Step 6: Ventilation
I needed some shelf space anyway, to store procured items awaiting reconstruction. I built a set of shelves from plywood 2'x8' long. each shelf is supported by 4 concrete blocks, and it,s three levels high. One end of the shelves was positioned by a window.
Staples hold the insulation to the wood. Duct tape holds the rest together.
Another thing to point out. My exhaust blower has to be operating the whole time. This insulation is plastic, so it will soften as the heat rises. But the smoke has to be drawn out anyway so it works out.