i have several rolls of your reflective insulation i am remodeling my home, i am taking all drywall out my walls are 2x4 i went online and i guy was selling 4x9 sheets of polyplank LAM Pregis PolyPlank LAM 1.7 the thickess is 2.25 inch thermal resistance is 4.82 and the theraml conductvity is 0.467 is it wise for me to use this then the reflective insulation of should i use fiberglass then reflevtive please help, what should i do i want the best insulation form my house