Company Blog

What Is the Point of a Chimney Liner?

You have been searching tirelessly for the right historical house to make your new home, and you finally found the perfect one to buy. However, when you get the report from the Level 2 professional chimney inspection you need before you can make an offer on the home, you discover that the chimney is missing a liner. Since chimney liners were not mandated by most The Point of a Chimney Liner - Poughkeepsie NY - All Seasons Chimneylocal building codes before the 1940’s, it is not uncommon to see unlined chimneys in historic homes, and because of this, All Seasons Chimney is very familiar and experienced with bringing these chimneys up to modern safety codes and standards. For over 25 years, we have been providing professional chimney lining services to the residents of the Poughkeepsie area, and we can help you make the historical home of your dreams a reality by installing the best type of liner for the chimney. We are often asked why chimney liners are so important, and we would like to tell you more about the point of this essential chimney component.


The reason why most local cities and municipalities began mandating chimney liners in the 1940’s has to do with the results of tests given by the National Bureau of Standards (NBS) concerning the safety of masonry chimneys. According to the Chimney Safety Institute of America (CSIA), the NBS found that heat moved so quickly through an unlined chimney that it ignited the adjacent woodwork in less than three and a half hours. This is why the NBS stated that building a chimney without a liner was so unsafe that it was “little less than criminal.” All Seasons Chimney can protect your home from the risk of an accidental fire by installing a durable stainless steel liner inside your chimney to stop heat transfer from occurring.


Without a liner in place, the bricks and mortar joints of your chimney are at risk of damage by the corrosive and acidic byproducts of combustion. A chimney liner protects the masonry materials from being penetrated by flue gases, which can cause serious erosion damage. This type of masonry damage can deteriorate rapidly, and it can lead to dangerous hazards including heat transfers and carbon monoxide leaks. Our CSIA-certified chimney experts at All Seasons Chimney place your safety at the highest priority, and we can recommend the best liners to give your bricks and mortar joints the most ultimate protection against corrosive combustion gases.


A popular way to increase the energy efficiency of your home is to install a new gas insert inside your existing fireplace opening. To make sure your new fireplace insert works at its highest level of efficiency, it is important that the flue size matches the size of the insert. Typically, masonry chimneys are much larger than fireplace inserts, but All Seasons Chimney knows how to solve this problem by installing a custom sized stainless steel liner to give your insert a properly sized flue. We can also perform this service if you currently have a mismatched sized flue for your existing hearth appliance.

In order to function safely and efficiently, your chimney needs several important components, including the liner, in place. Contact us today at All Seasons Chimney to learn more about our professional chimney relining services.

We Also Clean Oil Furnace Flues

If you have an oil-burning furnace, you may not realize that you need to have its flue cleaned annually. Many homeowners believe the oil service company takes care of this task; however, the majority of oil furnace technicians will only shovel out the base of the chimney and brush the connector pipes. Additionally, these technicians will often tell you the chimney looks good, even though they do not inspect the entire chimney. Just like the chimney of a wood-burning or gas-fueled fireplace, your oil furnace flue should be cleaned annually, according to the Chimney Safety Institute of America (CSIA). Our chimney sweeps at All Seasons Chimney are experienced with cleaning oil furnace flues, and we would like to share with you some information about the importance of cleaning these flues once a year.


Why is it so important to have my oil furnace flue cleaned annually?

Your oil-burning furnace has long running cycles during the winter. These cycles produce oil soot that can stick to the flue walls and eventually fall to the base of its masonry chimney or even directly into the the top of the furnace itself. This fallen build-up of soot can cause a flue blockage, which can trap nitrogen, carbon dioxide, water vapors, and the toxic gas, carbon monoxide. Your flue should be cleaned annually to protect you and your family from carbon monoxide flowing back into your home.

What other damage can soot do to my flue?

Since soot is a combination of sulphur and carbon, it can cause your flue to begin to deteriorate. This occurs when the sulphur mixes with rainwater or water vapors and becomes absorbed into the flue tiles, which causes spalling, cracking, and flaking of your flue. A damaged flue also puts you at risk of carbon monoxide leaks.

What if I have a stainless steel flue liner?

Even though a stainless steel liner will not rust, it can become corroded by the sulphuric acid reaction of oil soot. This corrosion causes tiny pinholes to form in the liner, and this ruins the liner’s ability to contain the byproducts of combustion, such as smoke and carbon monoxide.

What can I expect from an oil furnace flue cleaning from All Seasons Chimney?

When our CSIA-certified chimney sweeps arrive, they will first set up their equipment and seal off any areas which may allow soot to enter your home. Next, our sweeps will disconnect the pipe connecting the furnace to the chimney to sweep it and then reconnect the pipe. We will then inspect the exterior and the interior of your chimney to look for potential problems. Finally, our sweeps will loosen all soot deposits and clean the flue before restarting your furnace. This sweeping and inspection is your best defense against expensive chimney and furnace repairs.

Since the best time to clean oil furnace flues is in the spring after the heavy winter usage, contact All Season Chimney today to schedule a cleaning. We guarantee we will rid your flue of all soot deposits to make it safe to use.