Types of Exterior Masonry Chimney Repairs Homeowners Should Know About
If you are seeing cracks or mortar loss in your chimney, you must contact masonry repair experts near you to ensure the structural integrity of the chimney stays intact. But wait, that’s not all. There are more signs that define the need for exterior masonry repairs, and there are several types of masonry repairs that you should be aware of.
It’s time to be more aware and responsible now. Here, we will talk about everything about masonry repairs, the different types, and when you actually need one.
About Masonry Chimneys and Exterior Masonry Repairs
Masonry Chimneys are of great relevance for homeowners. From improved aesthetics, to adding a great architectural character, to enjoying a cosy atmosphere during the winters, there are indeed endless reasons why homeowners in Virginia and almost everywhere love to have chimneys in their homes.
But to enjoy the perks, it is essential for you to keep a check on the health of your chimney, meaning you should be aware of when your chimney needs repairs, especially on the exterior portion.
“Why emphasise the exterior?”
Broken bricks and mortar, or any other exterior damage in your chimney, can lead to water intrusion and cause severe structural damage, which may translate into expensive repairs.
Now that you know the relevance, let’s address exterior masonry repairs and how it is different from other masonry repairs in chimneys.
What is Exterior Masonry Repair in Chimneys?
Masonry chimneys have been a top pick of homeowners in Virginia for their durability and ability to function at higher temperatures. Not just that, masonry chimneys offer excellent thermal insulation and offer better design options to fit in the architectural style of your home.
But, despite these advantages, masonry chimneys still require inspection and cleaning frequently, and any needed repairs should be addressed with utmost priority.
Exterior masonry repair refers to the work where experienced professionals address and repair the damage caused to the outer bricks of the chimney, or the concrete part that is responsible for the structural integrity of the chimney. The process also covers cracked chimney crowns, leaning or tilting of the chimney, or damaged flashing.
Types of Exterior Masonry Repairs
Chimneys are subject to harsh weather, temperature fluctuations, moisture, and structural stress in almost every season. With time, these conditions result in a range of problems in the masonry that require timely attention to ensure the chimney’s safety, functionality, and look.
Below, we discuss the different types of masonry chimney repairs, their estimated costs, and what is covered under different repair tasks.
1. Cracked, Chipped, or Missing Bricks Repair
Broken or cracked bricks are most commonly a result of water entry combined with freeze-thaw action. Water seeps into the bricks, and freezing causes the water to expand, which leads to breaking off of the bricks. General wear and tear can also lead to this situation.
| Level of Repair | Cost Estimate | What is covered under this repair | How It Should Be Prevented |
|---|---|---|---|
| Easy to Moderate | Usually, it costs from $200 to $800, which may vary based upon the number of damaged bricks and the height of the chimney. | The broken bricks need to be cut out delicately without damaging the adjacent bricks. New bricks of the same color and shape as the originals are reinstalled with new mortar applied. It is important that the mortar mix be the same as before for both appearance and strength of bonding. | To avoid damage to the bricks, waterproof sealants need to be applied onto the chimney surface every few years. Regular inspections—particularly before and after winter—also serve to detect minute cracks early before they propagate. |
2. Repointing or Tuckpointing (Deteriorated Mortar Joints)
Mortar joints deteriorate over the course of time because of exposure to rain, snow, and weather changes. Acid rain or incorrect mixtures of mortar at the time of original construction also lead to quicker decay. Water leakage makes the condition worse, as water tends to make the mortar disintegrate.
| Level of Repair | Cost Estimate | What is covered under this repair | How It Should Be Prevented |
|---|---|---|---|
| Easy to Moderate | Usually between $500 and $2,500 depending on chimney height, accessibility, total surface area. | The weakened old mortar is removed to a specified depth (typically ¾ inch), and new mortar is installed and toiled to its original finish. Tuckpointing improves the look of the chimney in addition to improving the structural strength of the chimney. | Use a superior mortar mix that is compatible with the original while building or repairing. Seal the chimney from water intrusion, and maintain regular inspections to detect loose or deteriorating mortar prematurely. |
3. Cracked or Damaged Chimney Crown
The crown of the chimney is a concrete slab on top of the chimney, intended to prevent rain and snow from entering the flue. Cracks are caused by thermal expansion, old materials, substandard original work, or insufficient slope, which creates water pooling. Know here signs your chimney crown needs repair.
| Level of Repair | Cost Estimate | What is covered under this repair | How It Should Be Prevented |
|---|---|---|---|
| Moderate to Hard | Approximately $600 to $1,500. More extensive damage and complete rebuild will cost more. | Small cracks are sealed with waterproof, flexible crown sealant. If the damage is of a higher magnitude, the crown is taken off and recast using reinforced concrete, formed with a sufficient slope and drip edge to channel water away from the chimney. | Ensure the crown is well built with water-repelling characteristics. The best way to prevent it is by applying a top-quality sealant as a protective layer every few years. Regular checkup and care are the key to detecting early cracking signs. |
4. Repairing or Replacing Faulty Flashing
| Level of Repair | Cost Estimate | What is covered under this repair | How It Should Be Prevented |
|---|---|---|---|
| Moderate | Varies between $300 to $1,000 depending upon roofing material, access complexity, and flashing material. | If minor, resealing with high-quality caulking can fix the flashing. In severe cases, the old flashing must be removed and replaced with new metal flashing, installed correctly into both the masonry of the roof and chimney using step flashing and counter flashing pieces. | Have professional technicians properly install flashing, and get it inspected at each roof maintenance cycle. Employ corrosion-resistant metals and have proper sealing in order to prolong their lifespan. |
5. Repairing a Leaning or Tilting Chimney
A leaning chimney is a serious sign of structural problems, like a compromised foundation, erosion of support soils, or mis-sized footings. It may also be caused by chronic water intrusion, which gradually weakens the interior structure, or seismic motion in certain locations.
| Level of Repair | Cost Estimate | What is covered under this repair | How It Should Be Prevented |
|---|---|---|---|
| Hard (Structural) | Between $2,500 and more than $10,000, depending upon the amount of structural damage and foundation stabilization needed. | Structural evaluation is necessary. There can be repairs that include the installation of helical piers to bear and realign the chimney foundation, reshaping parts of the chimney, or anchoring it to the structure of the home. In extreme conditions, a complete rebuild of the chimney must be done. | Right foundation design at installation is essential. Well-maintained site drainage, gutters, and a prompt lean detection with regular inspections can save it from extensive damage. |
I have an excellent hand in doing masonry work. Just show me a video, and I will do it on my own.
Okay, if you think the same way too, you most likely might end up summoning some serious trouble.
Can DIY Prove Useful in Masonry Chimney Repair?
DIY is only useful in simple and harmless repairs, such as filling little cracks in mortar or sealing a crown. Most repairs on chimneys entail working at heights, structural repairs, and water sealing, which are best left to experts. Errors can create more damage, leaks, or even chimney collapse.
DIY is ideal for:
- Replacing 1–2 ground-level bricks
- Sealing crown for small cracks
- Touching up mortar
Not Suitable for:
- Structural problems (tilting chimneys)
- Flashing replacement
- Large-scale tuckpointing
- Working at heights without suitable safety equipment
The Best Masonry Chimney Repair Services in Virginia
A Step in Time Chimney Sweeps has a team of experts who have been delivering excellent masonry chimney repair services in Virginia and other regions. Our certified technicians have years of experience and are known for top-rated services, as evident in our Google reviews.
If you are confused whether you need a repair or not, call our chimney inspectors, and we will give you a detailed breakdown of what repairs are required.
With A Step in Time Chimney Sweeps, you can stay relaxed about all types of exterior masonry chimney repairs. Call +1 (757) 244 – 6639, +1 (804) 244 – 6639 to book our service.
Connor H.
Connor is expert in understanding various chimney repair.
