The matrix applies CCHRC’s diverse building expertise and collaborative approach to an emergency situation. CCHRC is producing a design matrix to help emergency responders plan energy efficient replacement housing when floods, volcanoes, wildfires, or other disasters strike Alaska communities. The matrix connects the building science expertise of CCHRC and the local knowledge of communities with the need for rapid, high-quality construction in the event of emergencies. “The intent is to provide momentum to the Department of Homeland Security and Emergency Management in the event of disaster,” said CCHRC designer Corey DiRutigliano. Agencies and contractors can use the matrix to make decisions about what type of structure and building materials to use based on a host of factors–climate, soil type, transportation, season, and more. It includes 500 possible combinations of design criteria that can be tailored to a specific project. For example, a foam raft foundation can work on stable permafrost, while a piling foundation would be more appropriate for a flood-prone site because of the potential for erosion. How building materials are transported also drives design. A whole house truss, similar to the design used in the Crooked Creek prototype, would be both fast and affordable by truck or barge, but may not be practical by plane. Cellulose (which comes in large bales and is installed with special equipment) can be a great insulation choice on the road system, while polyurethane spray-foam is more economical in the air because it travels in 55- gallon drums and has the highest R-value by mass.