Drainage and/or waterproofing for stem walls
I am planning to dig a trench around a garage (stem walls with interior slab on grade) to install some EPS foam.
The soils are clay heavy.
Would it be worth:
1) Also adding drain pipe next to the footing with crush stone, geo-fabric and sand back fill thereafter? NOTE: the garage is an attached and is slightly uphill of the house, which itself does not have exterior drains. So my thought is that, at the least, this may help divert some water from the house which has a basement.
2) Also waterproofing the concrete.
My inclination is yes on number 1, and no on number 2 (since they’re just stem walls, no basement), but what do you all say?
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