How to Insulate a Dryer Vent Pipe
Wrap the insulation around the dryer vent pipe and pull it tight. It should overlap a few inches. Step 5. Tape the overlap seam down with 3-inch foil aluminum tape. Fasten the tape to the entire length of the seam. Step 6. Continue to cut insulation and secure it to the dryer vent pipe until the entire dryer vent pipe is insulated.