How to Install Drop in Sink on Granite Countertop – A DIY Guide


If you want to install a drop-in sink on the granite countertop, you can do it yourself. You might think it is challenging to install a drop-in sink on a granite countertop. But it isn’t as difficult as it might seem. Granite is a very durable material, particularly if it’s also sealed during the fabrication process. A variety of factors must be taken into consideration when working with granite countertops. The heavy stone is more difficult to cut for non-professional, unlike composite materials, artificial materials, or even cement.

If the granite on your counter is darker than the rest, you should avoid sealants and adhesives that are light-colored whenever you can. If they have to be used, ensure that they are cleaned off promptly so that the stone is not stained. The project involves fitting sinks into the existing granite countertop, which was already cut to accept the sink. In this case, the need for a professional’s help is generally not necessary.

The most important thing to keep in mind for any DIY project is to make the job as straightforward as possible while ensuring top-quality and professional outcomes. This case involves looking for a “drop-in” style sink at the local home improvement store. Sinks that install beneath the sink are also available. However, they take longer, require lengthier (usually professionally) installation, and are difficult for homeowners to install. This guide will help you establish a drop-in sink on a granite countertop with minimal effort.

What is a drop-in kitchen sink

Drop-in sinks are basin that drop into a cut-out hole within the counter. Also called a top-mount, over-mount, or self-rimming basin, the most popular model features a rim placed over the counter to support the sink’s weight. It can fit any kitchen vanity, bathroom counter, or bar that’s structurally strong enough to keep the sink’s weight and can weigh a lot in the case of substantial material like cast iron or porcelain. Drop-in sinks were once the only option, and they’re still more popular than their more fashionable counterparts, such as the farmhouse, undercount, and integrated sink — for two reasons. It’s the least expensive option, and it can use with any countertop.

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How to Install Drop in Sink on Granite Countertop

Types of drop-in kitchen sink

Solid-surface material: It compose of various polyester or acrylic resins. It can make in a range of styles and colors, usually designed to mimic natural stone. Sinks with solid surfaces typically come in white, but other colors are available. The color is uniform across the inside of the sink and isn’t prone to chipping off. Sinks with a solid surface are usually used with countertops, but standalone drop-in sinks offer.

The fireclay: This is a material that has traditionally used to make farmhouse sinks. Fireclay is a highly sturdy, smooth, and quite heavy material similar to porcelain.

Composite: Sinks made of the composite are made of acrylic resins that are mixed with pieces of genuine stone, like granite or quartz, making them highly robust. They’re usually grey or black, but an innovative product combines concrete and jute to create a white, smooth material like porcelain.

Stone: In case you’re in a financial pinch, then you can buy an actual sink that is drop-in for luxurious bathrooms that are made from solid granite, quartz, or marble.

Copper: Copper can’t be thinner than stainless steel. Even though it is typically employed for undercount and farmhouse sinks, it’s also an excellent option to use as a drop-in in your stylish kitchen, bar, or bathroom.

Steel stainless: It is commonly found in bars and kitchens. However, you may also see them in bathrooms.

Enameled or porcelain-coated cast iron: This renowned for its strength and ease of cleaning compared to sink materials. Enameled cast iron is available in white and many different shades.

How to Install Drop in Sink on Granite Countertop

How to install a drop-in sink on granite countertop

Granite composite sinks are excellent accessories to a variety of kitchen designs. Their elegant appearance and significant edge make drop-in installations look more modern and unique than drop-in sinks made from cast iron or stainless steel. Granite composite sinks install like other drop-in sinks. They fit with clips and caulk that hold the sink on the countertop. The sinks can place on any counter material. If you’re installing it on the Formica or laminate counter, you might need to cut the opening for the sink by yourself. The manufacturer misses granite countertops, quartz counters, and solid-surface.

Tools you must need

  • Screwdriver
  • Silicone gel or sealant
  • Drilling machines
  • drop-in Sink
  • Drop-in sink clips to granite

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The next step is to move through to a highly crucial stage. It is, in fact, the measurement that makes the project successful. Even when one of the measurements fails, you’ll not get the results you want. Therefore, it is helpful to be extra cautious when you are making this decision. Begin measuring from the faucet opening on the granite countertop of your kitchen. The total measurement of the sink is 33 inches x 22 inches. Make sure to measure only around the rims of the sinkhole. Please take note of the measurements and bring them to the local shop to purchase the sink.


Next, when making or replacing the sink on your granite countertop, you should look at the design of the drop-in sink. There are various drop-in sinks on the market, based on the degree of the “reveal” of the sink. You can pick the color scheme of your kitchen to suit your preferences and desires. To make things clear, these are the most frequently use classifications for the various reveal sinks.

  • Positive Reveal (A small portion that is the sink can be seen to be above the counter
  • Zero Reveal (The edge of the countertop is aligned with the edge of the sink)
  • A Negative Reveal (The sink is wholly encased into the walls of the sink as well as the countertop)

You can choose based on your preferences. However, most homeowners opt for the show the style. This is because it gives an elegant look to your kitchen. Additionally, it’s simpler to wash and clean the counter. Since dirt and grease can get in the corners and nooks, it is essential to choose a durable item to make it easy for you.


Set the sink in alignment according to whether you’ve selected to install the negative reveal with zero, positive or negative reveal. Installing under-mount sinks is not an easy task, provided you have the correct measurements. Utilize those measurements and note the locations at which you will need to drill holes. It would be helpful to be precise, or else the countertop topped with your kitchen sink may not turn out the way you want it to. Then, take the sink off to drill holes using the drilling machine in the exact spot you have marked the holes. Finally, wash the ridge with a cleansing agent and then leave it for a few hours until it has dried.


The next step is setting up an under-mount basin in its location; however, it requires sealing glue or silicone glue to keep it in place. Then, you will apply the adhesive agent (silicon glue or another sealant) cautiously around the edges. Make sure you use enough so that it’s enough to support the sink. Be aware that you need to apply transparent or clear waterproofing to make your counters have a clean appearance with sinks.


Then, you’ll utilize the wingnuts to insert inside the holes you’ve drilled. Be sure to secure the screws correctly to hold the sink in the right place. When you’ve got to this point, you will need to wait for a couple of days before you can finally put your sink drop-in on the countertop made of granite.


The next step is to be attentive to the directions of the maker of your sink. Make sure to keep the manual in your hand and then follow the steps below:

  • Install your drop-in sink style by using the plumbing fixture beneath the counter. It usually hidden beneath the cabinet.
  • Make sure that you apply to caulk to create a waterproof sealing. The caulking will stop leaks from happening shortly.

Then, you must ensure that there’s no air space between the areas between the edges of the sink and the counter. In this case, it is essential to press the sink from the top side to ensure that it seat securely. The edges should clean by using a dry cloth to eliminate any extra pieces of caulking and sealant between the surfaces during the final step.

How to install drop in sink on granite countertop: Advantages

They are versatile

One of the significant advantages of drop-in sinks is the fact that they can use for a variety of purposes. Not only do they come in a variety of kinds of substances, but they’re also customizable. Drop-in sinks can find in granite, porcelain stainless steel, and many more. They could be either single, double, or even triple basins. Based on the style of your sink, the faucets may install directly onto the countertop or be constructed with holes that accommodate different types of fixtures and faucets.

Drop-In sinks are easy to install

Since drop-in sinks insert into countertops and then rest on top, They are simple to set up. In addition, the installation process tends to be quicker than other sinks. Because the edges of the sink rest on the countertop and they have clamps beneath an under-counter sink, it does not typically require support under it.

They tend to be cost-effective

Since drop-in sinks are among the most common use kinds of sinks, they are affordable. The sink itself is likely to cost less, and installation is usually less expensive also less expensive. It’s also easy to clean them and replace the caulk when needed to maintain them.

Find more: How to prevent water spots on stainless steel sink

How to maintain drop-in sink

Be sure that the waterproofing is in place for longer. One way to prepare for that is to choose the highest sealant that fills gaps between the edges of your sink and the countertop. To ensure that your sink can last for long, you will need to be mindful that you fill the holes every 4 or 5 years. The last thing to do is it is essential to keep the area in order. If you have dirt accumulating around the sink’s edge, the sealant may become fragile and scratch away. Therefore, it is crucial to maintain general cleanliness and hygiene.

Learn more: How to clean a composite granite sink Franke


To wrap up this discussion, now you know how to install drop in sink on a granite countertop and you can complete the task yourself. Drop-in sinks work with any countertop. If you have a granite or marble countertop, you will be able to take advantage of the advantages of having a drop-in sink. When you next require changing or installing the sink under the counter, getting a plumber on the phone or technician is not necessary. Instead, you can take a few easy steps, and you’ll be able to complete the task yourself. However, it would help if you were extremely precise with the measurements and sealing surfaces correctly. If not, it could create problems in the future.

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