Materials · 8 min read
Sustainable Materials in Interior Fit-Out: Sustainable Means Long-Lasting
Picture running your hand along the oak in twenty-five years' time. It is smooth, a little darker, with a small mark from the winter you moved in, and you would not change a thing. That is what sustainable means in a home: not a label, but a surface that is still worth touching.
Imagine a couple in their mid-forties who have bought a Gründerzeit apartment (from the late nineteenth-century building boom) in Hietzing. High ceilings, box-type windows, an old oak parquet under a grey fitted carpet, panelled doors with several layers of paint. At the first meeting they say something we hear often: "We want to do this properly once and then have twenty-five years of peace." They do not want a kitchen that ends up on the skip after eight years, or a floor that cannot be repaired.
Contents
- Why longevity is the most important measure
- Keeping what exists: the first sustainable step
- Materials that are allowed to age
- Repairability: the underrated property
- Healthy living: emissions and indoor air
- A comparison by life cycle
- Planning and building locally
- Designing timelessly: protection from the next trend
- Five steps to a long-lasting interior
- Frequently asked questions
- What happens next
Why longevity is the most important measure
Every material has a history before it reaches the apartment. It was quarried, cut, fired, transported, packaged. This so-called embodied energy is in the product whether it is used for five years or fifty. A kitchen cabinet that lasts twice as long halves its ecological footprint per year.
That is why the question "How long will this last?" matters more than the question "What is this made of?" A bamboo floor from overseas that is worn out after ten years is less sustainable than a local oak floor that is sanded four times and stays down for a hundred years.
The most sustainable kitchen is not the one with the greenest brochure. It is the one you still like after twenty years.
Longevity has three sides: technical durability, repairability and design timelessness. All three must be right. An indestructible material that you can no longer bear to look at after seven years will be ripped out all the same.
What a throwaway choice costs. A kitchen replaced after eight years, a floor that cannot be sanded, a front you can only renew with the whole kitchen: each is easy on the day and heavy over the decades, for your home and for the planet. Before buying anything new, look at what is already there.
Keeping what exists: the first sustainable step
Before we talk about new materials, we look at what can stay. In many Viennese Altbau apartments (the pre-1945 apartment buildings) there is a parquet under the carpet or laminate that looks better after sanding than any new installation. Panelled doors can be stripped and repainted. Box-type windows can be overhauled and sealed instead of replaced.
In our example, an oak parquet in a panel pattern comes to light under the carpet, damaged in places but restorable. Missing strips are supplied from a room that is being converted into a bathroom anyway. The doors are overhauled in the workshop of Tischlerkultur, the fittings cleaned and refitted. Imagine the first morning: light across the restored boards, and the sound of them underfoot. Why the charm of an Altbau is better served by an overall concept is described in our piece on the Altbau apartment in Vienna. And what about the materials you do buy new?
Materials that are allowed to age
Some materials become more beautiful over the years. Solid wood and good veneer acquire patina, natural stone becomes softer in expression, brushed brass darkens. These materials do not have to be replaced when they show marks; they can be cared for and refreshed.
Wood is a particularly good case in interior fit-out. It stores carbon while it grows, can be sourced from sustainable European forestry and can be reused at the end of its life. Certifications such as FSC or PEFC help to verify origin. How oak, walnut and ash age is described in the article on solid wood in interior fit-out. Whether veneer or solid wood is the better choice is answered by the piece Veneer or solid wood?, and the answer is more nuanced than many expect.
Ceramic and natural stone are energy-intensive to produce, but last for decades when properly laid. A terrazzo floor can be re-ground after forty years and looks like new again. More on this in the piece on terrazzo. Age is one thing. Whether a piece can be mended is another.
Repairability: the underrated property
A material is only as durable as it is repairable. A scratch in oiled wood can be sanded out. A scratch in high-gloss lacquer stays. A screwed construction can be taken apart, a glued one cannot.
When planning we therefore pay attention to details you only appreciate after years:
- Replaceable fittings: hinges, drawer runners and handles from manufacturers whose parts will still be available in ten years.
- Screwed rather than glued joints: where construction allows, so that furniture can be dismantled and rebuilt.
- Oiled surfaces: in places where wear appears, such as tabletops and handle rails.
- Individually replaceable fronts: a damaged kitchen front should be replaceable without renewing the whole kitchen.
- Access hatches: so that pipes behind fitted units remain reachable without destroying anything.
- Documentation: material, colour and supplier of every surface are recorded so that reordering is possible.
These points are one reason why we prefer to build fitted furniture in our own joinery. What has once been drawn and built can be extended or repaired years later by the same workshop. More on this on the page about fitted wardrobes and in the piece Made-to-measure fitted wardrobe or modular system?. Sustainable also means healthy, so what about the air?
Healthy living: emissions and indoor air
Sustainability also concerns the air you breathe in the apartment. Panel materials, lacquers, adhesives and upholstery can release volatile substances, especially in the first weeks after installation. Low-emission boards, water-based lacquers and natural oils and waxes reduce this load considerably.
Lime plaster and clay plaster are further good examples. They regulate moisture, are vapour-permeable and age calmly. In Altbau buildings with thick brick walls they often suit better than dense emulsion paints. Which colours and surfaces look calm in the long term is described in the piece on the colour concept.
A comparison by life cycle
The table compares common materials by the criteria that matter for a long-lasting interior. It is a guide that can vary depending on product and workmanship.
| Material | Durability | Repairable | Ages | Note |
|---|---|---|---|---|
| Solid wood, oiled | very high | very good | with patina | check origin |
| Veneer on carrier board | high | good, depending on thickness | with patina | conserves resources |
| Natural stone | very high | can be ground | softer in expression | consider transport distance |
| Porcelain stoneware | very high | replace tile | hardly | energy-intensive, but long-lived |
| Terrazzo | very high | can be re-ground | hardly | regional aggregates possible |
| Lime plaster | high | easily touched up | calm | vapour-permeable |
| High-gloss lacquer | medium | difficult | visible scratches | rather short-lived in daily use |
| Foil-wrapped fronts | medium | hardly | edges come loose | low initial price |
You will find honest assessments of the everyday suitability of individual surfaces in the article Easy to clean? Surfaces rated honestly. And who builds it matters as much as what it is built from.
Planning and building locally
Transport distances are part of the balance, but not the largest part. More important is that planning and production are close together. If the workshop is half an hour from the site, details can be agreed on the spot, mistakes corrected quickly and later adjustments dealt with without fuss.
Tischlerkultur builds in Münchendorf near Vienna, in a tradition that began in 1935. Good joinery is designed to be used for decades, and a workshop that has existed so long thinks in such timescales. That is not a marketing argument but a pointer to what craftsmanship can achieve. At Richard Atelier you speak to one person, and behind that person stands the workshop. You can see who stands behind Richard Atelier and Tischlerkultur on the team page. Why planning and execution from a single source also matter for the lifespan of an interior is described in the piece Planning and execution from a single source.
A piece of furniture built nearby can be repaired nearby. That sounds banal and is yet the core of sustainability.
Designing timelessly: protection from the next trend
The most common reason interiors are replaced is not wear but weariness. A kitchen in the trend colour of a particular year looks dated after five years, even if it is technically flawless.
Timeless does not mean colourless. It means choosing materials that are coherent in themselves, taking proportions seriously and placing accents where they are easy to change: in textiles, lighting, art. The large surfaces, meaning floor, fronts and walls, stay calm. How a materials concept draws this common thread through the apartment is described in the piece on the materials concept.
For our couple, this means: oiled oak for floor and fitted furniture, lime plaster in a warm white, natural stone in the bathroom, oak veneer fronts in the kitchen. Colour came through curtains, an olive-green sofa and lamps. In ten years the sofa can be reupholstered. The rest stays. Picture the room in the evening: the lime plaster warm in lamplight, the oak glowing, and nothing in it that asks to be replaced.
Five steps to a long-lasting interior
- Check what exists. What can stay, what can be restored?
- Think about life stages. How will the apartment be used in ten or twenty years? More on this in the piece on the next stage of life.
- Keep large surfaces calm. Choose floor, fronts and walls to be timeless, and place accents in interchangeable elements.
- Plan for repairability. Choose fittings, joints and surfaces so that they can still be repaired in years to come.
- Document. Record materials, colours and suppliers so that later additions match.
Frequently asked questions
What are sustainable materials in interior fit-out?
Sustainable materials are those that last long, can be repaired, are healthy for indoor air and come from responsible sources. These include above all solid wood and veneer from European forestry, natural stone, ceramic, terrazzo and mineral plasters. What matters is less the individual label than the length of service life.
Is solid wood more sustainable than veneer?
Not automatically. Veneer uses a valuable trunk very sparingly, because a lot of surface comes from one tree. Solid wood, on the other hand, can be sanded more often. Both are sustainable if they are used for a long time and come from verified sources. We help you choose per project.
Is it worth restoring old floors and doors?
Usually yes. An old solid parquet or a panelled door can often be restored with manageable effort and has a character that new products do not offer. You also save material and disposal. Bring photos and we tell you honestly what is worth saving.
How can I tell whether furniture is repairable?
By screwed joints, replaceable fittings, solid or thickly veneered surfaces and a manufacturer that supplies spare parts in the long term. For every fitted unit, ask what happens if a hinge breaks or a front is damaged.
Are sustainable materials more expensive?
Often slightly so to buy, but usually not over their lifetime. A kitchen that lasts twenty years is cheaper per year than one replaced after eight. Added to that are lower costs for disposal and re-planning.
Does indoor air play a role with sustainable materials?
Yes, a big one. Low-emission panel materials, water-based lacquers, natural oils and mineral plasters noticeably improve indoor air, especially in the first months after installation. This is particularly important for bedrooms and children's rooms.
