Have exterior tiles

There are tiles that can also be used outside. Important is the correct grouting of the exterior tiles. What should be considered when grouting outdoor tiles can be read here.

Tiles for outdoor use

First, a distinction must be made according to the type of tiles. In particular, the following types of tiles must be distinguished for outdoor use:

  • ceramic tiles for outdoor use
  • Natural stone tiles for outdoors
  • cement tiles

For natural stone tiles or slabs, a suitable joint mortar must be used. For ceramic tiles, conventional grouts can be used. Regardless of which tiles or panels you use now; In any case, the joint must later be waterproof and frost-proof.

Cement tiles and natural stone tiles on the outside

Cement tiles and natural stone tiles can also be grouted instead of pure cement mortar. Trass cement is quite flexible and waterproof. In addition, it is durable in the outdoor area. Only with steel (steel reinforcements in foundations, slabs, etc.) is this mortar, which has been used for many hundreds of years, not compatible. For example, if you have a natural stone pavement such as a granite pavement with trass cement, you will experience it as you follow the link.

Why waterproof joints?

This quickly begs the question, why waterproof joints? It's about frost protection. Tiles are usually laid on a substrate such as a concrete slab or screed floor. So that the ground is not permeable to water.

If water could now seep into the tile joints, this would accumulate between the floor slab and the tiles. If it comes to frost, the tiles and joints are blown up. Now more water can penetrate and the frost damage spreads rapidly.

Grout ceramic tiles on the outside

Now de tiles work in the outdoor area as well. In particular, the thermal expansion can be extreme (direct sunlight during the day, at night temperatures below freezing). Conventional cementitious grout would be waterproof, but also rigid. Conventional cementitious grout would crack immediately so that water penetrates.

So at least a high-quality tempered grout must be used. Like flex tile adhesive, the flexible joint mortar is tempered with plastic and thus becomes more flexible. However, it is especially important here to rely exclusively on products of well-established manufacturers, because with cheap products is quite often once again saved on the remuneration.

Alternative grouts to cement-based grout

Alternatively, there are still joint compounds based on synthetic resin and polymers. Resin grout (epoxy), however, is only up to 60 degrees Celsius resistant. Polymer joint compound, however, is extremely flexible and durable. For a long time it was reserved for the industrial sector, but is now used more and more frequently around the residential building.

Tips & Tricks

The actual grouting is done in the same way as you have other floor tiles.

Artikelbild: CobraCZ / Shutterstock

Video Board: Front porch tiling with stone look tiles