Air Seal Attic Chimney

Sealing an air leak around a chimney in the attic 1.

Air seal attic chimney.

Just put it back into place. This isolated the masonry from an r 60 blanket of cellulose insulation that was blown in place after all the airsealing measures were implemented. Combined with attic insulation air sealing can help to alleviate the formation of dangerous ice dams in the winter. The support maintains a 1 inch airspace between the outside of the insulated chimney and everything outside of the support.

Seal air leaks around fireplace chimneys furnaces and gas fired water heater vents with fire resistant materials such as sheet metal or sheetrock and furnace cement caulk. Access the attic through a crawl space in the ceiling using a stepladder or use or the attic stairs. This is a result of moist air leaking into your attic and then freezing when it hits your cold attic. By air sealing in your attic you can stop many major air leaks and help to maintain the desired temperature throughout your home.

High temp sealant sheet metal and snips. Cut to the chase permalink. Install a piece of weather stripping around the access hole in the attic. Measure and cut the flashing for each side of the chimney using sheet metal cutters.

Compare with other projects. Once the metal is in place. Put on work gloves. Locate the main plumbing stack furnace flue or chimney and note this on your sketch for a reference point once you get into the attic.

View from within attic access. Once you seal the air leak with caulk or expandable foam it s not necessary to replace the insulation. Cut a piece of plywood to the size of your attic door. Fireplace flues are made from metal and over time repeated heating and cooling can cause the metal to warp or break creating a channel for air loss.

Drop the attic door over the weather. Pressurize your house once you re ready place a box fan in a window so it s blowing air into the house and close all the remaining windows and doors. My natural gas furnace exhausts into a block. Cut a few pieces of foam board insulation the same size and screw them to the plywood with long 4 screws.

Set up a cordless drill with a. There will definitely not be cellulose in contact with the chimney. Once the air seal was accomplished jerome installed a roxul mineral woolinsulation barrier around the chimney. All you need to do is.

Air seal and insulate your chimney to save money initial state of the chimney permalink. It is essentially a sheet metal box that gets mounted into the opening through which the chimney passes.