drainage for shop slab: Wisdom of french drain?
Hi. I am building a pretty well built insulated shop on a slab in zone 4a.
Do I need a french drain or will surface slope be very adequate for me.
built on high ground.
2″ of foam and radiant heat.
4″ of gravel
Graded slope 6″ in 10 ft
Rain gutters diverting rain on roof to bottom of steep side (3ft drop below slab level).
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