Insulation Around Brick Chimney In Attic

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.

Insulation around brick chimney in attic.

The b vent system requires air space clearance as well as clearance from combustibles. In either cse it fills the required open air space around the b vent in the un conditioned attic space. 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. Fiberglass is one of the most commonly used materials for insulating the home.

The opening around a furnace or water heater lue or chimney can be a major source of warm air moving in the attic. In hot climates it prevents heat from outside the house entering reducing the need to use air conditioners. You will probably have to look somewhere besides the big box stores for this. Fiberglass insulation is commonly used in attics around the chimney stack.

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. A 2 inch board has r 13 insulation. 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.

It may be easier to use rigid foam insulation than. If there is a straight open space accessible from above you might consider polyisocyanurate foam insulation. You might want to consider a wireless thermostat. I think i ll either.

They make 4 wide blanket sized insulation for this. Both can be added to uninsulated attics or layered over existing material. Loose fill or batt the common term for blanket insulation. Insulating your crawl space walls with at least an r 19 or r 21 will go a long way.