Glass wool (originally regarded also as fiberglass) can be an insulating material made from fibres of glass arranged using a binder into a texture just like wool. Thermal Engineering You can set up batts in two layers throughout an unfinished attic floor, perpendicular to one another, for amplified effectiveness at https://augustwrnn15050.digitollblog.com/36586100/how-much-you-need-to-expect-you-ll-pay-for-a-good-glass-wool-board