w/roofing cement instead of water-permeable hydraulic cement OR mortar ? ? ?
dig it up again & do it right - finally
Good point. There is no hydraulic cement, roofing cement or other sealant around the chase. It is just a very loose fit through the hole that was knocked through the block. The general contractor didn't think that was the problem and was in a hurry to complete the porch over the area. He wanted to dig up the basement floor and install interior drain tile plus a sump pump, which I didn't pop for at the time. Needless to say, the porch will make digging the area up again more difficult.
It wasn't until I got my camera a week ago and we had some heavy rains that I could actually "see" where the water was entering the blocks.
As for the chase or sleeve, I assumed it was to prevent abrasion and it can be sealed reasonably well to the outside wall of the block, as you suggest.
How do you keep water from coming through the inside of chase though? Do you use expansion foam or just a lot of regular sealant for the inside? Should I drill holes in the bottom of the chase, so if water does get it, it can drain by way of the drainage stone that will be used for back-fill?