How To Insulate Chimney In Attic

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How to insulate chimney in attic.

Put on work gloves. 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. How to insulate a metal flue pipe. Set up a cordless drill with a.

Sealing an air leak around a chimney in the attic 1. Level uneven spots with a rake. Fill every joist space completely and evenly with the insulation leaving attic vents uncovered. Using the hose clamp feature tighten the bottom connector onto the liner.

Access the attic through a crawl space in the ceiling using a stepladder or use or the attic stairs. Measure the circumference of the flue. Measure and cut the flashing for each side of the chimney using sheet metal cutters. Take the chimney liner out of the package and place it on a flat surface.

Cut the liner to these measurements leaving a neat edge. Turn the water heater or furnace off and allow the flue to cool to the touch. Measure from the bottom termination point to the top of the chimney s crown and then add 1 foot. Cut two flat sheets of aluminum flashing that are 14 inches long and narrow enough to fit between the ceiling joists around the flue.

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. This makes it an ideal insulation material for use in areas that experience high temperatures. 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.