I have a waste disposal problem, but I am not alone. This is a big problem for the planet, I've learned. I have three rooms in my barn for oyster mushroom production. One has been ruined by rats nesting in the fiberglass insulation. A few years ago I stored wheat in a specially built (inadequately built, as it turned out) room in the barn. It attracted rats and they multiplied. They needed nesting material and found my heated grow rooms (for mushrooms) attractive. I got rid of the grain, added 10 cats (we had them already and stopped supplemental feeding) and reduced the rat population. Now I need to re-insulate with spray foam. The pink insulation was barely adequate anyway and caused me to waste wood and BTUs. The pink insulation is fouled with rat feces and urine. It is a genuine mess. In researching what to do with the materials, I learned that this problem is BIG. Waste disposal landfills are full of the stuff and many including mine require it to be stuffed in plastic bags. In my case double bagged. Then the waste must be transported to the landfill and a charge of $2.50 per bag is imposed. In researching further, I found that fiberglass is made of glass fibers which in turn is made mostly from sand. A Swiss/German consortium has evolved a process of pyrolyzing chopped waste fiberglass and using the resulting compound in cement which also has a large sand component. This is a great solution for the world, so we won't overwhelm the planet with waste fiberglass, although shipping all that material to Germany might pose other issues. I know about pyrolysis from my gasification boiler operation. I also use cement occasionally. With a hot fire in the boiler, dare I try to pyrolize (burn) the pink insulation/feces/urine and use the remaining resulting ash in a cement. I know that insulation is slow to burn but it will catch eventually. I want to reinforce one of the barn outbuildings with a lower wall of cement and I'd love to know that I recycled and saved on materials. The gasification boiler burns clean but this material might produce unwanted emissions. If I see it polluting, I will stop. It may in small amounts added to the wood be unnoticeable and that is what I am hoping for.