Applications

Claycasein applications: a trowel floor without cement, and more

Claycasein applications start with a trowel floor without cement and do not end there. Claycasein adheres to many substrates and so ends up on walls, as a kitchen splashback, on furniture and stairs. All photos come from our customers projects, most of them done by the owners themselves. Every surface carries the handwriting of the person who trowelled it.

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Grey Claycasein trowel floor without cement in a loft with a ribbon window and a bench

Claycasein applications at a glance

Claycasein is a clay casein trowel compound for seamless surfaces, without cement and without plastics. It is trowelled onto floors, walls, ceilings, kitchen splashbacks, furniture, door leaves, worktops and stairs, in 2 to 3 layers of about 1 mm each.

Substrates: screed, concrete, wood, Fermacell, plasterboard, gypsum fibreboard, plaster, rammed earth and clay screed. Tiles need levelling first
Underfloor heating: possible, at low temperature
Material needed: approx. 1,000 to 1,350 g per m² for 2 to 3 layers
Finish: oiled and waxed, wipeable, comparable to an oiled wooden floor
Not suitable: the direct wet area. Claycasein must not stay permanently damp

Living room with an archway and rug on a Claycasein clay floor in Base, without added pigment

Six surfaces

Where the trowel floor without cement has already been laid

From our customers projects. Most of them trowelled by the owners themselves, some with us on WhatsApp.

Beige clay floor under a sloping ceiling, small lattice window and a wall niche — **Seamless floor**Trowel floor without cement, best on crack-free screed. Also works on concrete, Fermacell, rammed earth and clay screed. Low-temperature underfloor heating: yes.

Wall coating with Claycasein in Grau 5.1 in a small WC with wooden walls and patterned tiles — **Wall coating**Wipeable, also in the bathroom outside the direct wet area. On plaster, plasterboard, gypsum fibre and, after casein primer, on clay plaster.

Kitchen splashback with Claycasein in Beige 10 above the hob, wipeable and hard-wearing — **Kitchen splashback**Instead of tiles, also on old tiles after preparation. Worktops have been coated too.

Dark troweled table top with a vase of flowers, wooden and metal chairs — **Furniture and wood**Door leaves, table tops, worktops. Even upcycling: a plastic-coated board after priming.

Seamless stairs with landing in Claycasein Grau 80.20 in front of the dining area — **Stairs and steps**Floor and stairs in one piece, seamlessly drawn over the treads.

Listed building renovation: washbasin in front of a natural stone wall on a seamless Claycasein clay floor in Beige 10 — **Floor in a listed building**Old buildings and renovation: clay suits clay. In the bathroom only outside the direct wet area.

Not suitableThe direct wet area. Claycasein must not stay damp permanently and must not connect directly to the shower tray.

Directly on tiles?No long-term experience yet. Our advice: rework tiles first with a filler or levelling compound and reinforcement mesh.

Application guide step by step

Impressions

Here Claycasein was trowelled onto wooden boards in Grau 5.1.

Insights

Projects by application

Floors, walls, kitchens and furniture from customer projects. Filter by application. More regularly on Instagram.

Seamless clay floor in beige in an attic room, wooden post and lounge chair by the window — Beige 10 · Attic room

Close-up of a Claycasein floor with a terrazzo look, dark aggregates as fine specks in the light surface — Grau 80.20 · Surface in detail

Black wood stove on a Claycasein floor with a terrazzo look and dark speckles — Grau 80.20 · Living room with a wood stove

Long hallway with a seamless clay floor in beige, coats hanging on the wall — Beige 10 · Hallway

Cloudy troweled clay floor in grey, grey sofa in front of a wooden wall — Grau 5.1 · Living room

Beige wall coating in a kitchen above a dark worktop, wooden wall unit — Grau 80.20 · Kitchen, wall above the worktop

Large grey clay floor in a living room with an arched window and a dark sofa — Beige 10 · Living room with an arched window

Guest toilet with an anthracite clay floor, white basin and gold tap — Guest toilet, outside the direct wet area

Beige clay floor in the passage to the dining area, patterned rug on the floor — Beige 10 · Passage to the dining area

Living room with a beige clay floor, light sofa and rug by the window — Beige 10 · Living room

Round wooden table with chairs on a beige clay floor, a cat lying beside it — Beige 10 · Dining area

Dining corner with a small wooden table and a chair with a sheepskin on a beige clay floor — Beige 10 · Dining corner

Dining room with a dark clay floor, round dining table under a wooden ceiling — Grau 80.20 · Dining room

Light clay floor in front of a black wood stove with a burning fire, stairs in the background — Grau 9.5.05 · Living room with a wood stove

Bathroom with a beige clay floor, wooden washstand and a curtained window — Beige 05 · Bathroom, outside the direct wet area

Light clay floor in a studio with a wooden ceiling, work table and mobile drawer unit — Base · Studio

Beige clay floor at the foot of the stairs, a patterned runner leading to the white staircase — Beige 10 · Staircase

Brown clay floor in a white vaulted room with a sideboard and a stool — Base · Living room with a vault

Light clay floor in the hallway of a half-timbered house, dark staircase and a lattice window — Beige 10 · Hallway in a half-timbered house

Light clay floor in a kitchen with a stainless steel island and an open shelf — Grau 80.20 · Kitchen

Grey clay floor in a living room with a wide window front and armchairs — Grau 9.5.05 · Living room

Grey clay floor in an empty room with floor-to-ceiling windows looking into autumn woods — Grau 80.20 · Living room facing the woods

Detail of a grey clay floor with the edge of a sofa, a rug and window shadows — Grau 80.20 · Living room, detail

Dark troweled wall niche with a shelf, a watermelon resting on it — Schwarz 10 · Wall niche

Frequently asked

Questions about the applications

Substrates, tiles, underfloor heating and bathrooms: the questions we hear most.

On which substrates has Claycasein already been applied?

Claycasein adheres to many substrates. It has already been applied on screed, concrete, wood, Fermacell dry screed, plasterboard, gypsum fibre boards, plaster, rammed earth floors, clay screed and, after priming, even on plastic veneer. Important: the substrate must be dry, load-bearing and free of cracks. When in doubt, lay a test area.

Can I apply Claycasein directly on tiles?

We currently do not recommend it, even though trowelling directly on tiles has been done successfully: we have no long-term experience with it yet. Our advice: rework the tiles first with a suitable filler or levelling compound and reinforcement mesh. Your builders merchant knows which product fits.

Does Claycasein work with underfloor heating?

Yes, with standard low-temperature underfloor heating. The heating stays off during application and drying.

Does Claycasein work in the bathroom?

In the bathroom only to a limited extent, in the direct wet area not at all. Outside of it Claycasein works well, for example on the wall behind the washbasin. Do not connect it directly to the shower tray: Claycasein must not stay damp permanently. In entrance areas it works with a dirt-trapping zone. Frequent standing water leaves marks, as on a wooden floor.

How hard-wearing is the surface?

Comparable to an oiled wooden floor, also in sensitivity. The test value for abrasion is 0.01 g, measured on the Base material without oil and wax. Claycasein feels warm, similar to wood. The thin layer of 2 to 3 mm has no insulating effect though. On a clay masonry stove, 50 to 60 °C were measured without any negative effect.

Seamless Claycasein clay floor in Beige 10 in an old building with an old wooden door and patterned tiles, built by the owners — Floor in Beige 10

Origin

Made in the Zollernalb district, shipped across Germany

Claycasein comes from RENNER in Balingen, Baden-Württemberg. Florian Renner developed the recipe in 2022 out of his work on existing buildings, and it is made in small batches. We ship across Germany, and in Denmark our partner Havnens Haender in København supplies it. Before we write a quote we look at your project: substrate, area and colour. The test values for the Base were determined by HAWK Hildesheim. Claycasein is a natural product made from 100 % natural raw materials.

Who is behind it

Does Claycasein suit your project?

Send us the area, the substrate and two photos. We will tell you honestly what works and calculate the material you need.

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