How To Insulate Furnace Pipe In Attic

Unwrap the flashing from the vent pipe so you can work with it.

How to insulate furnace pipe in attic.

Turn the water heater or furnace off and allow the flue to cool to the touch. Bend these newly cut tabs in. Cut enough aluminum flashing from the roll to wrap around the vent pipe with an extra 6 inches to spare. Measure the circumference of the flue.

Cut two flat sheets of aluminum flashing that are 14 inches long and narrow enough to fit between the ceiling joists around the flue. A furnace in the attic is a design that works for all homes. You might not receive the same air movement benefits if the unit is in a garage either. Fasten blocking around the hatch or door to allow the material to be installed around this area without escaping.

Make sure the fill s depth is uniform across the attic. Super insulating our attic part 2 duration. Then use fire rated caulk to seal the gap btw the sheet metal and flue and then the sheet metal to the attic floor. If you don t have a crawl space or a basement then it can be a challenge to place a furnace on the ground floor of the structure.

This will allow you to slip the insulation over the pipe corner easily. For corner joints that need to be insulated cut a simulated miter joint by cutting the insulation at a 45 degree angle. Continue this process over the entire length of piping in your attic. Cut 1 inch deep slots a few inches apart along the top side.

Now cut 2 inch deep slots. Based on the volume of the attic it may per code and the math be adequate and especially with all the attic floor penetrations on a typical retrofit. Owens corning 762 202 views. And don t we have 50 gallon gas water heaters gas stoves and sometimes even furnaces in conditioned space quite often and code allows this per their mathematical required volume of air needed.

To make it easy to eyeball how level the material is as you blow it in screw depth guides to joists throughout the space. This will stop the air from getting a free ride along the chase and heating your attic. Take 2 pieces and cut a c in both. How to insulate a metal flue pipe.

Nail them both on the attic floor so they butt up against the flue. Joe shows you how to make an attic insulation shield when space is an issue.