How to Close the Gap Between Tub and Floor Tile?

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Water likes to slip into places where it doesn’t belong. And its favorite place to visit is the gap between the tub and floor tile. But this bad habit of water can ultimately ruin your tub for good.

So, it boils down to one question: how to close the gap between tub and floor tile?

The best way to block the gap is by caulking it. Firstly, measure the gap. Then pick out a good caulk. After that, prepare the caulk gun and apply the caulk. Once that’s done, rub your finger over to smooth it out. Lastly, wait for the caulk to dry up.

Sounds confusing? Don’t worry; that’s because we have more details stored up for you. So, without wasting any more time, let’s dive right into them.

Things you’ll need

Let’s start up by gathering all the items needed for this process. This way, you’ll have everything you need within your reach.

Hence, here is a list of all the things that are needed. We hope this helps you out.


Closing the gap between tub and floor tile the correct way

Water is tricky to deal with. You never know what it might end up doing. Sometimes it slithers into places where it is not wanted.

Other times it dries up and may cause an explosion. Yes, I’m talking about water drying up inside a pressure cooker.

However, that’s not the issue that we will be dealing with today. This article will show you how to close up the massive gap between tub and floor tile.

This way, water won’t end up hiding in that gap and destroy your beautiful tub.

Buckle up, people; that’s because we are about to start.

Step 1: Measure the gap between tub and floor tile

Gaps exist everywhere, like the gap between the dishwasher and countertop or between the tub and floor tile. No matter what gap you’re trying to close, the first thing to do is measure the length of the opening.

That’s because the size of the gap will tell you how to proceed next. In this case, the gap will tell you which caulk you need.

So, bring out your measuring tape. It's time to get into action. Now, this part is quite easy. All you have to do is place the measuring tape right next to the gap.

And that’ll tell you the size of the gap. After you find out the gap, store up that information. We’ll need it in the next step. 

Step 2: Pick the right caulk

Like every other thing, the tubs also need maintenance. So, it’s good to know tricks like making a temporary shower or closing up gaps.

Now, as for the gap, you need to select the right caulk. You might start to wonder what is the right caulk in this case, right? Well, it relies on the size of the gap.

If the gap size is about ¼ inch, you can use the regular kind of caulks. However, if the gap is about ⅛ inch, then you need to use sanded caulk.

Moreover, you know, you’re dealing with a washroom, right? Well, that’s not new news, but it does play a role.

You see, that’s because washrooms are a place that thrives on water. So, the caulk you’ll apply will face a battle with water every day.

Now, to make sure the caulk has the upper hand in the battle, you need to give it some strength. And it’s not a person that you can feed to make sure he grows stronger, right?

But you can use a waterproof caulk. This will not get damaged even when it comes to face to face with water. And you won’t have to worry about anything.

Step 3: Assemble the caulk gun

Thirdly, you need to prepare the caulk gun for some action. Well, you might not get your hands on a real gun, but you can definitely have some fun with the caulk gun.

So, are you ready? Then let’s start.

The first task is to cut the tip of the caulk tube’s nozzle. Now, for this, you can use a sharp knife or if you have a caulk gun that has a spout cutter, you can use it to cut the nozzle.

And if you decide to use a knife, make sure you hold the knife at an angle of 45 degrees. You see, this gives the precision that’s needed for a smooth cut.

However, if you have a spout cutter, all you need to do is place the caulk tube’s tip in the cutter. And then squeeze the cutter to open up the nozzle.

Once the tube is cut open, you need to make a hole at the tube’s mouth to ensure that the caulk has a way to get out. Later on, you have to insert the caulk tube in the cradle and your caulk gun will be ready to be used.

Step 4: Apply the caulk on the gap

Once the caulk gun is assembled you can start applying the caulk to the gap. And for this, you have to place the caulk gun at a certain angle. The perfect one is 45-degree. Once you do that you can go ahead and press on the trigger.

After pressing on the trigger you’ll see that the caulk is coming out smoothly. And all you do is move the caulking gap across the gun while the caulk fills up the hole.

Now, if you see that the caulk’s flow slows down, you need to press harder on the trigger. This will push out more caulk.

However, while applying the caulk, you need to apply it as smoothly as possible. Nevertheless, if you fail at this, it won’t be a problem. That’s because we’ll show you how to fix the bumps in the next step.

Step 5: Smooth out the caulk using your finger

Next up, you have to smooth out the caulk. And for this, all you have to do is run your finger across the caulk. This will smoother out the caulk in no time.

Now, your fingers will get a bit dirty, but you can clean your hand later to get rid of the caulk. But look at the bright side. You’ll have a smooth finishing that’ll make your bathroom look amazing.

However, before running the finger, you can dip it in some water. You see, if you use wet fingers, the caulk will even out smoother than ever.

Afterward, use toilet paper to take off the excess caulk. Once that’s done, you’ll have a flawless finishing and a closed-up gap that won’t bother you anymore.

Step 6: Give some time for the caulk to dry

Well, the hard part is over. Now, all that's left is for you to wait a bit. You see, the caulk is wet and it needs time to dry up.

So, have a bit of patience and let the poor guy dry a bit. Now the time can vary between 1 to 10 days. Well, it really depends on the type of caulk you used.

Hence, make sure you check out the instructions for better detail. However, most latex-based caulks tend to dry up quickly.

In fact, it can dry up within 30 minutes. So, you won’t have to wait for too long.

Caution: Do not touch the caulk while it dried up.


Question: How can you close the gap between the wall and floor tiles?
Answer: You can fill the gap between the floor and wall with the right caulk. That’ll close up the gap, and you won’t have to worry about dirt and dust sweeping into the gap every now and then. And as for the process of caulking, it’s the same as the one explained above.

Question: How close can two tiles be?
Answer: The minimum distance between two tiles has to be 2 mm. That’s because the ceramic tiles expand in the heat. And when it does you need to give it enough space to cover up. Otherwise, your tiles will end up cracking and no one likes cracked up tiles.

Question: How close can a tile be to the wall?
Answer: The minimum distance between a tile and the wall should be ¼ inch. However, you can fill it up with other substances. Like a wooden board. Or you can caulk it.

Question: Do you grout between tub and tiles?
Answer: Grouting between tub and tile is a bad idea. That’s because the grouts are not flexible at all. Moreover, they tend to crack at any point. Thus it is best to avoid using this altogether. Instead, you can apply the caulk.

To wrap up

That sums up all the steps to close the gap between tub and floor tile. So, doesn’t that sound like an easy job?

Well, we believe that you can do this. All you have to do is get started with the work. Then you’ll see it’s not a hard task at all.

Best of luck, folks! We hope it turns out great.