I HAVE INSULATED THE BETWEEN THE FLOOR JOISTS IN
MY BASEMENT WITH UNFACED R19 FIBERGLASS INSULATION. THE BASEMENT WILL NOT BE FINISHED
OFF AND IS UNHEATED. WHAT DO I PUT UP OVER THE
INSULATION TO KEEP FIBERS FROM BECOMING LOOSE
AND DOES IT NEED TO BE BREATHABLE. SOME HAVE SUGGESTED JUST PLASTIC. THE BASEMENT IS UNHEATED