Exterior waterproofing of foundation wall and footing
We’re getting to the point of waterproofing the exterior of our foundation and installing the french drain. The waterproofing is going to be one of those sprayed on membranes.
Typically I see pictures of the french drain placed outside of the footing at the same level as the bottom of the footing. However I’m being told that the new way to do the french drain is to sit it on top of the footing. The reason being that if water ends up sitting on top of the footing it has nowhere to go and has more chance of penetrating into the house. They’d still fill gravel around the outside of the footing and above the french drain.
The other thing I was surprised at is they tell me they only waterproof the wall down to the cold joint between the wall and the footing. I’m surprised they don’t waterproof the seem between the footing and the wall. Won’t water seep in between the joint even with a capillary break?
Luckily I insisted on a painted on capillary break between the footing and the wall and secondly my interior slab is at least 1 foot higher than the top of footing.
1) Is it okay for the french drain to be on top of the footing?
2) Is it okay for the joint between the footing and wall not to be waterproofed?
Our soil is very dense and clay like.
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