$61.99 1/2 Insulation board with 1Ã3 wood boarders. Proped up with another 1Ã3. Used heavy duty 
R-Tech 1/2 in. x 4 ft. x 8 ft. R-1.93 Insulating Sheathing-320810 - The Home Depot
2 1/2 in x 4 ft x 8 ft Dow STYROFOAM Brand Scoreboard Extruded Polystyrene Foam Insulation at 
