condensation in upper chimney chase

Michigan, United States   

we own a Rapid River log home(Michigan U.P.) and a Majestic natural gas fireplace.

The fireplace is built into a wood chase (2’x4’) covered with stone. It stands about 26’ from first floor to vaulted ceiling, then another 8’ above the roof line.

A cement cap with two double wall metal stacks. A second floor (loft area) fireplace is also vented into the chase.

Now the problem, in winter, condensation gets into and on the inner upper chase and then freezes and ice builds up on inner walls, as well as on metal stacks, closing off return air (shutting off fire). Then when sun warms, ice melts and water runs down inner chase walls, hits ceiling line and leaks.

What can we do to correct?


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by ChimneyChick | July 17, 2015 ChimneyChick's avatar
Midland, Ontario

Insulate the upper chase so that it stays warm. Just as you would for a room inside the home, You MUST make the chase a part of the homes envelope and construction or this will continue to happen.
Your builder should have done all this before he left the premises.

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