Remember, the inside of your chimney needs to be maintained. Proper cleaning and repairs made over the life of your chimney will prevent more costly fixes and dangers that arise from neglect. The sulfur in soot can get wet and become corrosive even to metal liners causing small pinholes to develop over time. A proper cap can prevent much of this damage.
Clay linings can chip and flake over the years and start to develop cracks and gaps. A proper inspection will apprise you of the condition of the liner and your certified chimney sweep is the one who will make the recommendation about when it is time to replace or repair your lining. Don’t leave it to your fuel man or heating contractor, that is not their job.
If your chimney is fairly short and straight it may be a good candidate for a tile liner. This method is quite common with new construction and is one of the more economical solutions. Clay tile liners are also found in many older homes with masonry chimneys. Unfortunately, once these older tiles deteriorate – retiling may be quite difficult.
Stainless Steel Liners
Woodstoves and some types of furnaces may require a stainless steel liner to meet their recommended venting requirements. A round steel liner is inserted down the chimney and serves as your flue pipe. The material can be rigid or flexible depending on the particular chimney specifications that the chimney liner is going in.
Chimneys with jogs or offsets will need a flexible solution to fit around the landscape inside the flue area. Heavier liners are generally made of 316L stainless steel, while the lighter varieties are made with 316ti stainless steel (contains titanium). Titanium adds protection from corrosion and high temperatures. Most all stainless steel liners can withstand extremely high heat, making them a good choice.
Certain types of gas appliances can use aluminum liners which are similar to stainless steel configurations. These liners are not appropriate for most common applications or wood burning fireplaces or oil burning appliances.
The Thermocrete process coats the inside of the chimney from top to bottom with a highly durable ceramic sealant. It is cost effective and ideal for use in your fireplace chimney, and in chimneys serving gas, oil, wood, or coal burning appliances. In addition Thermocrete is undergone rigorous UL Listing and it is an approved liner for gas and oil.