Up on the roof, there was a rectangular slice of brick. The rest of
the brick, still in the chimney, felt as if it could be scraped away
just with your fingertips. A second brick in the chimney has an outer
slice also ready to fall off.
Ever hear of such a thing? Causes? Cures? Thanx.
email@example.com (m Ransley) wrote in message
The chimney should have a flue liner to keep the combustion products
away from the bricks and mortar. Without one, over time, the acid
byproducts of combustion will deteriorate the chimney and cause a
potentially serious condition, where flue gasses can enter the home.
Older homes typically have a ceramic one. If you don't have a liner,
there are stainless steel ones available that can be inserted inside
the chimney, after it's repaired.
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