 Re: we have built the base.....
Hi Jubilee and welcome aboard. I used vermiculite for my insulation layer, but be sure to remember, it is JUST an insulating layer. It has absolutely no stuctural value. Very important to lay a 3 1/2 to 4' structural layer - with rebar - first. Then the insulation, which ever you choose, can be poured on top. Just as the insulating layer has no strctural value, the structural layer has no insulating value. So you must have both and have them in the proper order.
Hope this makes sense. I'm looking forward to watching your progress and will help anytime if I can.
Have fun building! I sure did.
dusty |