Fear of Crack- Fireplace Chimney Flues Tiles

Reblogger Roy Kelley
Real Estate Agent with Realty Group Referrals 16766

The most common type of flue liner built in homes across the United States is a clay tile flue liner. This is the case because clay tiles do an effective job of protecting the home for an average of about 25 years and yet they are inexpensive materials preferred by the vast majority of builders.

 

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Original content by Donald Hester

Wenatchee Home Inspector
Fear of Crack- Fireplace Chimney Flues Tiles

 



Cracked Flue Liner



One very common and potentially dangerous situation is a cracked chimney flue liner. During a home inspection one the items I am looking for are cracked tiles. The signs can often be subtle or even hidden behind creostoe that may have built up on the flue liner.



The chimney flue is the narrow passageway in which the combustion byproducts of the fire are removed. The construction and operation of the entire chimney system needs a proper design and function so that smoke and toxic fumes exit the chimeny and home.

 
The main purpose of the flue liner  is  to protec the combustible parts of the home. Escaping heat from the chimney can lead to pyrolysis. Pyrolysis can decompose materials within reach simply with heat and oxygen and actually start a fire without direct contact to flame.



There are two main two reasons that pyrolysis occurs accidently in homes and starts house fires. The first is because your solid fuel stove, wood burning stove, or fireplace was installed incorrectly. The unit is too close to combustible materials such as wood trim, the edges of sheathing materials, or wood siding or flooring, and it is not code compliant.  The second reason is there is a crack or damage in your chimney liner or fireplace. Cracks allow heat and oxygen to escape and come into contact with combustible materials and heat and oxygen are all that is required for pyrolysis to occur.

The National Fire Protection Association did a test where they placed a stack of 1/8 inch thick fiberboards close to a wood burning stove and it only took 4 days for the fiberboards to ignite without direct contact to flame.


The most common type of flue liner built in homes across the United States is a clay tile flue liner. This is the case because clay tiles do an effective job of protecting the home for an average of about 25 years and yet they are inexpensive materials preferred by the vast majority of builders.

Over time, clay tiles begin to deteriorate. The most cost-effective solution is to reline the chimney and better yet installed an insert which is far more energy efficient. The cost to replace clay tiles is very expensive and involves partially tearing down the chimney in order to replace the damaged clay tiles.

Some insurance companies may pay for the cost of an insert and liner so it would be good to check with your insurance company if this condition is found.


Fireplace and the associated chimney should be inspected and cleaned annually.

 


 

 

"It is not light that we need, but fire; it is not the gentle shower, but thunder.

We need the storm, the whirlwind, and the earthquake."

Frederick Douglass

 

 


 








If you find any errors or have additional information that would expand on any code, building standards or manufacturer requirements please let me know.

 

 


 




NCW Home Inspections, LLC  is a Licensed Washington State Home Inspection service located in Wenatchee Washington serving Chelan County, Douglas County, Kittitas County, Okanogan County and Grant County Washington and the cities of Wenatchee, Leavenworth, Cashmere, Oroville, Cle Elum, East Wenatchee, Quincy and many more…  

 

Your Wenatchee and Chelan Professional Real Estate, Home and Structural Pest Inspection Service

 

Instructor- Fundamentals of Home Inspection-  Bellingham Technical College

 

WA Home Inspector Advisory Licensing Board

 

www.ncwhomeinspections.com                                                   509-670-9572

wenatcheehomeinspection.com

 

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Rainmaker
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Nina Hollander
Coldwell Banker Realty - Charlotte, NC
Your Charlotte/Ballantyne/Waxhaw/Fort Mill Realtor

Another fantastic flower picture today, Roy. New construction in the Charlotte area has focused on chimney=less fireplaces for two decades now... so much easier than maintaining a chimney.

Mar 04, 2020 04:33 AM #1
Rainmaker
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Roy Kelley
Realty Group Referrals - Gaithersburg, MD

Please be sure to leave comments at the original blog by Donald Hester.

Mar 04, 2020 06:53 AM #2
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Debb Janes EcoBroker and Bernie Stea JD
ViewHomes of Clark County - Nature As Neighbors - Camas, WA
REALTORS® in Clark County, WA

Thanks for sharing this, Roy. We sell plenty of homes with chimney flues to inspect. 

Mar 04, 2020 09:57 AM #4
Rainmaker
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Roy Kelley
Realty Group Referrals - Gaithersburg, MD

Thanks so much for your feedback. It is always good to hear from you.

Mar 04, 2020 10:12 AM #5
Rainmaker
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Roy Kelley
Realty Group Referrals - Gaithersburg, MD

Make it a habit to post a daily reblog. It is an easy way to pay it forward.

Mar 04, 2020 10:13 AM #7
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