[Kenn]

I am using 15/32" exterior grade from Lowes. I am using three layers of 9 once cloth on the inside and two layers on the outside. The inside joints will have an adhesive fillet shaped with a spoon and covered with more cloth. The outside joints will have several layers of cloth. I am installing a tank monitor system made by Tech-Edge Manufacturing in Sweethome Oregon (541) 610-3116. This is a system that mounts foil tape on the outside of the tank and reads through the tank wall. I will be putting the tape on the inside of the tank and running the wires to the outside. The foil tape will be glassed over on the inside.