Insulation (Flexel) Sheet
Insulation (Flexel) Sheet
Flexel sheet (also called bitumen soft board) is produced from wood fibers taken as wastechips, saw dust and off-cuts from saw-mills. It is primarily used to protect waterproofing materials from damage during normal construction activities or backfilling. It is also used in all expansion joints including roofs. It comes in both 12mm and 18mm thicknesses.