Chimney Leaking Smoke Into Attic

Gas fireplaces give off fumes with moisture due to the lower temperatures and of the correct liner isn t installed that moisture can build up and seep through your chimney walls.

Chimney leaking smoke into attic. Chimney leaks caused by condensation happen when a chimney is converted from wood burning to gas burning and isn t fitted with the proper liner. If the top of the chimmney is below the roof line downdrafts could be swirling down toward the chimney. Sometimes a leak can occur without visible problems making the correct fix hard to identify. It has happened and usually isn t discovered until people have spent a terrible sum fixing everything else.

Have a certified chimney sweep inspect the chimney and make recommendations. Water leaking into a chimney increases the chance of damage to the chimney flue or chimney structure. Solving chimney leaks can be difficult as there are many potential spots that could cause the leak. Rerendering may stop the smoke but my advice would be to fit a twin wall stainless steel liner.

This may make the smell of smoke more apparent in upstairs rooms as it leaks out of its ow2n flue and into other unused flues. Don t let one observation at a chimney distract you or convince you that further up close inspection is not needed. Once the outer walls of the flue start to leak then action is imperative if you plan to keep on using the fireplace. Code requires a chimney have a cricket if it is thirty inches or wider.

The other thing to check is downdrafts. Start a small test fire and this time open a window in the same room as the fireplace with the restored chimney. If you see water entry in the attic on the uphill side of the chimney we know a chimney cricket is needed so water is not ponding in this area. It s hard to see them but the chimney needs to be free of any downdrafts.

This blocks the wind from coming down the chimney while at the same time allowing for the smoke to exit the chimney. Another event that could happen although i have never heard of it actually happening is that you could get so much moisture in your attic that it could condense and roll down the stringer onto your chimney. There is tremendous heat from chimney fires i have seen stacks split from the heat so for peace of mind get a liner in preferably by a hetas registered installer. If you have no smoke coming into your attic or other fireplace you ve confirmed.

If you ever had a chimney fire i wouldnt rely on the render stopping further damage.