Best Way to Lay Bathroom Tiles: What is the 3/4/5 Tiling rule?

Laying tiles perfectly is pretty much an easy endeavor if you simply hire a professional tiling service or watch a good tiler do his magic. A good tiler can turn any space into a work of art and bring the best out of the tiles that you have chosen for your rooms.

But what if you want to get more adventurous and tile your room by yourself? DIY tiling can certainly be an interesting accomplishment to embark upon. After all, you get to watch the magic unfold with your own efforts.

However things can go south very quickly and your exciting project can crumble quickly without proper tiling guidance and professional tips.

So, in this blog we will explore the best way to lay bathroom tiles and also discuss the popular 3/4/5 tiling rule.

Peter Yusuf - March 27, 2025

Laying Bathroom Tiles: Tools and Gear You will Need

Buckle up, if you are ready for your diy bathroom tiling project, you will need some tools and gear to execute this process in the smoothest manner where you will be able to pat yourself on the back at the end.

Here’s the list of all the tools and gear that you need to be equipped with to take on your bathroom tiling project.

Make sure that you have all the tools ready to ensure that you have a seamless tiling experience.

1.Measuring Tools:

Measuring tape
Level
Square
Chalk line
Pencil/ Marker

2.Cutting Tools

Tile cutter
Tile saw
Tile nipper
Tile hole saw

3.Tile Installation Accessories

Tile spacers
Tile adhesive
Notched Trowel

4.Grouting Tools

Rubber float
Grouting sponge
Grout
Grout sealer

5.Finishing Tools

Caulk gun
Tile trim
Silicone caulk

6.Safety Gears

Knee pad
Safety glasses
Gloves
Dusk mask

What is the 3/4/5 Tiling rule?

The 3-4-5 tiling rule is pretty handy to get the perfect look out of your room. Tiling bathrooms is no different than tiling any other rooms. However, tiling bathrooms does present certain challenges as you have to leave out holes for your drainage and taps.

The 3-4-5 tiling rule has its roots in the geometric principles and it is a tiling pattern used specifically in the case of rectangular tiling and right-angled triangles.

This technique involves right triangles with sides of length in the ratio 3:4:5 which actually comes from a Pythagorean principle.

For Tiling:

The 3-4-5 triangle is a right triangle where the lengths of the sides follow the Pythagorean theorem: 32 +42=52 or 9+16=25 which is a valid right triangle
These right angled triangles can be used to create lines or patterns, where the right-angle triangles fit together perfectly.

The right angle formation is crucial in laying bathroom wall tiles and bathroom floor tiles as it helps to create the perfect right angle.

How to use the 3-4-5 Tiling Rule for Laying Bathroom Tiles?

Now that you are familiar with the geometry involved behind the famous 3-4-5 tiling rule, it’s time to find out how you can implement this process while laying your bathroom tiles.

If you do this properly, you will end up with a sleek and accurately tiled bathroom floor or a bathroom wall..

Using the 3-4-5 Rule:

Measure and Mark the Surface :

Commence by measuring along one floor or wall and mark a 3-foot (or 3-meter) length. This is the first step of this crucial process.

Measure Perpendicular Next:

Now use the end of that first measurement and mark 4 feet (or meters) perpendicular to the first line.

Diagonal Check:

Next the diagonal between these two points should be exactly 5 feet (or meters) long. If that is the result, great, you have now successfully created a perfect 90-degree angle between the two lines.

This 3-4-5 process helps to assure that your tiles will be laid in a straight pattern and that your bathroom floor or wall will be square at the end of the tile laying process.

The 3-4-5 technique helps to avoid misalignments and ensure square corners. The professional tilers and tiling services also use this technique to get that perfect finish so taking a tip straight out of the professional tiling textbooks will definitely help you achieve that desired look.

In Conclusion

Tiling is an extremely meticulous process that involves caution and precision work. We still recommend that you take help from a professional tiler to get the best and desired results.

However, for smaller tile installations, we suggest that you use the 3-4-5 method to achieve more accuracy.

Lastly, for more professional tiling tips, you can reach out to our experts at Royal Tiles. Also, contact us to buy the best bathroom floor tiles, bathroom wall tiles and shower tiles in Sydney.

Peter Yusuf

Peter Yusuf is a seasoned Sales and Business Development Manager at Royal Tiles in Sydney, Australia, with a proven track record of success in the global architectural and interior design sectors. With over a decade of experience, he possesses a rich understanding of tile selection and design that has helped countless clients transform their spaces. Peter's expertise spans a wide array of materials and styles, positioning him as a trusted authority in the tile industry.

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Best Way to Lay Bathroom Tiles:
What is the 3/4/5 Tiling rule?