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Information Bank

We are happy to help with any questions related to our products. Here you will find information about our educational courses as well as our product information and guide material.

Our information packages can be found from the various categores below. All material is downloadable. We also provide educational courses which cover a variety of subjects, find out more under Courses.

Frequently asked questions

1. What is the difference between dry-pressed and extruded ceramic tiles?

The tiles are manufactured with a different production method. Extruded tiles are formed by an extrusion machine and shaped by means of a mould after which the tiles are then cut into the requested sizes. The production of dry pressed tiles is different as the raw powder is pressed in a mould and then later the surface is treated depending on the requested finish. Dry-pressed ceramic tiles are often more accurate in size.

2. What is the difference between a glazed and unglazed tile?

A glazed tile has a glass wear layer called a glaze fused to its’ surface. The glaze protects the surface from water impregnation and makes the surface easier to clean. A glazed tile is often more slippery and less durable than an unglazed tile and is therefore less suitable for high traffic areas.

3. What is the difference between a polished and unpolished tile?

Polished tiles are tiles that are polished to a glossy finish with a diamond polishing machine.

4. Can a larger tile be used in a smaller space?

If the wall surfaces are clear without protrusions or edges, even small spaces can be tiled with a larger tile. Larger tiles require less seams and give a more spacious impression in a space.

5. Should I select a grout color close to the colour of tile?

In General, you should choose a very neutral grout color, which is the same shade or lighter than the colour of the tile. It is also possible to select a completely contrasting grout color, which draws attention to the pattern and layout of the tile.

6. Is underfloor heating suitable with ceramic tiles?

Underfloor heating is ideal under floor tiling. Ceramic tiles store heat energy and releases it evenly around the room. When installing tiles over underfloor heating, a flexible mortar of category S1 or S2 must be used.

7. Is it possible to install tiles over existing tiles?

It is possible to lay tiles over existing ones. However, it is important to make sure that there is no moisture damage behind the existing tiles and that the tiles are firmly bonded to the substrate. The tiles are cleaned of any dirt, sealers or wax and the surface of the tile is roughened with a sander. A mortar suitable for overlaying tiles must be used for the job.

8. How are ceramic tiles kept clean?

Ceramic tiles are easy to keep clean. It is important to take care of cleaning the tiles with care after laying and grouting the tiles, so that any cement or lime residues are removed from the surface. Follow our cleaning guide for more assistance.

9. How to keep grout clean and stain-free?

The grout is a porous cement-based or epoxy-based material. Epoxy grouts do not need to be protected, as they have a water absorption of 0%. Cement-based grouts have a water-absorption of 4-15%, and can get dirty beyond the surface. Where necessary, it is possible to use a grout sealer to protect them from stains.

10. Which tiles are suitable for outdoor use and which tiles are resistant to frost?

As a rule of thumb, tiles that have a water absorption of 1% or less are frost resistant with the exception of Terracotta and other natural ceramic tiles. If the tiles are installed outside on a pedestrian area, a suitable slip resistance must be ensured. When laying tiles outdoors, all substrates and mortars must be weatherproof in order to avoid frost damage to the tiles.

11. Which tiles are suitable for wet areas?

A suitable slip resistance must be ensured when installing tiles in a wet room. Some stones and decorative tiles are not suitable for wet rooms or other areas, where they would be exposed to water stress.

12. What are tile PEI and Floor Slip Rating?

Slip floor ratings are divided between the industrial and commercial R-class to the wet room A, B or C class. The R-classes are between R9 and R13. Class R9 is a suitable slip resistance for most floor surfaces. TIles with slip resistance R11-R13 can be used as industrial flooring and food service tiling. Most wet rooms require tiles with a B-class slip resistance. PEI is a rating system to measure the hardness of glazed tiles and to determine their suitability in certain areas. 1 is the least durable and tiles with rating 5 are are most suited for areas with heavy traffic. As a general rule, tiles with a PEI rating of under 3 are not suitable as floor tiles. PEI 5 rated tiles can be used as flooring in retail stores and other areas with much pedestrian use.

13. Can i use glass mosaic as flooring?

All glass mosaics are not suitable for floor use. Check with our professional sales people if the product is suitable for your intended space.

14. Are natural stones suitable in wet areas, for example as a shower floor?

All natural stones are not suited for wet rooms. For example sandstones can not be used as flooring in wet areas. Some stones contain iron, which can cause the surface of the stone to form rust when in contact with water. Please check with our salespeople if your product is suited for wet areas.

15. What is hydrophylic-coating?

HT-coating is a ceramic tile surface treatment method, which ensures the surface is hydrophilic and extremely easy to clean and care for. Water is not repelled from the surface, but spreads to form a thin film - dirt is washed down and can be easily removed. Titanium oxide (TiO2), which is fused to the surface of the tile, creates a catalytic reaction that reacts to light, oxygen and humidity. This titanium oxide has a photocatalytic deodorising feature: it is able to break down the organic compounds such as bacteria, fungi, algae, moss and germs to UV-light without any chemical products. In this way Hydrotect-coated tiles are self-cleaning through the synergy of water and light.

16. What is a rectified tile?

Rectified tiles are dry-pressed tiles that have been precisely ground and cut to give them near-perfect straight edges. These rectified edges give the tile a very clean, symmetrical look, and allow for extremely fine grout lines of 3 mm or less. The best result can be achieved with a grout width of 1-2 mm.

17. What is a suitable grout width when tiling?

Grout lines are generally 2-10 mm wide. The width of the grout is dependant on the edge of the tile - rectified tiles allow for a much smaller grout line. Check with our sales people what the suitable grout width is for your product. It is a good idea to lay tiles with a smaller grout, as grout lines are the weakest part of a tiled surface.

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