Chimney Height Violations: The 3’:2’:10’ Rule
For Safety purposes, building code requires that a chimney must meet the 3:2:10 requirement. The 3:2:10 requirement states that the chimney must terminate at least 3 feet above the highest point of the roof that it penetrates, and be at least 2 feet higher than anything within an imaginary 10’ horizontal radius encompassing the top of the chimney.
This requirement is primarily for two reasons:
1. To ensure nearby combustible objects are less likely to catch fire. Objects such as trees, roofs gables, walls, etc. must all be kept at a respectable distance to prevent an unintentional fire.
2. To keep your fireplace from smoking into your home by trying to ensure the chimney will draft properly. If the top of your chimney is too close to an adjacent object such as a tree, wall, or nearby building, wind may create a high pressure plane that may push air down your chimney and force smoke into your home. In some situations, even though your chimney meets minimum height requirements, it may still need to be extended higher in order to draft properly.
If your chimney is not tall enough to meet minimum building code, A to Z is very experienced at extending chimneys to their proper heights. When it comes to your chimney’s safety and performance, A to Z goes to great “lengths” in ensuring your safety and comfort aren’t “short” changed!
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Dear A to Z,
We wanted to thank you and tell you that we were impressed by your employees and the work you did at Sunnyside Steakhouse & Lodge (Tahoe City, CA).
To reline our 50+ year old chimney, rebuild the firebox, install a fan on the top of our huge chimney, and refurbish our ornamental chimney cap was a big job.
You and your crew did it professionally, timely, and you were very clean. What we are excited about most is that we (and our guests!!) are enjoying a fire on a night when it would have been virtually impossible to do so because of the wind direction! No more chimney smoke spilling into our lodge! What you’ve done for us is fantastic. Thanks for taking this job even though it was out of your area.
~ Jeff Oxandaboure, General Manager & Janet Gregor, Lodge Manager
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