Most prefabricated fireplaces will require a chimney cap, and any fireplace that is made from metal will need a cap to keep small animals and birds away from the chimney, and help with keeping rain out of the area. When it is raining, a chimney cap can prevent the water from running down the chimney chute and damaging your fire. Metal chimneys are usually constructed of two or three layers of metal with some insulation in between each layer. Without the right, tight-fitting chimney cap, moisture and water can settle into the layers and start eroding the chimney and make it ineffective.

Most chimney caps come directly from the manufacturer of the same chimney, as these are specifically designed for the type of chimney that you have installed. If you require a replacement, or your previous chimney cap is eroding or deteriorating, you may need to contact a professional for a restoration and reinstallation. A special cap will be required to regulate cooling in the event the vents are closed. Some chimney caps are pre-installed with circulation fans that can make your entire fireplace and chimney system much more efficient.

A standard cap is made from stainless steel and manages any exposure to smoke, rain, and other weather elements. A draft increasing cap can be installed on the cross section of the chimney, and can help regulate the air flow effectively. Integral damper mechanisms can help with wasted energy, and will help you with customized sizes and designs. A customized cap may be needed for a chimney that has multiple flues, and is available in aluminum, brass, and other materials that can serve as an enhancement. An electric draft increasing cap has electric fans built into it, making it very easy and simple to control the draft in your fireplace.

Chimney caps can be made from aluminum, copper, steel, and stainless steel. Stainless steel is the most common type of cap, and may have a mesh insert to keep out small animals as well. The caps are simply mounted on the end of the chimney and secured tightly within the flue tile. Depending on the type of flue you have, there are various types of caps readily available. Some of them can help with regulating the draft and air flow, while others have integrated damper mechanisms for extra control. These will vary by manufacturer, style, and type of chimney construction you have.