bathroom waterproofing

Removing Waterproofing from Exterior Walls

\"Waterproofing\"waterproofing.jpg” />

If you have exterior walls that have been treated with a waterproofing product, but now you need to remove that layer for any reason, it’s important to know the correct techniques to do so effectively. While waterproofing is designed to be durable and long-lasting, there are situations where its removal becomes necessary. In this article, we will explore some effective techniques for removing waterproofing from exterior walls. So, let’s dive in!

1. Assessing the Situation

Before rushing into removing waterproofing from your exterior walls, it’s crucial to assess the situation first. Consider the following factors:

  • Age of the waterproofing: If the waterproofing has been applied recently, it might be more challenging to remove. Older waterproofing layers tend to degrade over time, making them easier to take off.
  • Type of waterproofing product: Different waterproofing products have different compositions, which dictate the best removal method. It’s essential to identify the type of waterproofing you have applied.

Once you have assessed the situation, you can proceed with the appropriate technique for removing the waterproofing layer.

2. Heat Application Method

One effective technique for removing waterproofing from exterior walls is the heat application method. Here’s how you can use heat to remove the waterproofing layer:

  1. Heat gun or industrial blowtorch: Use a heat gun or an industrial blowtorch to apply heat directly to the waterproofing layer.
  2. Temperature control: Adjust the temperature as needed, making sure not to exceed the manufacturer’s recommended guidelines. Be cautious, as applying too much heat can damage the wall’s surface.
  3. Peel off the softened layer: Once the waterproofing layer has softened due to the heat, peel it off using a scraper or putty knife.

3. Chemical Stripper Method

Another effective technique involves using a chemical stripper to remove the waterproofing layer. Follow these steps:

  1. Choose a suitable chemical stripper: Select a chemical stripper that is specifically designed for removing waterproofing products. Consider consulting with a professional or referring to the manufacturer’s instructions for guidance.
  2. Prepare the surface: Clean the surface of the exterior walls thoroughly, ensuring there are no loose debris or dirt.
  3. Apply the chemical stripper: Apply the chemical stripper to a small section of the wall using a paintbrush or roller, following the manufacturer’s instructions.
  4. Allow time for penetration: Allow the chemical stripper to penetrate the waterproofing layer for the recommended amount of time.
  5. Scrape off the softened layer: Using a scraper or putty knife, gently scrape off the softened waterproofing layer. Be careful not to damage the wall’s surface.
  6. Repeat if necessary: If there are remaining traces of waterproofing, repeat the process on the affected areas until all the layers are removed.

4. Pressure Washing Method

In some cases, pressure washing can effectively remove waterproofing from exterior walls. It is essential to follow these guidelines for safe and efficient removal:

  1. Rent or purchase a suitable pressure washer: Ensure that the pressure washer you choose has an adjustable pressure setting, allowing you to control the force applied to the wall.
  2. Prepare the surface: Clean the surface beforehand to remove any loose debris or dirt.
  3. Test the pressure washer: Before applying the pressure washer to the entire wall, conduct a test on a small, inconspicuous area to determine the appropriate pressure setting.
  4. Maintain a safe distance: Stand at a safe distance from the wall to avoid damaging the surface. Keep the nozzle moving in a sweeping motion rather than focusing on one spot for too long.
  5. Gradually remove the waterproofing: Direct the pressure washer towards the waterproofing layer, slowly removing it by continuously moving the nozzle across the wall’s surface.


Q: Can I remove the waterproofing layer manually with a scraper?

A: While it is possible to manually remove the waterproofing layer with a scraper, it can be a time-consuming and labor-intensive process. The use of heat, chemicals, or pressure washing methods can significantly speed up the removal process.

Q: Should I hire a professional for waterproofing removal?

A: If you are unsure about the proper techniques or the complexity of the project, it is recommended to hire a professional. They have the expertise, equipment, and experience to remove the waterproofing layer effectively and safely.


Removing waterproofing from exterior walls can be a challenging task, but by using the right techniques, you can achieve the desired results. Whether you choose the heat application method, chemical stripper method, or pressure washing method, always prioritize safety and follow the manufacturer’s instructions for the best outcome. If you are unsure about the process or have concerns about potential damage, it is advisable to seek the assistance of a professional. With the proper approach, you can remove the waterproofing layer and prepare your exterior walls for any necessary next steps.

Waterproofing Somerset West

Leave a Comment

Your email address will not be published. Required fields are marked *

Open chat
Need help?
Hi there,
Can I offer you a FREE no obligation quote?