Insulation Around Chimney In Attic

In either cse it fills the required open air space around the b vent in the un conditioned attic space.

Insulation around chimney in attic.

You can wrap the masonry with a 3 5 fiberglass batt and then blow cellulose up to the batts. Due to pressure differences caused by stack e. Loose fill or batt the common term for blanket insulation. How to insulate a metal flue pipe.

Don t you still need a 2 clearance to combustables. Once you ve decided which type is best for you examine the material options and prices to home in on the right product. Fibreglass is not considered non combustable correct. Because the pipe gets hot building codes usually require 1 inch of clearance from metal lues 2 inches from masonry chimneys to any combustible material including insulation.

Fiberglass is one of the most commonly used materials for insulating the home. It is an effective barrier to the passage of heat. Both can be added to uninsulated attics or layered over existing material. 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.

Cut two flat sheets of aluminum flashing that are 14 inches long and narrow enough to fit between the ceiling joists around the flue. Fiberglass insulation is commonly used in attics around the chimney stack. Measure the circumference of the flue. Holes hidden in attics basements and crawlspaces are much harder to locate and usually cause bigger problems.

Spun fiberglass insulation is like a sponge as far as its ability to collect and hold significant volume of water. In hot climates it prevents heat from outside the house entering reducing the need to use air conditioners. For diy attic insulation you ve got two choices. Turn the water heater or furnace off and allow the flue to cool to the touch.