When homeowners consider upgrading their kitchen, one common question arises: can a top mount sink be converted into an undermount? The answer is yes — but it requires careful planning, the right materials, and professional installation. This transformation not only modernizes the kitchen appearance but also improves functionality and ease of cleaning.

Understanding the Difference Between Top Mount and Undermount Sinks

A top mount sink, also known as a drop-in sink, has a rim that rests on top of the countertop. It’s easy to install and compatible with most counter materials. In contrast, an undermount sink is installed beneath the counter surface, creating a smooth, continuous line between sink and countertop. This design allows crumbs and water to be wiped directly into the sink without obstruction, giving the kitchen a sleek and seamless look.

Converting from one style to another often depends on the countertop’s material and thickness. For instance, laminate counters are not ideal for undermount installation, while granite, quartz, and solid surfaces handle the change perfectly.

Steps to Change a Top Mount Sink to Undermount

1. Assess Countertop Compatibility

Before conversion, the countertop must be checked for structural strength and waterproof integrity. Materials like natural stone, solid surface, and concrete can support undermount installation due to their density. However, if the existing countertop is laminate or tile, reinforcement or replacement may be necessary.

2. Remove the Existing Sink

Disconnect the plumbing lines, detach clips or adhesive, and gently lift the sink from the countertop. Proper removal prevents damage to surrounding surfaces and ensures a clean foundation for the new setup.

3. Prepare the Cutout

The original cutout may need adjustment to fit the new undermount sink. Edges must be smooth, level, and polished to ensure a watertight seal. This process often requires professional stone cutting tools.

4. Install Support Brackets

Since undermount sinks hang below the counter, they rely on mounting brackets or a rail system for stability. Metal support frames or composite clips are installed under the counter to carry the sink’s weight evenly.

5. Apply Adhesive and Sealant

A bead of silicone or epoxy sealant is applied between the sink rim and the countertop underside. This prevents leaks and provides additional bonding strength. Ensure even distribution for a clean and durable seal.

6. Connect Plumbing and Test

Once the sink is securely mounted and dried, reconnect water lines, drains, and garbage disposal units. Fill the sink to test for any leaks or alignment issues before finalizing the setup.

Advantages of Converting to an Undermount Sink

• Enhanced Aesthetics: The seamless transition from countertop to sink offers a minimalist and elegant look that elevates the kitchen’s overall appeal.

• Improved Cleaning: With no raised edge, wiping debris directly into the sink becomes effortless, helping maintain better hygiene.

• More Counter Space: Without a bulky rim, you gain a few extra inches of usable workspace around the sink area.

• Better Integration with Modern Countertops: Undermount sinks complement granite, marble, and quartz surfaces, highlighting the material’s beauty.

Potential Challenges to Consider

• Countertop Damage Risk: Improper removal of a drop-in sink can crack or chip existing stone surfaces.

• Structural Support Needs: Heavy sinks, such as those made of stainless steel or composite granite, require additional reinforcement.

• Professional Installation Costs: While DIY conversions exist, hiring experts ensures precision, waterproof sealing, and long-term durability.

Choosing a Reliable Undermount Sink

When upgrading, selecting a high-quality sink determines the longevity and functionality of your new setup. Premium stainless steel, granite composite, or solid surface models offer durability and corrosion resistance.

LANSIDA specializes in Kitchen Sinks crafted with precision manufacturing and advanced finishing technology. Their undermount sink collections feature noise-reducing pads, anti-condensation coatings, and customized dimensions to match various countertop designs. For remodelers seeking performance and aesthetics, LANSIDA sinks ensure seamless integration and lasting reliability.

Final Thoughts

Yes, you can change a top mount sink to an undermount one, provided the countertop material allows it and the installation is performed correctly. The process transforms not only the sink style but also the overall kitchen experience. Partnering with trusted manufacturers like LANSIDA and hiring professional installers ensures that the upgrade delivers both beauty and practicality.