Redgard Vs Kerdi: Which Waterproofing System Reigns Supreme?

Redgard and Kerdi are both waterproofing and crack prevention membranes used for shower walls. While Redgard is easier to apply and requires only one coat, Kerdi offers a more reliable and durable solution.

The cost of Kerdi is higher, but it provides better long-term protection compared to Redgard.

Redgard Waterproofing System

Redgard Waterproofing System

Features of Redgard

Redgard is a high-quality waterproofing system that is specifically designed for shower and bathroom applications. It acts as a protective membrane, creating a waterproof and crack-resistant barrier. The key features of Redgard include:

  • Easy application process
  • Superior waterproofing properties
  • Crack prevention capabilities
  • Durable and long-lasting
  • Compatible with a variety of surfaces

Benefits of Redgard

Using Redgard for your waterproofing needs comes with several benefits:

  • Effortless application: Redgard is extremely easy to apply, making it suitable for both DIY enthusiasts and professionals. Its paint-like consistency allows for smooth and even coverage.
  • Enhanced durability: Redgard forms a strong and flexible membrane that can withstand the movement and shifting of the structure, preventing cracks and leaks.
  • Cost-effective: Compared to other waterproofing systems, Redgard offers excellent value for money. Its longevity and effectiveness reduce the need for costly repairs in the future.
  • Versatility: Redgard is compatible with a wide range of surfaces, including cement boards, drywall, concrete, and existing tile. This makes it a versatile option for various shower and bathroom applications.
  • Crack resistance: The unique formula of Redgard ensures that it remains flexible even after drying. This flexibility allows it to absorb any movement in the substrate without cracking or compromising the waterproofing properties.

Pros and Cons of Redgard

Like any product, Redgard has its own set of pros and cons:

Pros Cons
Easy application process Can be slightly expensive compared to other alternatives
Excellent waterproofing properties Requires proper ventilation during application
Crack prevention capabilities Requires multiple coats for optimal performance
Durable and long-lasting Thin consistency can make it difficult to achieve thick coverage
Compatible with a variety of surfaces May not adhere well to certain existing tile surfaces

Redgard Application Process

Applying Redgard is a straightforward process that can be completed by following these steps:

  1. Clean and prepare the surface by removing any dust, dirt, or debris.
  2. Mix Redgard thoroughly according to the manufacturer’s instructions.
  3. Apply the first coat using a roller or brush, ensuring even coverage.
  4. Allow the first coat to dry completely before applying subsequent coats.
  5. Apply additional coats as necessary to achieve the desired thickness and coverage.
  6. Make sure to follow the recommended drying times between coats.
  7. Inspect the completed application for any missed areas or inconsistencies.
  8. Once fully dry, the surface is ready for tiling or further finishing.

Kerdi Waterproofing System

The Kerdi Waterproofing System is a revolutionary solution for ensuring water-tight and durable shower installations. Developed by Schluter Systems, a leader in the tile industry, Kerdi offers a seamless and reliable approach to waterproofing that surpasses traditional methods. Whether you are a DIY enthusiast or a professional contractor, the Kerdi system provides exceptional performance and long-lasting results. In this section, we will explore the features, benefits, and application process of the Kerdi Waterproofing System.

Features of Kerdi

Before we delve into the benefits of Kerdi, let’s take a closer look at its standout features:

  • Crack Prevention: The Kerdi membrane acts as a barrier that resists cracks, ensuring the longevity of your shower installation.
  • Waterproofing: With Kerdi, you can have peace of mind knowing that your shower walls are protected against water damage.
  • Vapour Management: The Kerdi system controls vapour diffusion, reducing the risk of mold and mildew growth.
  • Easy Installation: Kerdi is user-friendly and can be applied directly to the substrate, offering a hassle-free installation process.
  • Versatility: The system is suitable for a wide range of substrates, including drywall, cement board, and gypsum board.

Benefits of Kerdi

Choosing the Kerdi Waterproofing System for your shower installation comes with several advantages:

  • Reliable Waterproofing: Kerdi provides a watertight seal, preventing water from seeping into the walls and causing damage.
  • Long-lasting Durability: Thanks to its crack resistance and exceptional adhesion properties, Kerdi ensures a lasting shower installation.
  • Time and Cost Savings: The easy application process of Kerdi saves you time and labor costs, making it an efficient choice.
  • Prevents Mold and Mildew Growth: By controlling moisture and vapor diffusion, Kerdi minimizes the risk of mold and mildew growth, promoting a healthier environment.
  • Flexibility in Tile Selection: Once Kerdi is installed, you have the freedom to choose any tile you desire, knowing that the waterproofing is already taken care of.

Pros and Cons of Kerdi

Let’s weigh the pros and cons of the Kerdi Waterproofing System:

Pros Cons
Reliable and long-lasting waterproofing Higher initial cost compared to traditional methods
Time and cost savings in installation Requires careful surface preparation
Prevents mold and mildew growth Dependent on proper installation techniques
Flexibility in tile selection

Kerdi Application Process

The application of Kerdi involves the following steps:

  1. Prepare the substrate by ensuring it is clean, dry, and free of any contaminants.
  2. Cut the Kerdi membrane to size, leaving a 2-inch overlap onto adjacent walls or floors.
  3. Apply thin-set mortar to the substrate using a trowel, ensuring a consistent layer.
  4. Press the Kerdi membrane onto the thin-set mortar, starting from the bottom and smoothing it out as you go.
  5. Continue applying the Kerdi membrane to all desired areas, overlapping the edges and corners for a secure seal.
  6. Use a notched trowel to comb thin-set mortar over the Kerdi membrane, ensuring proper coverage.
  7. Once the mortar has cured, install your chosen tiles using the recommended tile adhesive.

By following these steps, you can achieve a reliable and waterproof shower installation using the Kerdi system.

Comparison Between Redgard And Kerdi

When it comes to waterproofing membranes for showers and other tiled surfaces, two popular options are Redgard and Kerdi. Both products have their own strengths and considerations, so it’s important to understand their differences before making a decision. In this article, we will compare Redgard and Kerdi in terms of performance and durability, waterproofing effectiveness, ease of application, and cost. Let’s dive in!

Performance and Durability

To evaluate the performance and durability of Redgard and Kerdi, it’s crucial to consider their ability to withstand moisture, cracks, and time.


  • Creates a waterproof membrane that prevents water penetration and protects against leaks.
  • Offers excellent crack resistance, ensuring the longevity of your tiled surface.


  • Delivers exceptional performance against water infiltration, offering reliable waterproofing capabilities.
  • Provides a durable barrier that protects against cracks and ensures the longevity of your tile installation.

Waterproofing Effectiveness

The effectiveness of a waterproofing membrane is crucial in preventing water damage and ensuring the integrity of your tiled surface.


  • Creates a highly effective waterproof barrier, providing reliable protection against moisture.
  • Offers excellent waterproofing capabilities, making it suitable for various applications such as showers and bathtub walls.


  • Boasts outstanding waterproofing capabilities, offering reliable protection against water infiltration.
  • Designed specifically for showers and other wet areas, it provides a robust waterproof barrier.

Ease of Application

When it comes to choosing a waterproofing membrane, ease of application is an essential factor to consider. Let’s take a look at the application process for Redgard and Kerdi.


  • Applying Redgard is as easy as painting a wall, making it a user-friendly option.
  • Can be easily applied with a brush, roller, or spray, allowing for flexibility in the application process.


  • Requires proper installation techniques to ensure proper waterproofing, which may involve more steps than Redgard.
  • However, when installed correctly, it provides a reliable and effective waterproof barrier.

Cost Comparison

When considering different waterproofing options, the cost is a significant factor that can influence your decision. Let’s compare Redgard and Kerdi in terms of cost.

Product Cost
Redgard Affordable
Kerdi Relatively higher cost

While Redgard offers an affordable option for waterproofing, Kerdi generally comes at a higher price. It’s essential to consider your budget and project requirements when making a decision.

In conclusion, both Redgard and Kerdi are reliable options for waterproofing tiled surfaces. Redgard offers excellent performance, waterproofing effectiveness, and ease of application at an affordable cost. On the other hand, Kerdi excels in its waterproofing capabilities and durability, albeit at a higher price point. Consider your specific project needs and budget to make an informed decision in choosing between Redgard and Kerdi.

Real-Life Testing And Results

When it comes to waterproofing your shower, two popular options have gained attention among homeowners and professionals – Redgard and Kerdi. To help you make an informed decision, it is crucial to examine real-life testing and results of both products. Let’s dive into their individual performances and see how they stack up against each other.

Redgard Testing and Results

Redgard has been put to the test in various scenarios to determine its effectiveness as a waterproofing solution. One real-life test involved subjecting Redgard to a flood test, simulating potential water damage that can occur within a shower. The results were astonishing, with Redgard creating a reliable waterproof membrane that resisted cracks and prevented water from seeping through.

In another test, Redgard was applied to different surfaces, including bathtub walls. The application process was found to be straightforward, making it accessible even for those without extensive experience. Its ability to bond with thinset and provide a crack-resistant barrier has made it a popular choice among professionals and DIY enthusiasts alike.

Redgard Testing Highlights Redgard Testing Results
• Flood test • Reliable waterproof membrane
• Application on various surfaces • Easy to apply even for amateurs
• Bonding with thinset • Crack-resistant barrier

Kerdi Testing and Results

Similarly, Kerdi has undergone rigorous testing to establish its performance as a waterproofing solution. While Kerdi is typically more expensive, its reputation for reliability and quality cannot be overlooked. In comparison to Redgard, Kerdi has been favored for its compatibility with thinset and its ability to create a tight bond with the tile, ensuring a secure and durable shower enclosure.

Test results for Kerdi have shown that it effectively prevents moisture from compromising the integrity of the shower walls. Its application process may require more expertise, but the end result justifies the extra effort. The combination of the Kerdi fleece and thinset creates a robust barrier against water infiltration, making it a favorite among industry professionals.

Kerdi Testing Highlights Kerdi Testing Results
• Compatibility with thinset • Secure and durable shower enclosure
• Creating a tight bond with the tile • Effective prevention of moisture
• Professional-grade reliability • Robust barrier against water infiltration

Comparing the Results

When comparing the results of both Redgard and Kerdi, several key factors emerge. Redgard offers simplicity and accessibility, making it an ideal choice for DIY projects. Its reliability and crack resistance are commendable, providing peace of mind to homeowners concerned about potential water damage.

On the other hand, Kerdi showcases professional-grade reliability and a tight bond with the tile, ensuring a long-lasting and secure shower enclosure. While it may require more expertise during the application process, its proven ability to prevent moisture infiltration makes it a top choice among industry professionals looking for durability.

In conclusion, both Redgard and Kerdi have shown impressive results in real-life testing. It ultimately comes down to personal preference and the specific requirements of your project. Consider factors such as ease of application, budget, and desired level of reliability when making your decision. Whichever option you choose, you can rest assured that both Redgard and Kerdi have proven their worth in creating waterproof and durable shower enclosures.

Professional Opinions And Recommendations

When it comes to waterproofing shower walls, two popular systems that professionals often consider are Redgard and Kerdi. Both options have their pros and cons, and it’s important to get insights from industry experts to make an informed decision. In this section, we will explore the expert opinions on Redgard and Kerdi and provide a final verdict on which system to choose.

Expert Opinions on Redgard

Many professionals in the construction and remodeling industry have positive opinions about Redgard. They praise its ease of use and versatility. Being a liquid-applied membrane, Redgard can be easily applied to various surfaces such as cement board, drywall, and concrete. Its crack-resistant properties make it a reliable option for preventing leaks and water damage.

Experts also appreciate the cost-effectiveness of Redgard. It is a budget-friendly option compared to other waterproofing systems like Kerdi. Its one-gallon coverage per shower makes it an economical choice for contractors and DIY enthusiasts alike.

Additionally, Redgard has gained popularity for its compatibility with other materials and products. It can be used with various types of tile adhesives and thinsets, making it versatile in different installation scenarios. Its compatibility with other shower components, including valves and fixtures, has been noted by many professionals. In most cases, a gasket behind the valves can prevent moisture issues, and the bond between Redgard and thinset helps create a reliable waterproof barrier.

Expert Opinions on Kerdi

Kerdi, a popular waterproofing system manufactured by Schluter, also receives praise from industry experts. Many professionals consider Kerdi to be a reliable and long-lasting choice for shower waterproofing.

Experts appreciate the fact that Kerdi is a premade, fabric waterproofing membrane. Its consistency and uniformity provide peace of mind for contractors and homeowners, ensuring consistent coverage and performance. The fleece-like material of Kerdi creates a strong bond with thinset, making it a secure and robust waterproofing option.

Although Kerdi is usually a bit more expensive compared to other systems like Redgard, professionals argue that it offers superior performance and reliability. Its durability and resistance to cracking and moisture make it a trusted choice for long-term water protection.

It’s worth mentioning that some experts emphasize the importance of proper installation techniques with Kerdi. Following Schluter’s installation guidelines and using the recommended accessories will ensure optimal performance and the best possible results.

Final Verdict: Which System to Choose?

After considering professional opinions and recommendations, the choice between Redgard and Kerdi ultimately depends on your specific needs, budget, and personal preference.

If you are looking for a budget-friendly option that is easy to use and compatible with various materials, Redgard could be the right choice for you. Its cost-effectiveness combined with its crack-resistant properties make it a reliable option for preventing leaks in shower installations.

On the other hand, if you prioritize long-term durability and reliable performance, Kerdi might be the better option. Its fabric membrane and strong bond with thinset offer peace of mind and ensure superior water protection. If you are willing to invest a bit more in your shower waterproofing system, Kerdi is worth considering.

Ultimately, it is recommended to consult with a professional and consider the specific requirements of your shower project before making a final decision. Both Redgard and Kerdi have their unique advantages, and choosing the right system will depend on your specific needs and preferences.

Frequently Asked Questions For Redgard Vs Kerdi

Is Redguard Good For Shower Waterproofing?

Yes, Redguard is good for shower waterproofing. It creates a waterproof and crack-resistant membrane and is easy to apply. It can be used on shower walls with just a single coat. It is a reliable and cost-effective alternative to other waterproofing systems like Kerdi.

Can I Use Redguard With Kerdi?

Yes, you can use Redguard with Kerdi. Redguard is designed to enable thinset to bond to it, and the Kerdi fleece bonds with thinset, making them compatible for use together.

Can Redgard Be Used On Shower Walls?

Yes, RedGard can be used on shower walls for waterproofing and crack prevention. It is a single-coat membrane that is easy to apply, making shower installation and waterproofing a simplified process. RedGard creates a waterproof and crack-resistant barrier, providing protection for your shower walls.


Both Redgard and Kerdi are reliable waterproofing options for shower installations. Redgard is easy to apply and requires only one gallon for most showers, while Kerdi can be installed over drywall. While Redgard may be less expensive, Kerdi is known for its quality.

Ultimately, the choice between the two will depend on specific project requirements and personal preferences. Whichever option you choose, ensuring proper waterproofing is essential for a successful and long-lasting shower installation.

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