How To Insulate Chimney In Attic

Cut the liner to these measurements leaving a neat edge.

How to insulate chimney in attic.

Measure from the bottom termination point to the top of the chimney s crown and then add 1 foot. Take the chimney liner out of the package and place it on a flat surface. Sealing an air leak around a chimney in the attic 1. 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.

Turn the water heater or furnace off and allow the flue to cool to the touch. Level uneven spots with a rake. With a helper to load the blower with insulation as needed start at the perimeter of the attic and work toward the attic access door. Some larger gaps weren t in direct contact with the masonry.

Enjoy the videos and music you love upload original content and share it all with friends family and the world on youtube. To block the air pathway the technician cut 26 gauge metal flashing to fit over the gaps and sealed the joints between the metal and the masonry chimney and the wood framing using high temperature caulk in this example 3m fire barrier sealant. This makes it an ideal insulation material for use in areas that experience high temperatures. Cut two flat sheets of aluminum flashing that are 14 inches long and narrow enough to fit between the ceiling joists around the flue.

Measure and cut the flashing for each side of the chimney using sheet metal cutters. Fiberglass insulation is naturally fire resistant. Access the attic through a crawl space in the ceiling using a stepladder or use or the attic stairs. How to insulate a metal flue pipe.

As such it can be used to insulate a chimney. Put on work gloves. Using the hose clamp feature tighten the bottom connector onto the liner.