Addition - Full Basement Foundation next to Slab Foundation

[SkiOn1]

Hello - I am looking to put a full basement foundation (probably a PWF foundation) next to an existing cabin that has a slab foundation. How close can I excavate to the existing cabin? What are some things I need to consider for this project? Any help and additional information anyone can provide would be appreciated.

 

[BigH]

SkiOn1 - this sounds something like my "leap-frog" suggestion on June 5th. I was thinking that you do a two foot trench - only perpendicular to the wall. Can build the base slab a bit, then the wall and brace the wall to the slab. it will be a slow slog but likely may be doable - so why not try it out somewhere "away" from the cabin wall and see if the soil stands? You could consider this in the basement area. Secondly, we still have scant little information on the soils themselves - how dense? Just single sized sand - or well graded sand with some gravel, etc? This would help.