I am looking for insulation for finishing a basement. Can this be used with Superior Walls 2ft x 8ft space. There is blue 2" insulation board already

Hi Willwalsh99, if 2 inches of rigid insulation is already in place, you may want to use an unfaced insulation batt to avoid creating a potential moisture trap. Otherwise, as long as the insulation is correct for the cavity size, it is acceptable for use in this application. Thank you for your inquiry!