How to Measure for a Single Flue Chimney Cap
to Fit a Square or Rectangular Flue:
Single Flue Chimney Cap Measure Guide
Single flue caps attach to the flue. For chimneys with a single square or rectangular flue, select a chimney cap like those shown below. Some single flue chimney caps that attach to the flue with clamps. The majority of single flue chimney caps, however, attach to the flue with set screws that press against the flue.
|Attaches to Flue with Clamps||Attaches to Flue with Set Screws|
Here are examples of chimney caps for single flues that attach to the outside of the flue with screws:
What to Measure for a Single Flue Chimney Cap
To measure for a single flue chimney cap, measure the outside length and width of your flue.
What to Measure for a Single Flue Chimney Cap If the Flue Does Not Stick Up at Least an Inch
If your single flue does not stick up at least one inch, you can use either a top mount chimney cap (also known as a multi-flue chimney cap) or a single flue chimney cap with a set of “legs.” The legs fit down inside the chimney flue and securely hold your chimney cap in most situations. We do not recommend the use of chimney caps with legs especially in areas with high winds. A top mount chimney cap is always a more secure choice if your single flue does not stick up at least an inch.
Single Flue Chimney Caps with Legs
• If your flue does not stick up at least one inch and you want a chimney cap with legs, measure the outside length and width of your flue.
• If your flue does not stick up at least one inch and you want a chimney cap that mounts to the top crown on your chimney, follow the measuring directions for top mount chimney caps (also known as multi-flue chimney caps.)
Top-Mount Chimney Cap on Single Flue Chimney
Which Metal is Best for a Single Flue Chimney Cap?
Single Flue chimney caps are manufactured from stainless steel, copper, and galvanized steel.
• Stainless steel is the best value for the dollar. Stainless steel is the preferred metal for salt water climates.
• Copper is the most elegant, especially for historic or upscale homes. Copper is not recommended for light colored chimneys.
• Galvanized steel is the least expensive and the least durable.
Stainless steel and copper chimney caps come with a lifetime warranty. Some stainless steel caps can be powder coated with black or colored with heat resistant finishes. Galvanized steel chimney caps are painted black.
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