Short Stacked Prefabricated Chimneys
“Short Stacked” chimneys occur when the contractor installing the fireplace and chimney shows up without enough chimney pipe to complete the job. Rather than making a second trip back with enough chimney pipe, the installers sometimes “forget”, and the homeowner is left to deal with a potentially dangerous situation.
Why is “short stacking” dangerous?
Normally as you burn fires, the hot gases rise up through the chimney and escape safely through the chimney cap into the outer atmosphere. For Safety purposes, the manufacturer’s instructions on how their chimney is to be installed are very specific, and allow little leeway for variance. These instructions specify the closest allowable distance the bottom side of the chimney cap can be to the top of the chase pan cover.
If the cap is installed too close to the chase pan cover, the combustible wood directly beneath it can overheat and catch fire. Often this is the case where the installers BARELY had enough pipe to be even with the chase pan cover, but not enough to elevate the cap high enough. In extreme cases, the chimney pipe doesn’t even reach the chase pan cover and smoke and hot gases spill directly into the hollow wooden chase! BOTH CONDITIONS ARE EXTREMELY DANGEROUS.
|The chimney pipe in this wooden chase stopped well below the chase pan cover, and hot gases were spilling into the hollow chase. YIKES!!!||Chase pan cover.||Hollow wooden chase.|
If your chimney is “Short Stacked”, discontinue use until additional chimney pipe has been installed so that hot flue gasses from your fires can vent into the outside atmosphere safely.
The trained professionals at A to Z can inspect to be sure your prefab chimney is the correct height for safe operation. If it isn’t the proper height, we can make the repair to keep you safe.
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A to Z did a great job sweeping our chimney! After they cleaned the flue, they put a small camera up the chimney to make sure it was sound. He had me look at the computer screen to show me what he was looking at and he was able to show me that our chimney was in great shape (after the cleaning, of course).
The whole process was seamless and easy for me and the technician was very professional throughout.
~ Lori Hanegan, Rocklin, CA
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