As much as possible we are trying to keep the renovation eco-friendly, we went with EcoLogic Spray Foam Insulation, it is a polyurethane foam system made out of recycled plastic (a barrel of EcoLogic contains 1000 plastic bottles) and soya oil. It is also a zero ozone depletion product. Along with being made from recycled materials EcoLogic will greatly reduce the energy consumption of our house! It’s a win win situation. Check out their website for more information on this amazing product.