Seth Marshall wrote:Hi, could you please explain why this doesn’t matter to you because you’re on a hill? Thanks
Mike Jay wrote:I used extruded polystyrene. I think I heard that expanded will let water through and isn't as good for below grade. Hopefully I didn't get that backwards. I looked for a while for a greener alternative.
Seth Marshall wrote:
Charli Wilson wrote: I used EPS- expanded polystyrene (it goes down 3ft below the ground level). I couldn't find anything else that would survive being constantly wet and still be insulative, and that I could afford.
Thanks, not knowing much about this product I always assumed it was a “green” choice. But this website makes it sound very environmentally friendly. https://insulationcorp.com/eps/
Would the normal closed cell foam option not be as suitable or environmentally friendly? I’m concerned about it breaking down in the soil, do you use something to back against it?
I was intrigued about the use of the expanded clay to “insulate” inside French drains. I had only heard of people using rocks for this.