A Step-By-Step Guide: How Are Undermount Sinks Installed for a Seamless Kitchen Upgrade?

A well-designed kitchen is the heart of any home, and choosing the right sink can make a world of difference. When it comes to kitchen upgrades, undermount sinks have become a popular choice for homeowners seeking a seamless and elegant look. Unlike traditional top-mounted sinks, undermount sinks are installed beneath the countertop, creating a sleek and smooth surface. In this comprehensive guide, we will walk you through the process of installing undermount sinks, ensuring a seamless integration into your kitchen space. 

In this blog post, we will take you through a step-by-step journey, unraveling the art and science behind installing undermount sinks. From understanding the benefits of this sleek design to mastering the installation process, we’ve got you covered. Let’s delve into the step-by-step process of achieving a seamless kitchen upgrade with undermount sinks.

Understanding Undermount Sinks

Undermount sinks are fixtures installed beneath the countertop, offering a variety of materials and styles to choose from. They provide a range of advantages, including a streamlined appearance, easy countertop cleanup, and enhanced functionality. Materials such as stainless steel, granite, and porcelain are popular choices for undermount sinks, each offering unique benefits to homeowners.

Preparing for Undermount Sink Installation

Before diving into the installation process, it’s crucial to assess your kitchen layout and choose an appropriately sized sink. Selecting the right material and style that complements your countertops is essential. From providing adequate support to choosing the right adhesive, every step in the undermount kitchen sink installation process plays a crucial role in achieving a secure and visually pleasing outcome. Additionally, gather the necessary tools and equipment, ensuring you have everything needed for a smooth installation experience.

Steps for Undermount Sink Installation

Undermount kitchen sink installation involves various careful considerations. Maximize your space and style by choosing the perfect undermount sink for your kitchen. 

Here is a detailed step-by-step guide for installing undermount sink. Let’s delve into it

Step 1: Marking the Sink Position 

Before beginning the installation of the undermount sink, measure and mark the precise position of the undermount sink on the countertop. Using a measuring tape and a pencil, mark the dimensions carefully. Take into account the size of the sink and its shape. Precision at this stage is critical for a seamless fit and a polished final look.  

Step 2: Creating the Sink Cutout 

Once you have marked the sink’s position, it’s time to create the sink cutout on the countertop. Utilize specialized tools such as a jigsaw or a router to carefully cut along the marked lines. Take your time and follow the lines precisely to avoid any errors.  

Step 3: Sealing and Attaching the Sink 

After the cutout has been made, it’s time to seal and attach the undermount sink. Apply a high-quality adhesive or sealant to the rim and install an undermount sink without clip. Press down gently to secure the sink in place. Wipe off any excess adhesive that might have squeezed out during the process.

Step 4: Reinforcing and Securing the Sink 

To reinforce the sink and ensure its stability, add support brackets underneath. Secure the brackets to the underside of the countertop, ensuring they are firmly in place.  

Step 5: Connecting Plumbing Fixtures 

With the sink securely in place, it’s time to connect the plumbing fixtures. Install the faucet, drain, and garbage disposal according to the manufacturer’s instructions. Use appropriate plumbing tools and materials to create tight and secure connections. 

Planning an undermount kitchen sink installation? At Badger Granite, we specialize in undermount sink installations, providing expertise and precision to transform your kitchen. Explore our collection by visiting our countertops store in Oak Creek, WI, and get expert services for your kitchen or bath remodel. 

Tips for Maintenance and Care

Proper maintenance is vital to preserving the beauty and functionality of your undermount sink.  

  • Regular Cleaning: Clean your undermount sink regularly with mild, non-abrasive cleaners to maintain its shine and prevent buildup.
  • Avoid Harsh Chemicals: Opt for gentle, eco-friendly cleaning solutions.
  • Protect from Impact: Be cautious with heavy pots, pans, or sharp objects. 
  • Prevent Thermal Shock: Avoid sudden temperature changes
  • Regular Plumbing Checks: Check for any plumbing leaks under the sink. Address leaks promptly to prevent water damage to the surrounding area.
  • Avoid Standing Water: To prevent mineral buildup and stains, avoid letting water stand in the sink for extended periods. 
  • Use Sink Grids: Consider using sink grids or mats at the bottom of the sink to protect it from scratches and reduce noise from dishes and utensils.
  • Professional Maintenance: Schedule professional maintenance checks periodically to ensure the sink and its connections are in optimal condition.

Common Mistakes When Installing an Undermount Sink: Avoiding Installation Pitfalls

While undermount sinks offer a sleek and modern look to kitchens, installing them requires attention to detail to avoid common mistakes. One prevalent error is a lack of proper support during installation. Failing to adequately support the sink can lead to structural issues and potential damage over time. Another mistake is using the wrong adhesive or sealant. Choosing the right products for undermount kitchen sink installation ensures a secure and watertight installation.


Installing undermount sinks is a transformative step in upgrading your kitchen. Their seamless integration enhances the overall aesthetic and functionality of your space. At Badger Granite, we specialize in undermount sink installations, ensuring precision and elegance in every project. Consider undermount sinks for your kitchen upgrade, and experience the difference they can make in your daily culinary activities.

Ready to transform your kitchen with a seamless undermount sink installation? Explore Badger Granite’s range of undermount sinks and countertop options. Contact us today to schedule a consultation and discuss your kitchen upgrade needs.

Frequently Asked Questions

How are undermount sinks installed?

Undermount sinks are installed beneath the countertop, creating a seamless look in kitchens and bathrooms. First, the countertop is measured and cut to accommodate the sink. The sink is then placed into the prepared hole from below, ensuring a precise fit. Proper sealing and connection of plumbing fixtures complete the installation, resulting in a sleek and functional sink that enhances the overall design of the space.

Do you install an undermount sink before the countertop?

Yes, it is generally recommended to install the undermount sink before the countertop. This approach allows for a more precise fit and seamless integration between the sink and the countertop.