Choose Your Chimney Cap Material

Let's discuss the different materials available for your new chimney cap. Before selecting the material type, consider your budget, environment, and intended application. Many options are available, each with its strengths and weaknesses. We've broken them down below to help make your choice easier.

Aluminum: Aluminum caps are less common than other materials due to their lower heat tolerance. They are ideal for limited applications, such as shielding out-of-service chimneys or areas without the risk of intruding wildlife. However, it should be noted that aluminum performs well in high atmospheric salt concentrations, giving it an edge over galvanized steel caps.

Copper: Copper caps are generally the most expensive option but are also the longest-lasting. Copper naturally resists corrosion and quickly dissipates heat without warping. Over time, it develops a patina that hardens and further resists corrosion. A copper chimney cap can endure year after year without ever needing a replacement, barring extreme weather.

Galvanized Steel: Typically the least expensive chimney cap material, galvanized steel has been chemically or electrically treated to increase its resistance to corrosion. Painted versus unpainted galvanized steel caps also impact their lifespans. Unpainted galvanized steel caps usually only withstand a few years of average use, but if painted, they can extend their lifespan to 20 years under the right conditions. Galvanized steel is especially vulnerable to high atmospheric salt concentrations and is best for non-coastal regions.

Stainless Steel: These caps are more expensive than aluminum or galvanized options but are far more durable. Stainless steel caps use one of three different metal grades. 430-grade stainless steel is the least resistant, though it is still more resistant than galvanized steel. While a 430 stainless steel cap can last decades, it is unsuitable for seaside locations. 304-grade stainless steel is more resistant than 430-grade and adds resistance to acid and chemical staining, making it a great choice for operating in industrial areas. 316-grade is the most resistant, guarding against acid, chemicals, and even higher temperatures up to 500 degrees Fahrenheit.

With your material chosen, you've completed the chimney cap selection process. Congratulations! You can now choose your ideal chimney cap from our offerings. If you are still looking for something, check out our full selection of chimney caps here.