Not only do they protect the chimney from catching fire, but they help to prevent excess creosote build-up, as well. More costly but easier to maintain caps are made of copper and stainless steel. All three are made up of two metal layers, with a mass material and air acting as heat insulators in the first two … Different Types Of Chimney Liners. About Chimney relining: Types of Chimney Liners. In this article we’ll take an in-depth look at the different types of chimney caps and answer this burning question once and for all. When you ask people how many types of chimneys there are, they often think, “Two: the brick ones and the metal stacks.” When you ask chimney sweeps, some say “Two: masonry and prefabricated.” The rest – the ones certified by the CSIA to maintain fire safety standards, may also say two – “clean and safe, or risky.” Make sure you choose the right type of chimney cap. Each flue has its own functions. The most common type of chimney cap is a standard design to keep pests and the elements from entering. Cap type. Their removable lids make cleaning a breeze. The type of chimney cap you choose will depend upon your chimney configuration, the functions you want the cap to perform, and your individual decorating preference. Make use of this type of cap if your flue sticks an inch or more above your chimney crown. Types of Chimneys. Chimney caps are made from several different metals, including copper, aluminum, steel painted black and stainless steel. Older air-cooled chimneys used three walls and a thermosyphon design to bring outside air in and back out again to keep the chimney from getting too hot and catching the chimney chase on fire. Chimneys of the 17th and 18th centuries tended to be rectangular and to have projecting top courses that formed protective caps. Top Mount. There are three main types of liners: clay tile, metal, and cast-in-place. What is a Chimney Cap? Draft Increasing Chimney Cap – This type of cap uses the wind to create greater updraft if your chimney is prone to draftiness. Damper Cap or Lock-Top Cap. Single-flue caps are easy to install by screwing them into the flue. Disused Chimney Caps Disused chimney cowls are designed to cap off disused chimneys. The chimney liner is one of the most important parts of the system, one of the largest, and perhaps the most overlooked. The price of a chimney cap can vary greatly, depending on the material and the type of cap that you purchase–customized caps will always be more expensive. When it comes to selecting your preferred decorative chimney shroud pick, you’re spoiled for choice. Some types of chimney caps go even further in their protective abilities. A cable runs down the flue and into the fireplace. What type of chimney cap do I want? These special types of caps are great for masonry chimneys that experience downdrafts. 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