My brick chimney is open on top which allows the rain to get in and some of
the mortar inside is turning white and powdering.
Is there something I can build to cover it or do I have to purchase the
A possibility is a spring loaded cap that has a cable down the chimney
to an operator handle. When the fireplace is not in use the operator
handle pulls the cap down on top of the flue sealing it.
I would agree with the camera inspection. If you are having mortar fall
down and have been taking in water for some time...it could be real
ugly in that chimney and you need to know how bad the chimney is
damaged, especially since you are using this fireplace.
Im not a real fan of chimney top dampers. when they are closed heated
air raises up and then cools and sinks down again. It casues a cold
draft feel at the hearth even if there is no outside air getting past
A good combo is a stainless chimney cap (none of that galvanized
garbage at home depo) and a chimney balloon to get a tight seal down by
As someone mentioned, get a stainless steel chimney cap. Get the
chimney inspected by someone who knows what they are doing.
Try to burn a few fires every winter to help dry out the interior. Buy
a product called CHEM-STOP at a local masonary supply store (there are
several different types, buy the one that will work on chimney bricks)
and "paint" the exterior of your chimney with toward the end of your
"dry season" each year.
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