I've posted about this ongoing issue in the past about my chimney leaking. It's an all brick chimney (including the part that goes underground), on the side of the house, and as far as I know the original from the 50's. The base of the chimney (the ash clean-out) is about 2 feet below ground. During really heavy rains (say 2-3 inches in a day), the base of the chimney takes on water and begins to fill up. Once the water reaches about 1 foot deep it spills through the clean out doors into our basement. In troubleshooting this issue we've had the chimney capped, bricks sealed (ChimneySaver), and flashing redone. I also dug out around the base of the chimney (to the slab it rests on) and did two coats of foundation sealer and wrapped it in plastic. These steps have worked very well (no water during the last few storms) until the storm we just got on Thanksgiving. We got about
3 inches of rain and about 2-4 inches of water still managed to get in there. No water seems to get in until the ground gets saturated (at two inches of rain both the sump and the chimney were bone dry, then between the 2.5 inch and three inch mark both the sump and chimney start to show some water. Now I have a few questions....1.) Where is the water coming from? Is it seeping up from the "floor" of the clean out (if so why doesn't water seep up into my cellar window well that goes one foot below grade? Could it be getting in through the seam where the brick of the chimney meets the foundation? When I did my sealing job I couldn't get to exactly where the chimney meets the foundation on one side due to the fact that it looks like they just dumped the extra cement there as there was a huge hardened blob there.
2.) I think this problem is beyond what I can do myself and I need to call a pro to evaluate. Would I call a basement waterproofing company, a chimney company, or foundation/mason? Do any of these companies offer a warranty (I'd hate to throw a lot of money into solutions that won't work).Thanks for any suggestions!!