How To Insulate Around A Chimney In Attic

Step 1 preparing your liner.

How to insulate around a chimney in attic.

Form an insulation dam to prevent insulation from contacting the lue pipe. How to insulate a metal flue pipe. Take the chimney liner out of the package and place it on a flat surface. Joe shows you how to make an attic insulation shield when space is an issue.

Lay a two by four on top temporarily compressing the insulation to a manageable. Fiberglass insulation is naturally fire resistant. It is often installed in gaps around the chimney and flue to prevent airflow that can siphon the heat away from the interior of the building. Cut two flat sheets of aluminum flashing that are 14 inches long and narrow enough to fit between the ceiling joists around the flue.

This makes it an ideal insulation material for use in areas that experience high temperatures. As such it can be used to insulate a chimney. Finally prepare for adding insulation foam or additional fiberglass batts by installing a second piece of vertical sheet metal that provides a 2 inch airspace around and parallel to the chimney. Because the simplest and cheapest way to insulate an attic is to add material to the floor.

Cut slots about 2 inches deep along the bottom and bend out the tabs. Measure the circumference of the flue. Cut slots 1 inch deep and a few inches apart along the top and bend the tabs in. Turn the water heater or furnace off and allow the flue to cool to the touch.

Plan to pull up the flooring and layer new insulation on top of the old. But if the floor is covered in plywood you can t stuff enough insulation beneath it to do the job sufficiently not even in warm climates. To cut blanket style insulation place the product over a piece of plywood with its paper or foil side down.