removing thinset from concrete floor

Mastering the Art of Removing Thinset From Concrete Floors: 4 Expert Methods

Are you struggling with stubborn thinset residue on your concrete surfaces? Don’t worry, we’ve got you covered! In this article, we will explore 4 best methods for removing thinset from concrete floors. Whether you’re dealing with a small tile installation project or renovating an entire space, these techniques will help you achieve flawlessly clean and smooth concrete surfaces. Get ready to say goodbye to unsightly residue and hello to a pristine finish!

Method 1: Mechanical Removal

Removing thinset using mechanical methods is one of the most popular and efficient options. Here, we will discuss 2 prominent techniques: grinding and scraping.


  1. Start by equipping yourself with a diamond wheel attachment for your angle grinder. This will help you grind down the thinset layer effectively.
  2. Put on safety gear, including goggles, a mask, and ear protection. Safety should always be your top priority.
  3. Set the angle grinder to a low speed initially to avoid damaging the concrete surface. Increase the speed gradually if necessary.
  4. Position the angle grinder slightly, ensuring the diamond wheel comes into contact with the thinset. Gently move the grinder back and forth to grind away the thinset layer.
  • This method is ideal for thick or stubborn thinset layers.
  • It may generate significant dust, so ensure proper ventilation or use a dust extraction system.
  • Be cautious not to apply too much pressure, as it may cause damage to the concrete surface.

Tip: “Grinding is a powerful technique that allows you to efficiently remove thick or adhesive thinset layers without damaging your concrete.”


  1. Begin by using a heavy-duty floor scraper with a razor-sharp blade to remove as much thinset as possible.
  2. Hold the scraper at a low angle and apply firm pressure, ensuring the blade is in contact with the surface. Push forward to scrape off the thinset.
  3. For stubborn areas, try heating the thinset using a heat gun or handheld torch, as it softens the material, making it easier to scrape away.
  • Scraping is a suitable method for thin layers of thinset or hard-to-access areas.
  • While scraping, be cautious not to dig into the concrete surface, as it may cause damage.
  • Ensure you have replacement blades on hand, as they tend to wear down quickly.

Callout: “Scraping is a versatile and effective method, allowing you to remove thinset from both small and large surface areas.”

removing thinset from concrete floor

Method 2: Removing Thinset From Concrete With Chemical

Chemical removal involves using specialized products to break down the mortar and facilitate its removal. Follow these steps to achieve the best results:

  1. Begin by selecting a high-quality thinset remover product. Read and follow the manufacturer’s instructions carefully.
  2. Apply the thinset remover generously on the affected areas, ensuring complete coverage.
  3. Allow the product to penetrate the thinset for the recommended amount of time, typically 15-30 minutes.
  4. After the designated time, use a scraper or a stiff-bristle brush to remove the loosened thinset gently.
  5. Rinse the area thoroughly with water to eliminate any residue.
  • Chemical removal is most effective for small areas or thin layers of thinset.
  • Always wear gloves and a mask when working with chemical thinset removers to protect your skin and respiratory system.
  • Test the product on a small, inconspicuous area of the concrete to ensure compatibility and avoid any potential damage.

Tip: "Chemical removal offers a convenient and hassle-free approach to tackle thinset, especially in smaller applications. Just remember to choose the right product and follow the instructions diligently."

Method 3: How To Grind Down Thinset With Heat

Using heat to remove thinset is a technique that can soften the material, making it more manageable to remove. Follow these steps for effective heat removal:

  1. Begin by equipping yourself with a heat gun or a handheld torch.
  2. Set the heat gun to the lowest temperature initially, gradually increasing it if necessary.
  3. Direct the heat towards the thinset, holding the tool a few inches away from the surface.
  4. Move the heat source back and forth across the thinset, allowing it to heat up and soften for easier removal.
  5. Once the thinset has softened, use a scraper or putty knife to gently lift and scrape it away.
  • Heat removal is particularly effective for thicker or adhesive thinset layers.
  • Take safety precautions while working with heat sources, and ensure the area is well-ventilated.
  • Do not overheat the thinset, as it may cause damage to the concrete surface.

Method 4: Drill thinset off Concrete with Hammer Drill

For more stubborn or widespread thinset removal, a hammer drill is a powerful tool that can efficiently break up the material. Follow these steps for effective hammer drill removal:

1. Gather the necessary tools:

  1. Hammer drill with an SDS-plus chuck
  2. Wide chisel bit (2-inch or wider)

2. Safety glasses and gloves

  • Prepare the area:
  • Clear the area of any debris or obstacles.
  • Open windows or use fans to ventilate the workspace.

3. Attach the chisel bit:

  • Secure the chisel bit firmly into the SDS-plus chuck of the hammer drill.
  • Ensure the chisel bit is facing the direction you intend to chip away the thinset.

4. Begin chipping:

  • Hold the hammer drill firmly with both hands, keeping the chisel bit angled slightly downward.
  • Engage the hammer drill’s hammering mechanism and begin chipping away at the thinset.
  • Work in small sections, gradually removing the thinset layer by layer.

5. Remove loosened thinset:

  • As the thinset breaks up, use a scraper or putty knife to remove the loosened pieces.

6. Continue chipping and scraping:

  • Repeat the chipping and scraping process until the entire thinset layer has been removed.

6. Clean up:

  • Dispose of the removed thinset properly.
  • Vacuum or sweep the area to remove any remaining dust or debris.

What Makes Removing Thinset So Tough? 

Thinset, a cement-based adhesive used to bond tiles to surfaces, is known for its exceptional strength and durability. This same strength makes thinset challenging to remove once it hardens, forming a tenacious bond that resists removal efforts. 

Several factors contribute to thinset’s stubborn nature, including its cement-based composition, water activation, ability to penetrate porous surfaces, and thickness of the layer. Consequently, removing thinset often requires specialized tools and techniques, with the difficulty varying depending on the specific circumstances.


Removing thinset from concrete doesn’t have to be an overwhelming task anymore. By employing the methods discussed above – mechanical removal, chemical removal, and heat removal- you can achieve impeccable results while preserving the integrity of your concrete surfaces. 

Remember to assess the thickness and type of thinset before selecting the appropriate method. So go ahead, equip yourself with the knowledge and tools needed to master the art of removing thinset, and unveil the true potential of your concrete spaces.