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My Fireplace Leaks When It Rains, Why And How To Deal With It?

My Fireplace Leaks When It Rains, Why And How To Deal With It?

It’s a wet evening, and you’re going to unwind in front of your fireplace. However, you discover that the prolonged, severe rain has caused water to infiltrate through the building. What are your options in this scenario?

Numerous factors might cause a fireplace to leak. These underlying problems could be anything from leaky roofs to outdated caulking. Therefore, you should first troubleshoot and look for the source of the leak. After that, proceed with the repair procedure using the appropriate technique in light of your results. These remedies consist of:

  • The chimney being sealed
  • Putting up a chimney cap
  • putting in insulation

Read on as we discuss the several potential causes of fireplace leaks during rainy weather.

What Causes My Fireplace To Leak During Rain?

My Fireplace Leaks When It Rains, Why And How To Deal With It?

A fireplace may experience leakage during rainy weather for reasons other than dried caulking. Several of these potential issues include:

Rain Falling From The Chimney’s Roof

Water entering the fireplace due to the chimney’s top not being protected is a fairly common occurrence. Installing a chimney cover could assist to lessen or perhaps solve this issue.

Building Damage

A strong force acting on the fireplace’s structure, an earthquake, or a shifting base might all result in it breaking or cracking. Because of these cracks, moisture damage to the fixture and its surroundings may result.

Condensation Accumulation

When either (1) a specific location’s air cools to its dew point or (2) the water vapor in the air becomes so heavy or saturated that it visibly condenses on nearby surfaces, condensation takes place.

In the case of fireplaces, the wet molecules are saturated by both the warm air evaporating from the building and the cold air from the rain. Condensation builds up inside and around the chimney as a result, which leads to leaks.

Leaky Roofs

Sometimes the leak originates from the roof rather than the fireplace or chimney. Verify the ceiling for any leaks. That surface’s moisture could leak into the fireplace.

Gas Fireplace Leaks

Dried caulking is one of the relatively frequent causes of water leaking from a gas fireplace when it rains. Caulk typically lasts for five years. The duration of the sealant could, however, be shortened by circumstances like bad weather.

How Can I Prevent Rain From Entering My Chimney?

My Fireplace Leaks When It Rains, Why And How To Deal With It?

Be aware that troubleshooting the problem is the first step in repairing a leaky chimney. You can proceed with the necessary course of action once you identify the problem’s root cause.

Depending on the cause of the problem, you’ll learn about potential fixes for a chimney leak caused by rain in this section.

Chimney Sealing

If your chimney leaks are caused by dried caulk, you must remove the old sealant before applying a new one. This first step can be completed using a caulk remover. However, if you don’t have access to that tool, take the following actions:

What you’ll require:

  • Useful knife
  • Cutlery made of plastic
  • Citrus snuffer
  • Nylon swab


  • To break the connection, run the utility knife around the edge of the old sealant.
  • Utilizing the plastic putty knife, remove the remaining caulking.
  • The first and second steps should be repeated as necessary.
  • Use the citrus-based remover to spray the obstinate sealant and remove it.
  • Give the stripping solution 10 minutes to sit.
  • Use the nylon brush to remove any remaining caulking.

Apply the fresh sealant to those places once the old sealant has been removed. Be aware that to achieve an airtight seal, you might also need to apply caulking to your chimney cover.

Put A Chimney Cover In

This item, sometimes known as a chimney cap, can aid in preventing rainwater from entering the fireplace via the building. But bear in mind that there are several chimney coverings for various chimney top diameters. To minimize unforeseen costs, measure the top of your chimney before making your purchase.

Furthermore, in order to reach the chimney top, you’ll probably need to ascend to the roof of your home. Asking someone to hold the ladder as you climb it will ensure that you are acting safely. A safety belt that is installed and tied around you is another option. If you slide while on the roof, you’ll still remain secure.

Following these procedures will allow you to proceed with the procedure once you have a chimney cover that fits and have finished the safety measures:

What you’ll require:

  • A chimney cap
  • Spanner wrench


  • Place the cover loosely on the top of the chimney, being careful to position it correctly.
  • Use the socket wrench to tighten the screws on the corners of the lid.

Insulation Can Prevent Condensation

Condensation can be avoided by insulation. However, the type of insulation utilized frequently affects how much moisture is controlled. So if there is a sizable amount of leakage coming from your fireplace or chimney, you might want to build some rather thick insulation.

An overview of ways to insulate the space within and around your fireplace is provided below:


  • Fix any existing problems near the fireplace (e.g. cracks, efflorescence, and mold).
  • Once corrected, take down the fireplace’s surrounding wall. Be mindful of your removal technique to prevent removing any supporting structures.
  • Place a water barrier in place. After that, insert the insulation into the opening and secure it.
  • Rebuild the wall’s removed part.

How Much Does A Leaking Fireplace Cost To Fix?

The nature and seriousness of the issue will often determine how much it will cost to fix water leaking from a fireplace. However, expect to spend between $85 to $1,600 on the project. Use of professional services may result in an increase in overhead costs.

What Is The Price To Replace A Fireplace?

The cost to replace a fireplace might be anywhere between $2,500 and $11,000. However, certain elements, such as the type of structure being built and the materials utilized in its construction, frequently affect costs.

For instance, it costs about $4,500 to construct a fireplace with a brick or stone veneer. Installing a pellet stove system, on the other hand, might be a more affordable choice because you might just have to pay $2,000 for it.

But if you want to install a gas fireplace in place of your old one, expect to pay between $4,300 and $12,000 for this installation. Additionally, electric fireplaces could be less expensive than their gas equivalents, however you might have to shell out more each month for power.

How Long Does A Fireplace Last?

To determine the longevity of the fireplace in your home, first determine its type. Brick fireplaces, for example, can survive more than a century with careful maintenance.

However, the lifespan of prefabricated fireplaces may only be 10 to 15 years. However, if you adhere to a tight maintenance schedule for it, you might double the fireplace’s lifespan.

How Is A Fireplace Maintained?

My Fireplace Leaks When It Rains, Why And How To Deal With It?

Be aware that maintaining your fireplace can help avoid problems like rain-related leaks. Maintaining a regular fireplace maintenance schedule may also help the building last longer. Therefore, heed these advice to make the most of your fireplace for years to come:

  • Tidy up the inside. Improve smoke removal by removing any residual ashes.
  • Removing soot accumulation If left unattended, this substance may even start to pose a fire risk.
  • Use only the proper wood. In order to assist avoid moisture buildup, place thoroughly dried and seasoned wood into the fireplace.


Keep in mind that a fireplace might leak water when it rains for a variety of reasons. For instance, you could need to add a chimney cover or the building may be susceptible to condensation. In order to implement the right remedy, make sure to identify the problem’s origin.

My Fireplace Leaks When It Rains, Why And How To Deal With It?

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Written by HVAC Contributor

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