Missing chimney cap

Heating · Metal Chimneys or Vents · printed page 172 (PDF page 173)

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Book index entries

Cap Missing for Metal Chimney Missing – Metal Cap Missing Missing Chimney Cap – Metal Metal Chimney Metal Vent

Text in the illustration

a proper cap is particularly important with a metal chimney/factory built fireplace combination because there is usually no smoke shelf to catch water running down the chimney and the metal flue is readily corroded by water
chimney caps also provide protection against downdrafts
rain
downdrafts

Generated explanation

A metal chimney projects through a sloping shingle roof with flashing and a collar at its base. The chimney termination is open and lacks a cap, highlighted by a red prohibition symbol. Arrows labeled rain and downdrafts point into the open termination. The annotations explain that a cap is particularly important for a metal chimney serving a factory-built fireplace because there is usually no smoke shelf to catch incoming water and the metal flue is susceptible to corrosion.

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