Thanks Lisa. Yes this is my fist build I am very happy with it. I've had a huge amount of help from people on this forum including deranged chipmunk who has posted on this thread.
Yes my base is chunks of 2" insulating foam (that pink dense stuff) cut into chunks, carved a little with an heavy duty Olfa knife (be careful I got stitches twice so far on this project) then hot glued together. I covered I with mortar with I mixed really thin and painted it on it about 3 layers. But instead of mixing the mortar with water I used acrylic fortifier. I did this because I was told it will help the mortor resist water. I still plan on sealing it with drylok. If u have anymore questions feel free to ask. Every thing I know I learnt on this forum during this build. Thanks again