Bentonite Waterproofing: What You Need to Know

If you are planning on waterproofing your home, you may have heard of bentonite clay. But what is it? And more importantly, is it the right choice for your project?

In this guide, we will take a look at what bentonite waterproofing is, how it works, and the benefits of using it.

What is Bentonite Waterproofing?

Bentonite waterproofing is a type of waterproofing that uses bentonite clay to create a barrier against water. Bentonite clay is a natural material that is derived from volcanic ash. It is made up of various minerals, including silicon, aluminum, and iron.

When mixed with water, bentonite clay expands and forms a gel-like substance that can fill in cracks and pores. This gel-like substance is what makes bentonite waterproofing so effective at keeping water out.

Bentonite waterproofing has been used for centuries to keep homes and buildings dry. In recent years, it has become a popular choice for waterproofing basements and crawl spaces.

Bentonite waterproofing is considered to be one of the most effective waterproofing methods available. It is also relatively easy to install, and does not require special training or equipment.

You can buy it as a membrane or you can use it for injection waterproofing.

How Does it Work?

Bentonite waterproofing works by forming a barrier between the foundation and the soil. When it rains, the water seeps into the ground, and is stopped by the bentonite. This prevents moisture from reaching the foundation and causing problems like mold or mildew. There are two types of bentonite waterproofing: internal and external.

Internal bentonite - Internal bentonite waterproofing is where the membrane is placed on the wet side of the wall. This is most effective when used in new construction, as it can be difficult to install an internal bentonite waterproofing system retroactively.
External bentonite - External bentonite waterproofing systems are designed to protect a structure from water ingress. The system comprises of a layer of bentonite clay which is placed on the external surface of the structure. The bentonite clay swells when it comes into contact with water, forming a barrier that prevents water from entering the structure.

Step By Step Installation Guide

The bentonite waterproofing process is becoming a popular option for many homeowners. Here is a step-by-step installation guide to help you get started.

What you need:

Instructions:

Step 1:
Mixing the bentonite

Start by mixing the bentonite clay with water in a bucket. Use a ratio of one part clay to two parts water. Mix it until it forms a slurry-like consistency. If it’s too thick, add more water; if it’s too thin, add more clay.

Step 2:
Applying the bentonite

Next, use a trowel to apply the bentonite slurry to the surface you’re waterproofing. Start at the bottom, and work your way up. Make sure to evenly coat the entire surface. To do this, you may need to apply the bentonite in multiple thin layers.

Step 3:
Letting it dry

Once you’ve applied the bentonite, let it dry completely. This can take anywhere from 24 to 48 hours. Once it’s dry, you’ll need to brush away any excess clay that’s left on the surface. This can be done with a stiff-bristled brush.

Step 4:
Applying a second coat (Optional)

In some cases, you may need to apply a second coat of bentonite. This is usually only necessary if the first coat wasn’t applied evenly, or if it was too thin. If you do need to apply a second coat, follow the same steps as before.

Step 5:
Adding a topcoat (Optional)

Once you’ve applied the bentonite, you may want to add a topcoat. This isn’t always necessary, but it can help extend the lifespan of your waterproofing job. To add a topcoat, simply apply a thin layer of asphalt or tar over the bentonite.

Just like that, you’ve now successfully waterproofed your surface using bentonite clay. This natural material is an effective way to keep your home dry, and it’s also environmentally friendly.

Benefits of Bentonite Waterproofing

Bentonite waterproofing has many benefits. Some of the most notable benefits include:

If you are looking for a safe, durable, and cost-effective waterproofing solution, bentonite waterproofing is a great option to consider.

Frequently Asked Questions

Do I need sodium bentonite for my foundation walls?

No, you don’t need sodium bentonite for your foundation walls. Sodium bentonite is a type of clay that expands when it comes into contact with water. This expansion can cause problems with your foundation, so it’s best to avoid using it.

Do water intrusion membranes work with bentonite basement waterproofing?

Yes, water intrusion membranes can be used with bentonite basement waterproofing. Water intrusion membranes are placed over the bentonite to provide an additional layer of protection against water.

Do waterproofing membrane and vapor barrier membrane work with bentonite waterproofing?

Yes, both waterproofing membranes and vapor barrier membranes can be used with bentonite waterproofing. These membranes will provide an additional layer of protection against water and moisture.

Bentonite waterproofing is an effective and affordable way to waterproof your home. It is important to understand how it works, and what you need to do to maintain it. With proper care, bentonite waterproofing can last for many years.

If you have any questions or concerns about bentonite waterproofing, be sure to speak with a professional. They can help you determine if this is the right waterproofing solution for your home.