Terrace Slab WORK Anthracite 90x90 cm Concrete Look Rough 20 mm R11 Rectified

Anthracite gives outdoor spaces a clear, confident character. The terrace slab in Coal from the WORK collection feels dark, calm and striking at the same time. On the terrace, it lays a foundation that is modern and grounded without imposing itself.

Dark Concrete Look with Character

The rough surface in deep anthracite emphasises the raw, urban character of the concrete look. The subtle colour variation (V2) creates a natural variance that keeps the surface looking lively. The square 90x90 cm format produces expansive, generous outdoor surfaces. The rectified finish allows tight grout joints and a straight, linear laying pattern.

For Outdoor Use with 20 mm Thickness

At 20 mm thick, this slab is designed for outdoor applications. Slip resistance class R11 provides reliable grip even when wet. The glazed stoneware is frost-resistant and rated abrasion class PEI IV. For installation, we recommend an uncoupling mat and the use of a levelling system. Professional installation with a drainage system is recommended for terrace applications.

Frequently Asked Questions

Is the anthracite terrace slab approved for outdoor use?

Yes. The slab is 20 mm thick, frost-resistant and carries slip resistance class R11. This makes it suitable for outdoor use. For a durably safe installation on the terrace, we recommend professional laying with a drainage system.

How safe is the surface in rain and wet conditions?

With slip resistance class R11, the surface provides noticeable grip even when wet. The rough texture of the slab supports this further. Especially on terraces exposed to weather, this is an important safety factor.

Why is a levelling system recommended during installation?

With large-format slabs like this 90x90 cm piece, achieving an even lay without height differences is demanding. A levelling system helps to produce a flat, safe result and is therefore expressly recommended.

What grout joint width is possible with rectified slabs?

Rectified slabs have precision edges and can therefore be laid with very narrow grout joints. This has a particularly positive effect on the overall appearance with a format like 90x90 cm and creates a clean, modern look.

What does PEI IV mean for this terrace slab?

PEI IV is a classification of abrasion resistance. It indicates that the material is suitable for areas with high levels of use, which is an important quality indicator for a terrace or outdoor entrance area.