Chimney Waterproofing: One Application Equals Years of Leak Protection

At Beck’s Chimney, we work hard to keep Noblesville fireplaces and chimneys standing strong and functioning safely for years to come…and this often includes providing suggestions for preventing chimney leaks. One important service our team specializes in is chimney waterproofing – one of the best ways to protect your masonry chimney against water damage.

Ready to invest in waterproofing services for your masonry chimney in Central Indiana? We’re here to help. Call or schedule something online with us now.

How Does Chimney Waterproofing Work?

We use a professional-grade water repellent that’s formulated specifically for masonry chimneys. What it does is twofold:

  1. prevents water molecules (which are larger) from entering the porous masonry from the outside
  2. allows vapor molecules (which are smaller and released when your fireplace is in use) to escape the porous masonry

What does this mean when all is said and done? Water from the outside can’t damage your masonry, and vapor from the fire can’t get stuck inside and deteriorate masonry. It’s a delicate balance, but one our techs have mastered.

All in all, homeowners love our chimney waterproofing system because it keeps their chimneys protected for decades and it doesn’t leave a sheen or alter the look of the chimney in any way. Ready to learn more? We’re here for you. Call or reach out online now.

Flash Seal Crown Seal Water Seal - After

When Should Chimney Waterproofing Be Done?

Chimney waterproofing is typically best done during dry weather conditions when there is no rain expected for at least 24 to 48 hours after application. This ensures that the waterproofing materials have sufficient time to cure and create a strong barrier against moisture penetration.

Ideally, chimney waterproofing should be done in the spring or summer months when the weather is warmer and drier. However, if waterproofing is urgently needed due to existing leaks or damage, it can be done at any time – as long as there is a dry weather window available for application and curing.

It’s important to thoroughly inspect the chimney for any existing damage or deterioration before applying waterproofing materials. Any cracks, gaps, or other issues should be addressed and repaired before waterproofing to ensure maximum effectiveness.

How Long Does Chimney Waterproofing Last?

The longevity of chimney waterproofing can vary depending on several factors, including the quality of the materials used, the application technique, and the level of exposure to moisture and weathering.

Generally, a properly applied chimney waterproofing treatment can last anywhere from 5 to 10 years or more. High-quality waterproofing materials and professional application may result in longer-lasting protection.

However, it’s essential to monitor the condition of the chimney regularly and reapply waterproofing as needed.

Signs that chimney waterproofing may need to be reapplied include:

  1. Water leaks or stains inside the home near the chimney.
  2. Visible damage or deterioration to the waterproofing layer, such as cracking, peeling, or flaking.
  3. Efflorescence or white, powdery residue on the chimney surface, indicating water penetration and mineral deposits.
  4. Increased moisture absorption by the chimney masonry, leading to deterioration or spalling.

Reapplying waterproofing before significant damage occurs can help maintain the integrity of the chimney structure and prevent costly repairs in the future. Additionally, investing in regular chimney inspections and maintenance can help identify any issues early and ensure that the waterproofing remains more effective over time.

Reach out online with questions.

Flash Seal Crown Seal Water Seal - After

Can I Waterproof My Chimney Myself, or Do I Need a Professional?

Many homeowners feel comfortable tackling home DIY projects themselves, and since waterproofing agents seem to be readily available in stores or online, many wonder…why not tackle the job over the weekend and save some money?

Well, we don’t advise this. Chimney waterproofing requires more technical knowledge than one might think. Missing any area of the chimney will leave the entire system vulnerable, and the chimney needs to be thoroughly assessed before the job even begins.

For instance, if your chimney requires work ahead of time, like repairing damaged masonry, installing or replacing flashing, or tuckpointing services, having an expert get the job done right is imperative…otherwise your waterproofing will be done for nothing, and you’ll still have issues down the line.

Along with this, using the right products is imperative. Many store-bought sealants, sprays, or paints aren’t actually vapor-permeable, which is a must when dealing with chimneys that need to vent out fumes and smoke.

And don’t forget that professionals have the equipment to safely navigate high-up areas and stay safe on your roof. All in all, this is a job best left to the pros.

Becks Chimney Water Seal

Will Chimney Waterproofing Affect the Appearance of My Chimney?

Chimney waterproofing should not alter the appearance of your chimney if done properly and with the right materials and techniques.

Many waterproofing products are designed to be transparent or low-sheen, meaning they won’t change the color or texture of the chimney surface. They are formulated to penetrate the masonry or form a thin, protective layer that allows the natural appearance of the chimney to remain visible.

However, some waterproofing products may have a slight sheen or gloss once applied, which could alter the appearance of the chimney surface to some extent. It’s essential to choose a waterproofing product that is suitable for your chimney’s material and desired aesthetic. This is another reason why trusting a professional to tackle the job is so important! 

When done correctly, chimney waterproofing should simply provide long-lasting protection against moisture penetration without significantly altering the appearance of your chimney. If you have specific concerns about how waterproofing may affect the look of your chimney, schedule now! We’re here to help.

What Are the Signs That My Chimney Needs Waterproofing?

Not sure if you’re due for a chimney waterproofing service? Here are some signs to watch for:

  • Water leaks and damage: If you notice water stains on the ceiling or walls near your chimney, it could indicate that water is seeping through the chimney structure. This is a clear sign that the chimney may need waterproofing to prevent further water damage.
  • Deterioration of chimney materials: Cracked or spalling bricks, crumbling mortar joints, or deteriorating chimney crowns are signs of water damage. Waterproofing can help prevent further deterioration by keeping moisture out of the chimney structure.
  • Efflorescence or discoloration: Efflorescence appears as white, powdery deposits on the surface of masonry. It occurs when water-soluble salts leach out of the masonry as water evaporates. Efflorescence is a sign of moisture infiltration and indicates that the chimney may benefit from waterproofing.
  • Mold or mildew growth: Moisture buildup inside the chimney can create ideal conditions for mold and mildew growth. If you notice mold or mildew inside or around your chimney, it’s a sign that water may be entering the chimney and that waterproofing may be necessary.
  • Foul odors: Water infiltration can lead to unpleasant odors inside the chimney, caused by mold, mildew, or decomposing organic matter. Waterproofing can help prevent moisture buildup and eliminate these odors.

If you notice any of these signs, it’s essential to address the issue promptly to prevent further damage to your chimney and home. Consult with one of our professional chimney technicians, so we can assess the extent of the damage and determine the best solutions for your chimney.

Call us for Chimney Waterproofing in Central Indiana

Chimney waterproofing is a crucial aspect of maintaining the integrity and longevity of your chimney masonry and structure. By investing in professional services with us, you can protect your chimney from moisture damage, extend its lifespan, and ensure the safety and efficiency of your fireplace or heating system. 

Don’t wait until problems arise – take proactive steps to safeguard your chimney today and enjoy peace of mind for years to come. Contact us now to schedule your chimney waterproofing service and protect your home investment.


Another solution to your chimney leak could be having a chimney cap installed or replaced. Give us a call to figure it out.