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Do I have to have clear stone gravel in waterproofing if my foundation is made with stone and not concrete?
My house is over 100 yrs old and I need to waterproof the basement. One contractor has told me that the to add clear gravel stone outside of the dimple board is not necessary because my foundation was made with large stones/masonry and not concrete cinder blocks. He said that the stones are not porous like concrete blocks can be so its not necessary, I would just be wasting money on clear stone (gravel). The process he would do is, fix leaks, cement parge, apply a membrane sealer then add the dimple board.
Is this true? Can anyone give me some insight?
Is this true?
The house is so old that there is no weeping tile in place at the footing of the foundation either.
1 Answer
- NicholasLv 49 years agoFavorite Answer
The stone may not be permeable, but the mortar is!
the purpose of the clean stone is so the the water can permeate down to the weeping tile where it is drained away - if you have no drainage and are not going to install clean stone to drain the water, why bother installing the dimple board at all?
Installing the membrane and dimple board with no stone or drain tile would be like standing in a pool wearing water resistant boots . . . for eternity.
Eventually it's gonna leak, guaranteed!
Source(s): I am an engineer and own a construction company.
