Insulation Around Chimney In Attic

Both can be added to uninsulated attics or layered over existing material.

Insulation around chimney in attic. How to insulate a metal flue pipe. In hot climates it prevents heat from outside the house entering reducing the need to use air conditioners. Don t you still need a 2 clearance to combustables. Spun fiberglass insulation is like a sponge as far as its ability to collect and hold significant volume of water.

You can wrap the masonry with a 3 5 fiberglass batt and then blow cellulose up to the batts. It is an effective barrier to the passage of heat. Turn the water heater or furnace off and allow the flue to cool to the touch. Fiberglass is one of the most commonly used materials for insulating the home.

The b vent system requires air space clearance as well as clearance from combustibles. Cut two flat sheets of aluminum flashing that are 14 inches long and narrow enough to fit between the ceiling joists around the flue. Due to pressure differences caused by stack e. Holes hidden in attics basements and crawlspaces are much harder to locate and usually cause bigger problems.

Once you ve decided which type is best for you examine the material options and prices to home in on the right product. For diy attic insulation you ve got two choices. Loose fill or batt the common term for blanket insulation. Measure the circumference of the flue.

Fibreglass is not considered non combustable correct. Fiberglass insulation is commonly used in attics around the chimney stack. Furnace flues require special sealing techniques the opening around a furnace or water heater lue or chimney can be a major source of warm air moving in the attic. You can insulate around masonry chimneys after airsealing with mineral or fiberglass batts no foam or cellulose directly against the chimney.