Will lateral ground pressure or minerals of the soil effect Thermaseal?
No, with closed cell foam we pour concrete over it and then drive cars over it. With below grade foam there is very little pressure on a vertical wall. As far as soil Thermaseal is plastic and will last the life of the building. You can take the harshest of chemicals and it will not touch it including acid. You can melt it and grind on it other than that very little will touch it.
