Edge Profiles
Pressed Edge Tiles, also known as non-rectified tiles, and Rectified Tiles are two types of ceramic tiles with distinct edge treatments and characteristics. Here’s a comparison between them:
Pressed Edge Tiles (Non-Rectified)
- Manufacturing Process: Created through a pressing process that shapes the edges during production.
- Edge Profile: Can have various profiles, such as bevelled or rounded edges, depending on the design.
- Edge Finish: May not be perfectly straight or uniform, resulting in slight variations.
- Size Tolerance: Typically has a larger size tolerance compared to rectified tiles.
- Installation: Requires wider grout joints due to less precise edge alignment.
- Applications: Suitable for residential and commercial applications where slight edge variations are acceptable.
Rectified Tiles
- Manufacturing Process: Edges are mechanically rectified or shaved after firing to ensure perfectly straight and precise edges.
- Edge Profile: Features uniform and square edges that are accurate to the tile’s dimensions.
- Edge Finish: Achieves a clean and sharp edge, resulting in a more uniform appearance.
- Size Tolerance: Has minimal size tolerance, with tightly controlled edges and dimensions.
- Installation: Allows for narrower grout joints due to precise edge alignment, creating a more seamless look.
- Applications: Ideal for modern, high-end installations where precision and a sleek, clean look are desired, including commercial spaces and high-traffic areas.
Tile Sizing: Nominal vs. Work Size
When it comes to tile sizing, understanding the difference between nominal size and work size is essential. Due to the firing process in a kiln, ceramic tiles naturally undergo shrinkage, leading to slight variations in their final dimensions. This variation depends on the tile type and production batch.
- Nominal Size refers to the approximate or advertised size of a tile, often rounded for convenience.
- Work Size (or actual size) represents the precise dimensions of the tile after firing, considering the expected shrinkage.
Typical nominal tile sizes include 300x300mm, 300x600mm, 400x400mm, 500x500mm, 600x600mm, 800x800mm, and more—offering versatile options to suit a wide range of layouts, styles, and space requirements.
Keep in mind that these nominal sizes can differ slightly from the actual tile dimensions. This matters during installation, as grout spacing and alignment may need to be adjusted based on the actual work size. To achieve a smooth, professional finish, it’s always best to refer to the manufacturer’s specifications when planning your project.
Key Ceramic Tile Characteristics
Choosing the right ceramic tile goes beyond just looks—it’s about finding the perfect balance between beauty, durability, and performance. Here’s a quick guide to key features that ensure your tiles stand the test of time.
Water Absorption
Water absorption measures the amount of moisture a tile can absorb, which directly impacts its durability and performance.
The lower the water absorption, the stronger the tile! High-temperature firing makes tiles denser and less porous, boosting durability and resistance to moisture. Ideal for bathrooms, kitchens, and outdoor areas.
Strength & Durability
Breaking strength indicates the amount of force a tile can endure before fracturing. Measured using the Modulus of Rupture (MOR), it reflects the tile’s structural integrity and density.
A higher MOR value signifies a more compact and durable tile—ideal for high-traffic areas and spaces subjected to heavy loads, such as commercial floors or public walkways. This property is essential when selecting tiles for demanding environments where performance and safety are critical.
Slip Resistance
Safety first! Smooth and glossy tiles may look great, but for wet or high-traffic areas, slip-resistant tiles offer better grip. Tests like the Wet Pendulum Test, Ramp Test, and Coefficient of Friction (COF) help determine how safe a tile is underfoot.
At Kimgres, we use the Wet Pendulum Test (AS 4586 / BS 7976) to measure slip resistance and ensure our tiles meet international safety standards.
Pendulum Test Values (PTV):
- P0: Minimal grip – not for wet areas
- P1–P2: Low–moderate grip – dry indoor use
- P3–P4: Good grip – bathrooms, kitchens, retail, outdoor
- P5: Maximum grip – ramps, pools, industrial, high-traffic zones
Scratch & Wear Resistance
Porcelain tiles are highly durable and offer exceptional wear resistance, making them a top choice for high-traffic areas such as hallways, kitchens, and commercial environments.
Their durability is measured by the PEI (Porcelain Enamel Institute) rating, which indicates a tile’s resistance to surface abrasion—the higher the PEI class, the greater the tile’s ability to withstand wear over time.
Tiles with matt or textured finishes generally perform better in terms of abrasion resistance than high-gloss finishes.
Stain & Chemical Resistance
No one wants tiles that stain easily! Glazed ceramic tiles resist stains thanks to their protective coating, while porcelain tiles are naturally stain-resistant due to their dense, low-porosity structure—making them easy to clean and maintain.
Size & Shape Variations
During the kiln firing process, tiles naturally shrink slightly, which can lead to small variations in size. This is completely normal and varies by tile type and production batch.
Shade & Tonal Variation
Every tile has a unique story! Subtle variations in colour and shading occur due to natural raw materials and high-temperature firing. This adds depth and character, making each tile installation one-of-a-kind.
By understanding these key characteristics, you can confidently choose tiles that not only enhance your space but also provide long-lasting performance. Whether it’s a cozy home, a high-traffic commercial space, or a stylish outdoor area—there’s a perfect tile for every project!
What is Tile Shade Variation?
Tile shade variation means that tiles may differ slightly in colour, tone, or texture—even within the same box. This is a natural part of how tiles are made and often done on purpose to mimic materials like stone or wood.
Why it Matters:
Before installation, view a few tiles from about 1 meter away. This helps you see how they’ll look together and ensures you’re happy with the overall effect.
Shade Variation Ratings:
V1 Uniform Appearance
Tiles look the same with minimal shade or texture differences. Ideal for a clean, consistent finish across your space.
V2 Slight Variation
Tiles show mild differences in texture or pattern within similar tones, offering a consistent yet subtly varied look. Ideal when a bit of natural variation is desired.
V3 Moderate Variation
Tiles feature noticeable differences in colour and texture. While they share similar elements, variations between tiles are more pronounced, creating a dynamic and varied look.
V4 Substantial Variation
Tiles show strong differences in color and texture, with each piece appearing unique. Ideal for bold, distinctive designs where variation is a key feature.