11:32AM | 02/13/99
How can I waterproof my granite walls in my basement. The stones are not finished, so I have plenty of stone shelves and valleys. I feel like the dutch boy holding back the dam when it rains, I have leaks everywhere. Can I spray/paint a masonry waterproofing material over the stone? My house is over 150 yrs old. Or at this point should I just live with it??? And I do have a cement floor in my basement-not dirt,haha!!

Carlton Smith

12:18PM | 06/17/02
Member Since: 06/16/02
1 lifetime posts
I have the exact situation with a 120 year old house.
Saw your email and wondered if you got any answers in the meantime, I know it has been a while since you posted.
Thank you very much,
Carlton Smith


02:43PM | 06/18/02
The only way I know of that will actually work involves excavating around the outside walls down to the footing, cleaning the stone (power washing the best way), filling all voids around the stones with mortar (making a fairly smooth but not necessarily flat surface), then applying a good waterproofing. While the excavation is open it will also be a great help to install a French Drain around the foundation at the footing.

Glenn Good

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