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Dave's Chimney Service
Fireplace Leaks
Since there are different types of fireplaces, there are also different reasons for chimneys to leak. I often get the call during rain season, asking for someone to come check a cap. That's usually a sign there is a leak. Until one of the guys gets there, it's almost impossible to determine the cause or the repair needed. A leaking fireplace causes more damage every year then chimney fires. Most don't realize it's a regular maintenance issue if you own a home with a fireplace, whether you use it or not! With that being said, if you know the type of fireplace you have, you will have a better knowledge of the care and upkeep for leak prevention as well.
Masonry Fireplaces are generally constructed with the exterior of brick or rock. The mortar and brick is porous and needs to be sealed periodically. In fact, a single brick on the exterior of your fireplace can hold up to 3 cup of water. You may think it only leaks when it rains, however, it's only leaking then because the bricks are already full and can't hold anymore water. Mortar beds on rock fireplaces are usually thicker, which can hold considerable amounts of water as well. The top of the fireplace has a mortar bed called a "CROWN". This must be sealed with a "Crown Coat" in order to keep it from cracking, breaking away, or leaking. A full cover cap can be installed to protect the crown, however, if it's already damaged, it should be rebuilt and sealed prior to that installation.
Zero Clearance Fireplaces are generally constructed of a single pipe coming from the roof, or a surround built on the roof that is completely for esthetics. That surround is often crafted of wood or siding to match the house, but can be of another material such as brick or rock. The biggest thing to know here, is the Chase Pan is designed to protect that empty space between the flu pipe and chase from holding water. These have to be custom built to fit your chase and the size of your pipe, and then installed. They will eventually puddle and rust, and can cause rot in an extensive area surrounding your fireplace if not maintained.
Warning Signs
You can also watch for signs, such as mold or plant life growing on your masonry fireplace. If you start to see mortar beds eroding or brick facings popping off, you are in an urgent state of needing repair. If your damper is rusted, it is also typically a sign of needing maintenance. There are other products and services, such as caps, flashings, and flashing Sealant. Our coating products we use all carry great warranties, so there's no need to worry for some years after being treated.
Masonry Fireplaces are generally constructed with the exterior of brick or rock. The mortar and brick is porous and needs to be sealed periodically. In fact, a single brick on the exterior of your fireplace can hold up to 3 cup of water. You may think it only leaks when it rains, however, it's only leaking then because the bricks are already full and can't hold anymore water. Mortar beds on rock fireplaces are usually thicker, which can hold considerable amounts of water as well. The top of the fireplace has a mortar bed called a "CROWN". This must be sealed with a "Crown Coat" in order to keep it from cracking, breaking away, or leaking. A full cover cap can be installed to protect the crown, however, if it's already damaged, it should be rebuilt and sealed prior to that installation.
Zero Clearance Fireplaces are generally constructed of a single pipe coming from the roof, or a surround built on the roof that is completely for esthetics. That surround is often crafted of wood or siding to match the house, but can be of another material such as brick or rock. The biggest thing to know here, is the Chase Pan is designed to protect that empty space between the flu pipe and chase from holding water. These have to be custom built to fit your chase and the size of your pipe, and then installed. They will eventually puddle and rust, and can cause rot in an extensive area surrounding your fireplace if not maintained.
Warning Signs
You can also watch for signs, such as mold or plant life growing on your masonry fireplace. If you start to see mortar beds eroding or brick facings popping off, you are in an urgent state of needing repair. If your damper is rusted, it is also typically a sign of needing maintenance. There are other products and services, such as caps, flashings, and flashing Sealant. Our coating products we use all carry great warranties, so there's no need to worry for some years after being treated.
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