I recently moved our laundry room to the second floor of our home. The dryer vent goes up 5 feet into the attic and the makes a 90 degree turn and runs 5 feet horizontally and vents through the soffit. All duct work is 26 gauge except for a small flex angle through the soffit. I also installed an inline fan to help with exhaust. I have 2 questions, the first is should the exhaust duct be insulated to eliminate condensation? What insulation is recommended?