NRG Greenboard™ is an insulated wall panel that combines exterior cladding with insulation properties so designers can achieve the 6 star energy ratings that have been introduced into the building code. NRG Greenboard™ is a high density expanded polystyrene, containing fire and vermin retardant, acheive thermal ratings  options from 1.92R to 3.96R,with added advantage of an acoustic rating(RW38). Creating an exterior dual cladding system, as a thermal exterior building envelope. NRG Greenboard™ insulated wall panel is a lightweight,cost effective energy efficient product,e and once coated, the system provides a weather resistant, seam free rendered finish.