Short Stacking Chimneys - Sacramento CA - A to Z Chimney Services
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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.

Short Stacked Chimney Image - Sacramento CA - A to Z Chimney ServicesShort stacked chimneys often sit directly on top of the chase pan cover with no chimney pipe visible. Chimney Cap Sitting Low - Sacramento CA - A to Z Chimney ServicesLooking at a neighbor’s house will often reveal that your chimney cap sits much lower than it should. Proper Chimney Height - Sacramento CA - A to Z Chimney ServicesProper height with cap above chase pan cover and chimney pipe visible.

Chimney Cap Measurement - Sacramento CA - A to Z Chimney Services

Measuring the distance between the bottom of the chimney cap and the top of the chase pan cover reveals that this cap is too close for comfort!

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.

Chase Pan with Heat Rings around Chimney Cap - Sacramento CA - A to Z Chimney ServicesThis chase pan cover exhibits concentric heat rings around the chimney cap, and the galvanized finish has been burned off causing rust to quickly form. Concentric Heat Rings Around Chimney Cap - Sacramento CA - A to Z Chimney ServicesConcentric heat rings around the chimney cap. Charred Wood Beneath Chase Pan - Sacramento CA - A to Z Chimney ServicesThis charred wood was found beneath the singed chase pan cover to the left. Close call, indeed!

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.

Wooden Chimney Chase Damage - Sacramento CA - A to Z Chimney ServicesThe chimney pipe in this wooden chase stopped well below the chase pan cover, and hot gases were spilling into the hollow chase. YIKES!!! Chimney Chase Pan Cover - Sacramento CA - A to Z Chimney ServicesChase pan cover. Hollow Wooden Chimney Chase - Sacramento CA - A to Z Chimney ServicesHollow 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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Testimonials

Dear A to Z,

I just wanted to thank you for your honesty and for a thorough inspection of my chimney. One of the biggest concerns I have when hiring service professionals is being taken advantage when not having first hand knowledge of the various procedures. Last year when I had my chimney swept by one of your competitors, they claimed that I had a chimney fire, and that my flue was now cracked and needed extensive repairs.

This year, I hired A to Z to come out and sweep and inspect the flue because I heard they inspect the chimneys with a Chim Scan camera at no additional charge. The technician who came to my home, assured me I would be able to see any cracks or hazardous conditions along with him as he video scanned my flue. To my utter delight, NO EVIDENCE OF A CHIMNEY FIRE OR DAMAGE IN MY FLUE WAS DETECTED!!! Chris was extremely detailed in his inspection and really took his time educating me so I could feel comfortable. It was obvious that he knew what he was talking about and truly interested in doing the right thing…a far cry from last year’s experience with the other company. If anyone asks for an HONEST, COMPETENT, AND PROFESSIONAL chimney sweep company, I'll be sure to recommend A to Z!

~ Ms. Randi Scott, Lincoln, CA
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