If you have a cinder block pool, you know that it can be a great addition to your backyard oasis. However, over time, the pool can develop leaks and water damage. To prevent this from happening, it’s important to waterproof your pool. In this blog post, we’ll explore some tips and techniques for how to waterproof a cinder block pool.
1. Choose the Right Waterproofing Material
One of the first steps to waterproofing your cinder block pool is choosing the right waterproofing material. There are several types of waterproofing materials available, including liquid coatings, cementitious coatings, and waterproofing membranes. Each of these materials has its own advantages and disadvantages, so it’s important to do your research and choose the one that’s best for your pool.

2. Prepare the Surface
Before you can apply the waterproofing material, you need to prepare the surface of your pool. This involves cleaning the surface thoroughly and removing any loose debris or dirt. You may also need to repair any cracks or damage to the cinder block surface.

3. Apply the Waterproofing Material
Once the surface is prepared, you can begin applying the waterproofing material. Depending on the type of material you choose, you may need to apply multiple coats. It’s important to follow the manufacturer’s instructions carefully to ensure that the material is applied correctly and evenly.

4. Pay Attention to Joints and Corners
When applying the waterproofing material, it’s important to pay special attention to the joints and corners of the pool. These areas are often the most susceptible to leaks and water damage. Be sure to apply extra material to these areas to ensure that they are completely sealed.

5. Allow Time for the Material to Cure
After the waterproofing material is applied, it’s important to allow time for it to cure. This can take several days, depending on the type of material you used and the weather conditions. Be sure to follow the manufacturer’s instructions for curing time.
6. Test for Leaks
Once the waterproofing material has cured, it’s important to test the pool for leaks. You can do this by filling the pool with water and monitoring it for several days. If you notice any leaks or water damage, you may need to apply additional waterproofing material or make repairs.

7. Maintain the Waterproofing
Finally, it’s important to maintain the waterproofing on your cinder block pool. This may involve periodic inspections to check for leaks or damage, as well as routine cleaning and maintenance to keep the pool in good condition.
8. Consider Hiring a Professional
While it is possible to waterproof a cinder block pool on your own, it can be a difficult and time-consuming process. If you’re not confident in your ability to complete the project yourself, or if you want to ensure that the job is done correctly, consider hiring a professional. A pool contractor or waterproofing specialist can provide expert guidance and ensure that the pool is properly sealed and protected.
9. Address Drainage Issues
In addition to waterproofing the pool itself, it’s important to address any drainage issues around the pool. Poor drainage can lead to water damage and leaks, so it’s important to ensure that water is properly directed away from the pool. This may involve installing drainage systems or making changes to the landscaping around the pool.
10. Choose Quality Materials
When choosing a waterproofing material for your cinder block pool, it’s important to choose a high-quality product. Cheaper materials may be more affordable, but they may not provide the same level of protection and may need to be replaced more frequently. Investing in a high-quality waterproofing material can help ensure that your pool stays protected for years to come.

11. Stay on Top of Maintenance
Once your cinder block pool is properly waterproofed, it’s important to stay on top of maintenance. This may include regular cleaning, checking for leaks or damage, and making any necessary repairs. By staying on top of maintenance, you can help ensure that your pool stays in good condition and avoid costly repairs down the line.
Additional Tips for Waterproofing Your Cinder Block Pool
Here are some additional tips to help you ensure that your cinder block pool stays protected from leaks and water damage.
- Use a Primer: Before applying the waterproofing material, consider using a primer. A primer can help improve the adhesion of the waterproofing material and provide an additional layer of protection against leaks.
- Check for Mold and Mildew: Over time, mold and mildew can develop in and around your pool. These can cause damage to the cinder block surface and compromise the waterproofing. Be sure to regularly check for mold and mildew and address any issues promptly.
- Consider Adding a Drain: Adding a drain to your pool can help prevent water buildup and reduce the risk of leaks and water damage. A drain can also help make it easier to clean and maintain your pool.
- Don’t Skimp on Prep Work: Proper preparation is key to ensuring that your pool stays waterproofed. Take the time to thoroughly clean the surface, repair any cracks or damage, and apply any necessary primers before applying the waterproofing material.
- Check the Weather: The weather can have a significant impact on the effectiveness of your waterproofing material. Be sure to check the weather forecast and avoid applying the material during periods of high humidity or rain.
- Don’t Forget About the Pool Deck: In addition to waterproofing the pool itself, it’s important to waterproof the pool deck as well. This can help prevent water damage and extend the lifespan of the pool deck.

By following these additional tips, you can ensure that your cinder block pool stays protected from leaks and water damage for years to come. Remember to use a primer, check for mold and mildew, consider adding a drain, properly prepare the surface, check the weather, and don’t forget about the pool deck.
FAQs
How often should I waterproof my cinder block pool?
It is recommended to waterproof your cinder block pool every 5 to 7 years. However, the frequency may vary depending on factors such as climate, usage, and maintenance.
Can I waterproof my cinder block pool on my own?
Yes, it is possible to waterproof your cinder block pool on your own. However, it can be a difficult and time-consuming process. If you’re not confident in your ability to complete the project yourself, or if you want to ensure that the job is done correctly, consider hiring a professional.
What kind of waterproofing material should I use for my cinder block pool?
There are several types of waterproofing materials that can be used for cinder block pools, including epoxy coatings, rubber membranes, and cementitious coatings. Each type has its own advantages and disadvantages, so it’s important to choose a material that is suitable for your specific needs.
How long does it take to waterproof a cinder block pool?
The time it takes to waterproof a cinder block pool can vary depending on factors such as the size of the pool, the type of waterproofing material used, and the weather conditions. However, it generally takes several days to properly prepare the surface and apply the waterproofing material.
How do I know if my cinder block pool is leaking?
There are several signs that your cinder block pool may be leaking, including a sudden drop in water level, damp spots or puddles around the pool, and cracks or damage to the pool walls or floor. If you suspect that your pool is leaking, it’s important to address the issue promptly to prevent further damage.
Conclusion
In conclusion, waterproofing a cinder block pool is an important step in protecting it from leaks and water damage. By choosing the right waterproofing material, preparing the surface correctly, and applying the material carefully, you can ensure that your pool stays in good condition for years to come.
Don’t forget to pay special attention to the joints and corners, allow time for the material to cure, and test for leaks before filling the pool with water. With these tips and techniques, you can enjoy your cinder block pool without worrying about leaks or water damage. Remember to also address any drainage issues, choose quality materials, and stay on top of maintenance to keep your pool in top shape.