I am new here and wanted to ask a question.
I live in Central Maine. I.E. rocky terrain, cold winters and deep frost.
I am building a deck on my house. I have built several decks in the past and have had good success.
My plan was to put my post on footings. The footings would be dug 4-6" deep, 6-8" diameter. I would place "Sono-tubes" in the hole and fill w/ concrete. I would then anchor the 4X4 PT post to the top of the footing. This is how I have built my decks in the past.
I have been told by several people around here that they do not go through this labor intensive ordeal. Instead, they use "moon pads." I am not sure if this is the actual term as I have done several internet searchs and have found nothing on "moon pads."
Anyway this "moon pad" device is a concrete block that sits on top of level ground. The post would then attach to the top of the pad. The pad also sits on top of 2" of rigid, styrofoam type, of insulation. The theory is that frost does not move side to side, but only down.
The insulation beneath the pad would prevent the pad from moving through frost.
I have never heard of this before. It sounds a little 'hokey.' I am not sure if I should trust it. Call me old fashion ... but I've never done it that way.
Believe me, however, it sounds easier as digging holes into the rocky Maine terrain is less than fun.
Anyone have comments or suggestions about this.
I could sure use the help.