A chimney rain cap is a chimney cover that performs multiple functions. The use of a chimney rain cap prevents internal damage from factors such as snow and rain. It stops harmful fire sparks from escaping up the chimney and onto the roof. chimney rain caps also keep birds, squirrels, and other animals from entering the house through the chimney and making a nest. Finally, chimney rain caps prevent leaves and tree branches from entering during storms.
A chimney rain cap is often made of steel or copper and comes in a variety of shapes and colors. It should be selected based on the style and needs of the chimney. A chimney rain cap’s size must be determined through measuring. Measure the length of both ducts first, then the breadth. Next, measure the width and length of the entire chimney crown. Finally, measure the height of the tallest flue, leaving five inches above the screen to allow a draft to pass through.
These dimensions apply to various flue chimneys. A single flue is identified by a single clay liner emerging from the top of the chimney. The only measurement required for this type is the top of the clay liner.
Rain should be kept out of the chimney since it can cause significant damage to the interior. It reacts with creosote inside the chimney, causing the mortar in the firebox and chimney to deteriorate. Furthermore, it rusts the metal parts of the fireplace, such as the regulator. If water and snow accumulate inside the chimney, it will deteriorate over time. Because stainless steel is specifically engineered to prevent rust and corrosion, it is the best sort of rain cap to use.
Because of its role in keeping fire sparks inside the chimney, a chimney rain cap is also known as a spark arrestor. A fire, if left unattended, might send sparks flying into the roof or the yard, and an unattended fire is never a smart idea. Because of the danger posed by sparks, some localities have ordinances requiring a chimney cover.
Because of its function as a cover, a chimney rain cap is sometimes known as a crown. A cap covers the mortar on top of the chimney as well as the interior of the chimney. It allows gases to escape while yet providing the finest technique for properly covering chimneys and containing flames.
WHY INSTALL A CHIMNEY RAIN CAP?
The chimney rain cap serves numerous functions, including:
- The management of the draw;
- Protection against rain and humidity;
- Protection against the risk of fire;
- Animal protection.
Draw management
The chimney rain cap plays an important role in the combustion process that occurs in a chimney. It has the ability to draw in smoke. The suction pressure exerted by the chimney rain cap determines the draft that happens in the chimney. As a result, when the draft is insufficient, it becomes blocked in the hearth. This impedes the fire’s sustenance.
Protection against rain and humidity
The second function of a chimney rain cap is to protect the flue and chimney stack from rain and high winds. Concretely, it prevents water drops from entering the conduit and consequently, the growth of mold. It also permits the chimney to retain internal temperature, which ensures good combustion.
Protection against the risk of fire
If the firewall protects against fire within the house, the chimney rain cap guards against fire outside. In actuality, a spark could land on the roof and ignite a fire if there is no chimney rain cap. There are also chimney rain caps specifically designed for this purpose.
animal protection
An exposed chimney flue is unquestionably a haven for birds and bats. This is not only hazardous to these animals, but it can also impede the flue and prevent smoke from being evacuated.