A chimney chase top is sometimes confused with a chimney cap. The difference is, a cap covers just the flue opening at the top of the chimney, where the chase top covers the entire top of the chimney. Think of it as the lid on a shoebox. These metal coverings are excellent at shielding the chimney from water intrusion. Chase tops are found on chimneys connected to factory-built fireplaces. The chase is a wood framed structure that contains the double walled chimney pipe used with manufactured fireplaces. These structures can be covered with siding to match the home, stone or brick facing.
Faulty chimney chase tops can lead to serious water damage and fireplace drafting issues – this is why annual chimney inspection is so important. While chimney chase tops do a great job at protecting against water when it is new, most styles are prone to rust and will need to be replaced every seven to 10 years.
When a chase top is in disrepair, it can allow water to infiltrate the chimney system and cause significant damage. If the problem isn’t detected soon enough, a leaky chimney can end up causing deterioration of the firebox, rotting wood and damage that requires expensive fixes.
Additionally, badly deteriorated chase tops leave the chase open to obstructive elements. Things such as leaves, twigs, small tree branches, dust, small animal nests and small dead animals.
You can spot problems with your chimney chase top by checking the exterior of your chimney. If the chase top is rusted, you’ll notice a discoloration as rusty water spills down the sides of the chimney. Rusting is caused by the heat degradation of the coating used on certain chase tops. Another sign of damage is water on the floor of the firebox or dampness on the firebox walls.
A certified chimney sweep should be called in to replace the chase top before it allows significant water into the chimney. Excess water can result in damage to chimney masonry facing or siding, rotting of the home’s building materials or in a dangerous mold outbreak and more.
If there is damage to your chimney chase top – or if you suspect there is – call Complete Chimneys for a thorough chimney inspection and chimney chase top evaluation.
Chimney chase tops are most often constructed of aluminum, copper, stainless steel or galvanized steel. Each material has advantages and disadvantages. Here are some of them.
Complete Chimneys of Pasadena, MD, is ready to help residents with all manner of chimney chase top issues. We’re chimney leak specialists and experts in chimney inspection, chimney cleaning, chimney repair and all the services you need to keep your home safe and warm.
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