Porcelain Tile Mortar

Tile mortar used to bond tiles to wall. There are two main options as mortar, cement mortar and tile adhesive mortar. Cement material is not glue, dissolving cement with water become fluid state. It poured in between other materials pores and when it dries it becomes rigid and bonding different materials. Porcelain doesn’t have pores, means cement will not bond with it. Unlike ceramic where cement mortar poured into ceramics, it bonding it to wall. As well as, the wall need to be rough to increase bonding mortar to wall. Tile Adhesive is white cement, with materials like glue and other admixture to increase setting time. Since tile adhesive has glue, it’s better than cement mortar for porcelain.

Cement mortar make either from white or Portland cement. Portland cement has dark gray color, it gives the porcelain tiles darker tone color. Therefore white cement is better especially for white and light colors tiles. Mixing cement mortar at site, where each 50KG cement bag need 12 Sand buckets and 0.5 bucket of lime.  Lime gives the mortar elasticity to enhance workability, in high humidity areas we prefer to use hydrated lime S. Sometimes, craftsmen add shampoo to cement mortar which I reject because it weakens the mixture. Notice that cement has initial setting time, and mortar has to used within half an hour. When installing porcelain with cement mortar make a mixture of water and cement only, and pour it between tile and cement mortar.

installing large size tile by cement mortar
installing large size tile by cement mortar, 2019

Mortar adhesive is available in different types, ISO13007 has classified the tile adhesive in codes. The following table will describe the main letter used to write the code, and what each means.

ISO13007 table

To convert the above table to function
C1E : Internal use for ceramic flooring, small tiles
C1TE : Internal use for ceramic walls, small tiles 
C2E : Internal use for porcelain or large scale tiles flooring
C2TE : Internal use for porcelain or large scale tiles walls
C2TES1: External use and swimming pools.
C2TES2 : External use building elevations.

What is Salted Water Effect on Tile Mortar ?

Using salted water is forbidden in construction. Salted water reduce mortar life, the appearance of efflorescence and then tile will loose and fall. Always use a drinking water to protect the beauty of tile work and to increase it life. Since porcelain and ceramic tiles’ laid on  tile adhesive or cement mortar . Both has cement that contain calcium hydroxide which is formed during the cement hydration. When rain water pass through tiles grout will dissolve calcium hydroxide then tile will lose from mortar. Avoiding this use salt water resistant sealer admixture to mortar for avoiding this problem even with drinking water.

This information in enough to understand tiles mortar. Notice that low quality tiles mortar will ruin the tiles, take the right decision and feel free to ask any questions. 

Porcelain Tiles Size & Space Scale

As an architect, who’s always looking for new materials in the market. recently I noticed that traders and tiles showroom compete to provide a larger scale tiles. Before 2017 the larger common tiles size was 60*60 cm, then I begin to find 120*60 cm by 2017, then it reached 100*100 cm by 2018. Since they could market and sell these sizes, the market now in 2019 is full of large scale tiles even on sizes of 70*305 cm and 150*320 cm. Some products with high glossy, Matt and others with rough surfaces. 

Porcelain Texture

Personally, I love large scale tiles, however others always think that tiles size is related to space scale. The grout between tiles isn’t the thing in my view point. I keep my eyes on the texture, the veins size. This beside the tiles’ arrangement, the grout size and color. I like 120*60 porcelain tiles which have stone like with rough texture, or a Matt surface with veins, This tiles size show the texture clearly and show the beauty of continuous veins.

Installing a large scale tiles

On the other hand, Installing a large size tiles require a skilled craftsman, where it could install regularly using cement mortar indoors. But as porcelain is solid has fewer pores that doesn’t allow cement to bond with tiles. The large size of tile means more weight, which requires installing use tile adhesive. The adhesive has glues which increase the bond between the wall and tiles. Since tile adhesive is the best choice to install large size tiles, there is an important requirement to prepare the surface. The surface need to be leveled because craftsman can’t control the thickness of tile adhesive. Therefore cement block walls need to be plastered leveled, in order to have a nice wall tiles.

Large size porcelain tiles as any product have advantages and disadvantages as mentioned above. Now after reading this you can decide if the large size tiles fit this space or not. Feel free if you have any questions!

large tiles look like marble, Gaza 2019
large tiles look like marble, Gaza 2019