I will be building a room that will extend from the yard out over the water. My thoughts are to use 4 inch pvc capped on the bottom and filled with concrete using a j bolt to anchor the building. I know I could use water pressure to place the pvc down in the soil but my problem is the pond was lined with clay to make it hold water. It is holding very well and I do not desire to develope a leak. Are there any suggestions , if necessary I would change from pvc?
thanks
