What Causes a Leaky Chimney?

Do you have a masonry chimney? If you do, you may already know that the likelihood of having a leaky chimney can be quite high. Why are masonry chimneys so likely to experience water leaks? The Chimney Safety Institute of America (CSIA) answers this question by stating that water is the biggest enemy of a masonry chimney. Every component of your chimney can possibly suffer expensive and extensive damage when water penetrates into your chimney. Stained ceilings or walls, loose bricks and chipped mortar on the exterior of your chimney, and musty or moldy odors coming from your fireplace are all signs of a leaky chimney. If you have seen any of these signs, it is crucial to contact a professional chimney company like Hudson Chimney to locate the source of the leak and make repairs so that your fireplace and chimney system can function safely and properly. But, what exactly can lead to a leaky chimney? We would like to tell you four problems that allow water to easily penetrate your chimney.

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1. DAMAGED OR MISSING CHIMNEY CAPS

Chimney caps are your least expensive preventive measures against water penetration because they cover the top of your chimney. Freezing temperatures and destructive animals trying to get into your chimney can cause cracks and other damage your chimney cap. When your chimney cap is damaged (or even worse, missing completely), water from rain and melted snow can easily get into the masonry work of the interior of your chimney. Hudson Chimney offers a wide variety of chimney caps, and our certified technicians can install a custom-fitted cap to protect your chimney from water leaks.

2. DETERIORATED CHIMNEY CROWNS

Located directly beneath the chimney cap, a chimney crown is constructed from concrete and used to seal the opening of your chimney. Unfortunately, your crown could be made from the wrong or ineffective material, or it could be improperly installed. In these situations, damage and deterioration will occur sooner than later, and you will have an opening to your chimney where water can easily enter. The masons at Hudson Chimney can repair damaged chimney crowns as well as correctly install custom-made crowns to keep the water out of your chimney.

3. DAMAGED FLASHING

Flashing is sheeting made from metal that is placed between your chimney and your roof to protect this area from water leaks. Easily improperly installed, not every chimney company will the time to customize the flashing itself for a perfect fit. Our technicians will customize flashing by carefully measuring each part of your chimney and its surrounding areas on your roof so that it fits exactly and leaves no holes or cracks, which allow water penetration of your chimney.

4. WORN OUT MORTAR JOINTS

Water deteriorates the essential mortar joints that hold your chimney together and creates holes and cracks within the masonry. In the winter, water trapped in your chimney freezes and thaws, which leads to the bricks breaking and crumbling, and this will cause even more water leak problems. Fortunately, Hudson Chimney can do masonry repairs using the tuck pointing process. Once we have completed these repairs, we can apply a waterproofing treatment that will ensure that your masonry work in your chimney is protected from any water leaks in the future.

Dealing with a leaky chimney? Contact Hudson Chimney to schedule a visit from one of our certified masons to fix your water penetration problems.

How Water Can Damage Your Chimney

If your home has a masonry fireplace, you might know that the Chimney Institute of America (CSIA) has named water as the biggest enemy of your chimney. Water penetration of your chimney is the biggest cause of expensive and extensive damage to the interior and the exterior of your home. Keeping water out of your chimney is the essential key to prevent the deterioration of the entire structure. At Hudson Chimney, our CSIA-certified technicians are well aware of the damage water can do to a masonry chimney, and we can find the leak, repair the damage, and then prevent further water penetration of your chimney. Often asked by our customers how water can be such a big problem, we would like to share three ways water leaks can do lots of damage to a masonry chimney.

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1. Water leaks can cause brick and mortar spalling, which can lead to structural damage.

The exterior bricks and mortar of your chimney suffer a great deal of water exposure, and this water will penetrate into the materials, which causes them to erode. When this trapped water freezes inside your bricks and mortar, the breaking apart, cracking, and loss of masonry materials occurs when the temperatures rise and the water thaws. The expansion of the thawed water can be too much for bricks to endure, which is why they become loose and/or break off of your chimney. This phenomenon is known as spalling, and unrepaired spalling can lead to possible severe structural damage of your chimney. Additionally, water will continue to invade your chimney through the holes provided by the spalled bricks and mortar. If you ever notice loose bricks or mortar on the exterior of your chimney, contact Hudson Chimney for a chimney inspection. We will repair the damage and waterproof your chimney to prevent spalling from occurring again.

2. Water leaks can cause cracks and other deteriorations to your chimney flue liner, which can lead to carbon monoxide poisoning.

Water penetration not only affects the bricks and mortar of your chimney, but it causes damage to your interior flue liner as well. If you have a clay chimney liner, cracks will form due to water leaks, and if you have a metal chimney liner, rusting will occur from water exposure. Both of these problems can cause your liner to break apart and crack. A cracked liner can be a health hazard since your chimney liner serves to protect you and your family from the by-products of combustion, like toxic smoke and carbon monoxide, from entering your home. At Hudson Chimney, we can repair and restore clay chimney liners with HeatShield, and we can replace damaged liners with a durable stainless steel.

3. Water leaks can cause interior damage to your home, including stained walls and ceilings and mold growth.

Not only does water penetration of a masonry chimney cause many issues to the chimney itself, but a leaky chimney can also stain the ceilings and walls of the room where your fireplace is located. If you find water leak stains in your fireplace room, you should also consider the possibility of mold growth in the ceilings, walls, fireplace, and chimney. Contact Hudson Chimney as soon as possible if you ever see this sort of water penetration damage.

If you have more questions on what types of damage water penetration can do to a masonry chimney, contact Hudson Chimney today. We are happy to help you repair and prevent this kind of damage to your fireplace and chimney.