I constantly have pieces of coal in the chimney, it falls in the living room and it becomes hard as glass. Is it dangerous? The chimney sweeper advised us to pipe the chimney, is this a good solution?
It is cullet, association of soot and of tars, residues of imperfect combustion. This type of "coal" can cause a risk of chimney fire. It is difficult to remove by sweeping because of its hardness but often comes off under the effect ofchimney sweeping logs"(which can not replace a real mechanical sweeping, however) Tuber is a good solution (but it must be done professionally by a professional).
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