The ABCs of Chimney Flashing: Understand the Basics to Get Your Home Protected

Chimney flashing is designed to protect the chimney from water damage and seepage. It’s important to use the correct type of flashing for your chimney, as many popular materials don’t hold up to the harsh weather conditions. There are different varieties of flashing for chimneys that vary in cost, durability, and other factors. Here we’ll take a look at four different types of chimney flashing and explain their proper applications.

Aluminum flashing is the most common type used for chimneys. Aluminum is lightweight, cost-effective, and can be easily formed to fit almost any chimney shape. Unfortunately, aluminum can corrode fairly quickly when exposed to treated lumber or weathering elements such as rain, snow, and ice. It is also not best suited to withstand high temperatures. This type of flashing is popular amongst contractors and can be bought in large rolls to be cut and adjusted to fit individual chimneys.

Vinyl flashing is another lightweight and cost-efficient option. This material is not as durable as aluminum and can become brittle with extreme weather conditions and temperatures. However, it can be a suitable choice in areas without harsher weather conditions. Vinyl is also not the best material to resist corrosion, so it may not last as long as some of the other materials.

Steel flashing is probably the sturdiest type for chimney flashing and is treated with zinc for added resistance against corrosion or rust. It is heavier than aluminum or vinyl and can be more cost-prohibitive, although it is very durable in general. Steel has the ability to handle high temperatures and other weathering elements and is also treated with zinc for added protection.

The last type of chimney flashing is copper flashing. Copper is one of the most durable options available and is a better choice for areas with extreme weather conditions and temperatures. Copper is lightweight and won’t break or crack easily, however it is far more costly than the other materials. Copper needs to be installed with a special sealant to keep moisture and humidity out. It is also not very pliable so it can be difficult to fit it to certain chimney shapes or angles.

Each type of chimney flashing has its own pros and cons. Ultimately, it is important to do some research and determine which type of flashing is the best for your roof and chimney, as well as how much you can spend. Additionally, always check with a professional to ensure proper installation for all types of flashing. Taking the time to find the right material and install it correctly could save you time and money in the long run.