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Sep 07, 2025Connect With Our Team
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Tiles do not only represent a matter of look, but also the strength, security, and practicality of your space. The tile thickness is one of the most important factors that are not considered carefully during tile selection. Color, texture, and pattern are usually the focus, but thickness is also a significant factor in performance, installation, and durability.
When choosing ceramic wall tiles, porcelain floor tiles, or even 20mm outdoor tiles, getting the thickness right means your surfaces will be strong and beautiful over the years. This guide will help you make an informed choice by breaking down the ideal tile thickness in mm for indoor wall and floor applications, answering common questions, and providing expert tips.
Understanding Tile Thickness
Ceramic tile thickness refers to the measurement from the front surface to the back of the tile. Although it might not seem so, a few millimeters can be the difference between performance and installation.
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Standard wall tile thickness: usually between 6 - 10 mm.
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Standard ceramic floor tile thickness: typically 8 - 12 mm.
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Porcelain tile thickness (20mm): intended to be used outdoors or in heavy traffic.
The thickness of tiles also depends on tile sizes in mm. Bigger tile sizes may need to be thicker so that they do not crack, whereas smaller tiles may be thinner. The materials such as ceramic, porcelain, and natural stone also determine the optimum thickness.
Standard Tile Thickness for Indoor Walls
When it comes to walls, thinner tiles are usually sufficient.
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Wall tile thickness (mm): Typically between 6 and 10 mm.
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Thickness of subway tiles: approximately 8 mm, lightweight and easily assembled vertically.
Thin wall tiles are lighter and minimize structural pressure while simplifying cutting and installation. In humid conditions, such as bathrooms or kitchens, a bit heavier tile can be used to increase strength. However, in many cases, it is not necessary to go further than 10 mm unless you operate with decorative stone or special finishing.
Standard Tile Thickness for Indoor Floors
Floors are in the line of fire, meaning they require tiles capable of supporting foot traffic and furniture.
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Ceramic floor tile thickness: generally 8 - 12 mm.
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Porcelain tile thickness: higher-end because of added density.
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Large floor tiles: 15 - 20 mm tiles may be used in certain areas to ensure maximum stability.
Thicker tiles are advised in high-traffic areas like living rooms or business premises. Although most of the time 20mm porcelain tiles are applied outside, they are occasionally used inside in heavy load areas such as garages. Outdoor tiles of 20mm are designed to be durable and slip-resistant, while indoor ones are created for comfort, aesthetics, and weight-bearing.
How Tile Thickness Affects Performance
Thickness has a direct impact on how your tiles function:
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Durability: Thicker tiles have higher resistance to cracks and chips, particularly when exposed to heavy loads.
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Installation: Thick tiles weigh more and may require stronger adhesive and subfloors.
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Design Flexibility: Thinner tiles are simpler to cut, and adapt to intricate wall patterns.
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Care: Both thick and thin tiles are durable when used appropriately, though thick tiles last longer in high-stress settings.
Balancing ceramic tile thickness with tile size in mm ensures a long-lasting installation.
Common Mistakes to Avoid
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Selecting tiles that are too thin for floors: causes cracks at busy spots.
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Excessive use of thick tiles on walls: adds unnecessary weight and expense.
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Disregarding adhesive thickness: installers should consider both tile and adhesive depth.
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Poor fit on space size: very thick or thin tiles may distort proportions and workability.
Expert Tips for Selecting the Right Tile Thickness
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Walls vs Floors: Go thinner for walls (6–10 mm), thicker for floors (8–12 mm or more).
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Outdoor Use: Always choose 20mm outdoor tiles for patios, driveways, and walkways.
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Lifestyle Considerations: Families, pets, and high-traffic areas need thick floor tiles for durability.
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Consult Experts: A professional installer can recommend the right balance of tile thickness mm and tile size for your space.
Conclusion
Choosing the right tile thickness is essential for long-lasting, beautiful flooring and walls. For walls, thinner tiles (6–10 mm) are sufficient, while floors benefit from thicker options (8–12 mm). Heavy-duty areas may require thick floor tiles or even 20mm porcelain tiles for maximum strength.
By matching thickness to application—walls, floors, or outdoor areas—you’ll achieve both durability and design harmony. When in doubt, consult a tile professional to ensure your choice complements both your style and your space’s needs.
FAQs About Tile Thickness
1. What is the best tile thickness for walls?
For indoor walls, 6 - 10 mm is ideal. Lightweight tiles reduce strain on vertical surfaces, making installation easier.
2. What is the standard ceramic tile thickness in mm?
Standard ceramic tile thickness ranges from 8 - 10 mm for walls and 8 - 12 mm for floors.
3. Are thick tiles better than thin ones?
Not always. While thick tiles offer more durability, thin tiles are easier to handle, cut, and install. The best choice depends on whether they’re for walls, floors, or outdoor use.
4. How thick should bathroom wall tiles be?
Bathroom wall tiles typically measure 6 - 8 mm, balancing lightweight design with water resistance.
5. Do 20mm porcelain tiles work indoors?
Yes, but they’re over-engineered for most indoor spaces. 20mm outdoor tiles are best reserved for patios, driveways, or high-load commercial settings.
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