Grease duct joints are held jointly by means of shaped V clamps and sealed with 3M Fire Barrier 2000+. The acoustic performances along with the room temperature thermal insulation of Promat ductworks might be even improved by the use of added layers of mineral wool or plasterboards. ROCKWOOL products can https://fire-resisting-ductwork-i01122.blogoxo.com/37135324/a-simple-key-for-grease-tight-extract-ductwork-unveiled