mknauss, it's a concrete pool but isolated, keep water warmer... saving energy and I beleive it's easer to build as DIY project. Here in my own region (Gatineau,Quebec,Canada) we using Nudura product. I did a one day training with Nudura cie. The ICF is made to build house, garage or any kind of building ... It's like lego blocks and you fill them with concrete ....