Mmmk, so i got this situation;

part will be new wall, part existing old wall. old wall probably has pretty crappy condition tar on it. need to get new waterproofing on, attach xps to that, and water barrier over the whole thing.

sounds simple right.... well if it does to you, you must know something I want to know! lol.

I'll be doing this myself, and on a very limited budget, so i need to know what to use, how to use it.

so far, my thought pattern is something like this;

1. Have no idea what to use here for the actual waterproofing of the block... Asphalt will crack if wall cracks, don't like that. So figured maybe rubber coating or something, but what? how much does it cost? can i affix the foam right to that, or should i use fasteners? what to i seal around the fastener holes with?

2. do i need to waterproof where the block meets the footing? or is water at the footing level ok?

I think i just had an epiphany

So if i didn't have the footing all sealed up tight, and the water table was high, even if my wall was holding the water out, the water could come through from underneath the footing and floor, is that correct? That seems like it would suck awful bad. Obviously that is what the drain tile is for, along with the sump, however, if those worked all the time, no one would ever get hydrostatic pressure on a wall though would they? Ok, im lost now...

3rd thing was supposed to be how to i affix a real water barrier to the wall, how and where should i attach it on the bottom, and with what? and what should I use? was thinking 6 mil poly as it is cheap.