How to Install a Bathroom Vanity Top?

The bustles to upgrade your bathroom vanity top  can be calculative and thought-provoking. To realize the style that fits in, you might have to eye a specific design with the functionality you need during the installation or remodeling. More often than not, many will grapple with this process.

Bathroom vanity top installations commonly involve the vessel or the cabinet style, however, this article focuses on the latter.

We take a look at the simple but straightforward steps that are cost-effective to save your time. You might as well have to count on a set of hands for a quick and effortless experience.

Nonetheless, take time and follow the steps carefully to ensure the setup is smooth.

Before Installation Thinks You Should Know


  • Have your bathroom surfaces ready. It could be the material that interests you most in your applications. It includes the ceramic, stones like slate, granite, and solid surfaces among many others. 
  • When unpacking your bathroom vanity top, ensure everything in the package is handled cautiously to avoid breakages or damaging the vanity top finish. Your vanity kit often includes separately the base cabinet, countertop, sink plus other necessities.
  • Position your sink or counter top on a flat cushioned floor for physical protection. 
  • Seek a second hand beforehand to help place the vanity top on the cabinet and other basic assistance when due. It is to avoid being overwhelmed by the weight which might result to fall-offs and breakages. 

Tools and Materials Required

  • A cordless screw drill for unrestricted movement, otherwise a corded can be handy
  • Screwdriver bits and wallboard screws 
  • A profile gauge and wood adhesive shims (if available or obligatory). 
  • A pencil or marker and Tape measure 
  • A caulk gun, silicone sealant and electronic stud finder 
  • A 25-inch to 50-inch torpedo level
  • A jigsaw



Step 1: Turning off the water the hot and cold

  • Make sure before you kick off with the process all the water is turned off on the pipes and the wrenches. You can position a bucket below the pipes to eliminate instances of any water getting spilled all over the floor. Also, clean dry any water that might be on the old vanity top. 
  • Consider shutting off the valve underneath the sink if necessary. However, if possible, shutting off the entire home water supply might be considered depending on the water connection system. 

Step 2: Installation Prep

  • If you are doing a replacement, consider removing carefully the old vanity top at this stage. It is especially the case when the bathroom remodeling is to be carried out.
  • You might have to use a lot of force to remove the old vanity top than you would with the new to be installed. If you want, you can preserve the old vanity for future reuse or reinstallation needs. 
  • Once the old bathroom vanity is done away with, inspect carefully the walls and the parquet that might be attached. Just in case there are parts of the wall that require patching or painting, fix them up.

Step 3: Taking Measurements

Make sure you have taken measurements of the vanity cabinet level, otherwise for the rough parts; use your adhesive shim to level them out.

  • Take your tape and measure the distance from the top of the vanity base cabinet located on the back of the wall, for side wall for corner installations. 
  • You can utilize the measurements guide provided in the backup manual. Nonetheless, if this doesn’t conform to your specifications, measuring the floor distance to the top of the base cabinet will be appropriate. 
  • The vanity set up should have the equivalent projection of your measurements on each side attached to the wall and towards the floor. A little bit of the testing with your vanity top will help to check on countertop fitting. 
  • Use your level to check that the vanity is level up from front to the back side and from one side to another. 
  • To secure your cabinet to the back of the wall, drive your screws rough the mounting strip in the back of the cabinet into your earlier located wall studs.

Step 4: Organize the Vanity top and set up location

  • Check whether your vanity top comes with a back to cut out any space for pipe fitting. Confirm if you have to shimmy the legs for an accurate and stress-free sitting. 
  • Locate your installation point and use a measuring tape and marker (pencil) to smudge the exact location points. 

Step 5: The cleanup and checking the fit 

  • Use a damp clothing material to clean the cabinet frame thoroughly including the gaps to be filled.
  • While the counter top face is facing downwards, use the soft clean fabric to ​clean the bottom.
  • Inspect that the fitting of the side splash, countertop and backlash is flawless and smooth. 

Bathroom Vanity Top

Step 6: Positioning the counter

  • Place your sink bowl with the pre-cut holes on the base of the countertop and trace the outline of the sink using your marker. You can take away the sink and place it in a distant safe location. 
  • Apply your adhesive continuously on the adhesive passage on your sink bowl before leaving it facing downwards for an overnight dry. 

Step 7: The sealing process

  • You have made tremendous progress so far but the bowl and vanity top needs careful installation. 
  • Inspect your sink bowl underneath is clean before applying your silicon sealant carefully. 
  • Thereafter, install your faucet and the drain set up on the sink top cautiously to ensure it perfectly matches or is aligned with the top sitting. 
  • If there is any kind of dirt that is attached on your vanity cabinet, use a damp cloth to clean it up. 

Usually, your faucet and vanity top will come with installation instructions to help see you through the step by step set up. Make sure you follow it through.

Step 8: Vanity top Installation 

  • Apply a silicon drop on the boundaries of your vanity cabinet carefully including either border walls. 
  • Install your bathroom vanity top onto the cabinet on top of the silicon drops carefully and confirm the setting is matched correctly. The vanity top should be of the right shape, size, and design that fit in seamlessly. 
  • Check that your bathroom vanity top is attached to the wall studs. The appropriate screw length of ideal for your vanity should be of help. Be careful not to smash your pipes with the screws. In most cases, screws of 1-inch or less are the most suitable. 
  • After the vanity top is positioned stably, clean the bottom of your backsplash and the top part of the vanity top to remove any dust accumulated during this installation. 
  • You can now apply the adhesive on the unpolished side of the backlash (if it is to be set up) before running a bead of silicone caulk on the vanity top for subsequent backsplash set up. 
  • It can also be done on all the joints. Make sure you caulk where the setup wall meets the backsplash smoothly. You can use your finger to even out the caulking finish. 
  • Install the back and side splashes and examine whether the backsplash is accurately fitted. Place the rudimentary edges of the backsplash on the caulk. 
  • Press it against the wall at the same downwards to your already installed vanity top. You can spread out your adhesive evenly and uniformly at this point in time as well.
  • Check whether the bottom of the backsplash is even with the top part of your bathroom vanity top.
  • You can wipe away any glut caulk that stuck on the edges using a clean sponge or damp material fabric. 


Attach back the draining pipe and the rest of the assembly including the water supply lines to your faucet. The flexible supply tubes should run from the shutoff valves through to the tailpieces of your faucet. 

The plumbing reconnection can be a little challenging especially if you are doing this for the first time.

If not sure about this final procedure to ensure everything goes flawless, you can call in an expert plumber to help with the reconnection.

Irrespective of who does the reconnection; inspect the whole set up to confirm that no water is running to or from the sink [no leaks].

Once your bathroom vanity top is completely installed, it is time to enjoy your newly renovated bathroom. If you can manage to do all this by yourself, future reinstallations should be a walk in the park.

Tips to keep in Mind

  • Tip 1: Your bathroom vanity top should be stably anchored to the wall studs. It is why you should be keen on the position of the studs on the wall, particularly behind the vanity cabinet.
  • Tip 2: You can use an electronic stud finder to help you identify at least a single wall stud that might be located behind the vanity installation site. You can use the pencil to make the located stud before proceeding with the procedure to identify the second.
  • Tip 3: If your sink is usually separate from your countertop, it is imperative to attach it to the countertop before you proceed with the installation of your vanity top.

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