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How to Measure a Chimney Cap for Round Flues

How to Measure a Chimney Cap for Oval Flues

A quality chimney cap is a good investment. It can prevent rain damage to the chimney. Rain damage can cause the chimney to become unstable. The chimney cap can also keep animals from entering your home. If you measure a chimney cap for oval flues correctly, you will be on your way to preventing problems.

Measuring A Chimney Cap For Oval Flues




  1. Measure the length and width of the entire outside edge of the chimney. The measurements should be taken in inches.


  2. Measure the length and width of the inside of the chimney. Take the measurements in inches.


  3. Measure the height of the chimney. Take the measurements in inches.


  4. Make sure you get three good measurements for a good fit. Getting three good measurements will prevent you from having to go back on the roof for additional measurements.