Here Slab duct detailing with component, including flashing, water proofing flashing , MFTR standard steel curbs also provided metal cladding , sheet metal flashing,25 THK rigid insulation all around also provided slop, and slab opening shown in drawing product reinforced with aluminum foil, provided as a semi- rigid slab for insulation. Due to the shape they are better suited for rectangular ducts and have properties suitable for thermal insulation. For more details of Slab duct detailing with component download this file.