Grease duct joints are held jointly by means of shaped V clamps and sealed with 3M Fire Barrier 2000+. Fire resistant board for sealing support penetrations in walls or flooring This high-overall performance FireMaster procedure is critical to cut back warmth transfer throughout a wall or roof exposed to fire, https://simonkcqfs.blogdiloz.com/35839191/fire-resisting-ductwork-insulation-things-to-know-before-you-buy