Danny started moving some of the dirt 'on top of' the house. Actually, it will take a lot of time and work before he gets to the 'top'. But he has started to move dirt up the West side and East side of the house. So, we needed to place the insulation on the retaining walls so the dirt under the umbrella will be insulated from any heat gain/loss thru the walls. We still need to insulate part of the tunnel on the East side.
We used an adhesive to have the blueboard adhere to the concrete, and propped them up in the meantime. This way we don't need to be in Danny's way to hold the insulation in place and possibly get buried alive.
Danny started moving some of the dirt 'on top of' the house. Actually, it will take a lot of time and work before he gets to the 'top'. But he has started to move dirt up the West side and East side of the house. So, we needed to place the insulation on the retaining walls so the dirt under the umbrella will be insulated from any heat gain/loss thru the walls. We still need to insulate part of the tunnel on the East side. 
