How To Insulate Chimney In Attic

Cut two flat sheets of aluminum flashing that are 14 inches long and narrow enough to fit between the ceiling joists around the flue.

How to insulate chimney in attic.

Fill every joist space completely and evenly with the insulation leaving attic vents uncovered. Measure and cut the flashing for each side of the chimney using sheet metal cutters. 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. Level uneven spots with a rake.

Using the hose clamp feature tighten the bottom connector onto the liner. Turn the water heater or furnace off and allow the flue to cool to the touch. Sealing an air leak around a chimney in the attic 1. Set up a cordless drill with a.

Access the attic through a crawl space in the ceiling using a stepladder or use or the attic stairs. Put on work gloves. Measure the circumference of 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.

Cut the liner to these measurements leaving a neat edge. Some larger gaps weren t in direct contact with the masonry. This makes it an ideal insulation material for use in areas that experience high temperatures. Take the chimney liner out of the package and place it on a flat surface.

Enjoy the videos and music you love upload original content and share it all with friends family and the world on youtube. Measure from the bottom termination point to the top of the chimney s crown and then add 1 foot. Fiberglass insulation is naturally fire resistant.