Drain tile – Slab on grade
I’m building an elevated slab on grade house. I am elevating the slab about 3 ft. above grade and using simple frost walls for the foundations. The site is very flat and does not have any obvious ground water issues.
I’ve dug two test holes (4 ft. deep), once last fall and one this spring and there were both dry. Is a drain tile required or highly recommended in a detail like this? I am not able to pitch it to daylight if a drain tile is located along side the footing.