Floor System Insulation Strategies By webadmin April 20, 2014 Comments Off on Floor System Insulation Strategies THIS INSULATION WAS ABOUT 5 YEARS OLD NOTICE THAT OUR PRODUCT COMPLETELY FILLS A 2X8 FLOOR SYSTEM NOTICE HOW WE MAKE IT A POINT TO INSULATE THE BAND-JOIST! GIVEN THAT THIS WAS A VENTED – EXPOSED CRAWLSPACE, WE NEEDED HEAVY DUTY, RODENT PROOF INSULATION SO WE USED CLOSED CELL 2LB/FT3 FOAM THIS IS ACTUALLY QUITE A BIT THICKER THAN NEEDED TO ACHIEVE R19