Chimney Leaking Smoke Into Attic

Don t let one observation at a chimney distract you or convince you that further up close inspection is not needed.

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. Once the outer walls of the flue start to leak then action is imperative if you plan to keep on using the fireplace. If the top of the chimmney is below the roof line downdrafts could be swirling down toward the chimney. 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.

Solving chimney leaks can be difficult as there are many potential spots that could cause the leak. Code requires a chimney have a cricket if it is thirty inches or wider. If you ever had a chimney fire i wouldnt rely on the render stopping further damage. It s hard to see them but the chimney needs to be free of any downdrafts.

If you have no smoke coming into your attic or other fireplace you ve confirmed. 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. Sometimes a leak can occur without visible problems making the correct fix hard to identify. Have a certified chimney sweep inspect the chimney and make recommendations.

Smoke a little like water can end up in places where you would not expect. Water leaking into a chimney increases the chance of damage to the chimney flue or chimney structure. 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. Leaks may come from the chimney crown through the flue opening cap through the brick and the flashing is always a potential leak.

The other thing to check is downdrafts. 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. Often ponding water will rust a hole in the simple flashing found on most chimneys. Rerendering may stop the smoke but my advice would be to fit a twin wall stainless steel liner.

Start a small test fire and this time open a window in the same room as the fireplace with the restored chimney.