Insulation Around Brick Chimney In Attic

The b vent system requires air space clearance as well as clearance from combustibles.

Insulation around brick chimney in attic. It may be easier to use rigid foam insulation than. I think i ll either. Seal between the chimney and the framing with fireblock foam or caulk to prevent exterior air from coming in and then put 3 of roxul directly against the chimney brick. You will probably have to look somewhere besides the big box stores for this.

If there is a straight open space accessible from above you might consider polyisocyanurate foam insulation. They make 4 wide blanket sized insulation for this. A 2 inch board has r 13 insulation. Go with a full aluminum sheath right against the chimney to serve as the air barrier and then fill in behind it with roxul or 2.

For diy attic insulation you ve got two choices. Once you ve decided which type is best for you examine the material options and prices to home in on the right product. It is an effective barrier to the passage of heat. Spun fiberglass insulation is like a sponge as far as its ability to collect and hold significant volume of water.

Loose fill or batt the common term for blanket insulation. The opening around a furnace or water heater lue or chimney can be a major source of warm air moving in the attic. Insulating your crawl space walls with at least an r 19 or r 21 will go a long way. Both can be added to uninsulated attics or layered over existing material.

If the chimney is an older brick one it may be possible to insulate it along the warm side at the same time as the walls of the knee wall spaces. In hot climates it prevents heat from outside the house entering reducing the need to use air conditioners. Fiberglass is one of the most commonly used materials for insulating the home. Fiberglass insulation is commonly used in attics around the chimney stack.