Interior Design Materials: 10 Best Options for Sustainable Spaces

Choosing the right interior design materials can shape the entire look, feel, and function of a space. While wood, stone, and metal remain reliable staples, a growing number of innovative and eco-conscious options are changing the way designers and homeowners approach interiors. Each interior material brings its own texture, story, and performance characteristics that influence everything from acoustics to thermal comfort.

This guide explores both classic and emerging materials used in interior design, covering their properties, best applications, and how they align with the push toward more sustainable living spaces. Whether you are renovating a single room or planning a full residential project, understanding these materials will help you make informed, confident choices.

Why Interior Material Selection Matters

The materials you choose for your interior go far beyond aesthetics. They directly affect indoor air quality, energy efficiency, acoustic performance, and long-term maintenance costs. A well-chosen material can reduce heating and cooling demands, absorb unwanted noise, and even contribute to better occupant health by limiting exposure to volatile organic compounds (VOCs). According to the U.S. Environmental Protection Agency (EPA), indoor air can be two to five times more polluted than outdoor air, making material choices a public health consideration.

Sustainability has moved from a niche concern to a core design principle. A 2024 report by the World Green Building Council found that the building and construction sector accounts for roughly 37% of global energy-related CO2 emissions. Selecting materials with lower embodied carbon, longer lifespans, and recyclable or renewable characteristics is one of the most effective steps designers can take to reduce that footprint.

Reclaimed Wood

Reclaimed wood has become a sought-after interior material for homeowners and designers who value character, sustainability, and warmth. Sourced from old barns, factories, and warehouses, this material provides a rich texture and history that new lumber cannot replicate. The weathered grain patterns and aged patina give each piece a distinct personality.

Credit: 25 Ingenious Ways to Bring Reclaimed Wood into Your Home Office | Decoist

The use of reclaimed wood reflects a growing emphasis on sustainable design in interiors. It can be used in furniture, wall paneling, flooring, and ceiling beams. Because the wood has already undergone decades of natural drying and aging, it tends to be more dimensionally stable than freshly milled lumber, which means less warping and shrinking over time.

From a cost perspective, reclaimed wood typically runs 20-50% more than equivalent new hardwood, but the unique visual character and environmental benefits often justify the premium. Designers frequently pair it with industrial metals or polished concrete to create a balanced contrast between raw and refined.

Terrazzo

Once a fixture of mid-century modern design, terrazzo has seen a major revival across both residential and commercial interiors. This composite material consists of chips of marble, quartz, granite, or glass set in a cementitious or polymeric binder. The result is a speckled, mosaic-like surface celebrated for its durability and visual depth.

Terrazzo is a versatile interior material often used for flooring because of its toughness and ease of maintenance. It also works well as kitchen countertops, backsplashes, and even custom furniture like coffee tables and planters. Modern production techniques now allow designers to specify custom color blends, chip sizes, and binder tones, which means each terrazzo surface can be tailored to the project.

One advantage that sets terrazzo apart is its lifespan. Properly maintained terrazzo floors in buildings like the Venice airport terminal have lasted over 50 years with minimal degradation. For spaces with heavy foot traffic, few materials match this combination of beauty and endurance.

Comparison of Popular Interior Material Options

The following table summarizes key attributes of the materials discussed in this guide to help you compare them at a glance:

Cork

Cork has been steadily growing in popularity as an interior material, and for good reason. Harvested from the bark of cork oak trees without harming the tree, it ranks among the most genuinely renewable building materials available. A single cork oak can be harvested approximately every nine years for up to 200 years, according to the Portuguese Cork Association (APCOR).

Credit: Sustainable wall coverings – Vertical 3D Cork | ArchitectureAU

Cork has excellent insulating properties, both thermal and acoustic, making it a strong choice for flooring in bedrooms, home offices, and media rooms. Its soft, cushiony texture is comfortable underfoot, which reduces fatigue during long periods of standing. Cork can also be applied to walls for a warm, textured look or used as a functional pin-able surface in workspaces.

For anyone exploring eco-friendly interior materials, cork checks nearly every box: it is renewable, recyclable, hypoallergenic, and naturally resistant to mold and mildew. Its cellular structure traps air, which is what gives it those impressive thermal and sound-dampening qualities.

Living Materials: Green Walls and Moss Walls

One of the most visually striking trends in interior design is the use of living materials. Green walls (also called vertical gardens or living walls) bring actual plant life into your interior as a design element. These walls are covered with live plants grown in a soil-based or hydroponic system mounted to a wall structure, adding a dynamic, biophilic dimension to any room.

Living walls or green walls can serve as eye-catching features in a living room, dining room, or even a home office. Beyond their aesthetic appeal, they help improve indoor air quality by filtering certain pollutants and increasing oxygen levels. Research from institutions like NASA has confirmed the air-purifying capacity of specific indoor plant species, though the practical effect depends on plant density and room ventilation.

Moss walls offer a lower-maintenance alternative. Preserved moss requires no watering, soil, or sunlight, yet retains a lush, natural appearance for years. Designers often use moss walls as art installations or focal points because of their soft texture and ability to absorb sound. They work especially well in open-plan offices and hospitality spaces where acoustic control matters.

If biophilic design appeals to you, explore more ideas for sustainable interiors in modern homes and learn how natural elements can transform everyday spaces.

Recycled Glass

Recycled glass is an eco-friendly interior material that supports the circular economy while offering a wide range of visual effects. Post-consumer glass from bottles, jars, and windows can be processed into countertops, backsplash tiles, terrazzo aggregates, and decorative accents.

Credit: Reused and Recycled Materials in 10 Interior Design Projects | ArchDaily

The aesthetics vary depending on the glass source and manufacturing process. Some recycled glass surfaces have a translucent, jewel-like quality, while others achieve a more subtle, frosted appearance. Glass can be recycled repeatedly without losing quality, which makes it one of the few truly circular materials in interior design.

One practical advantage: recycled glass countertops are non-porous when properly sealed, making them resistant to staining and bacteria. This makes them a solid option for kitchens and bathrooms. You can read more about sustainable materials for a conscious home on illustrarch.com.

Rammed Earth

Rammed earth is an ancient construction technique experiencing a resurgence in modern architecture and interior design. The process involves compressing a damp mixture of earth, cement, and sometimes natural pigments into a supported frame, creating solid walls with beautiful, stratified color bands.

The result is a sturdy, energy-efficient wall with natural striations that no two surfaces share. Rammed earth walls have excellent thermal mass properties: they absorb heat during the day and release it slowly at night, which helps regulate indoor temperatures without relying heavily on mechanical systems. This characteristic makes rammed earth particularly effective in climates with large day-to-night temperature swings.

In interior design, rammed earth is used primarily for feature walls, fireplace surrounds, and occasionally for custom shelving. The material’s earthy palette and layered texture create a grounding, meditative quality in living spaces. Architects like Rick Joy have demonstrated how rammed earth can anchor a contemporary design with warmth and authenticity.

Bio-Based Materials

Bio-based materials represent one of the most exciting frontiers in interior design. These materials are derived from renewable biological sources, and they range from well-established options like bamboo to cutting-edge innovations like mycelium composites.

Mycelium (the root network of mushrooms) can be grown into custom shapes and dried to form lightweight, fire-resistant panels and packaging. Companies like Ecovative and MycoComposite are producing mycelium-based acoustic tiles, insulation boards, and even furniture. The material is fully biodegradable, and its production requires a fraction of the energy used for synthetic alternatives.

Credit: Aguahoja on Behance

Other bio-based materials gaining traction include bamboo (which grows to harvestable size in three to five years), hemp (used for hempcrete insulation and textiles), flax (processed into durable linen and composite panels), and algae-based bioplastics. For a deeper look at these materials in construction, see our guide on eco materials in house construction.

Natural Stone and Engineered Alternatives

No discussion of interior design materials would be complete without addressing natural stone. Marble, granite, limestone, and slate remain among the most prestigious choices for countertops, flooring, and wall cladding. Each slab is unique, offering color variations and veining patterns that manufactured surfaces cannot fully replicate.

However, the environmental cost of quarrying and transporting natural stone is significant. This has driven growth in engineered stone alternatives like quartz composite and sintered stone (such as Dekton and Neolith). These products combine natural minerals with resins or are fired at extreme temperatures, producing surfaces that are harder, less porous, and more consistent than natural stone, while often incorporating recycled content.

For projects where authenticity matters most, locally sourced stone is the most sustainable natural stone option, since it eliminates long-distance shipping emissions. Pairing stone with warmer materials like wood or textiles helps avoid a cold, institutional feel in residential settings.

Textiles and Soft Materials in Interior Design

Soft furnishings and textiles complete the material palette of any interior. The choice of upholstery, curtain fabric, rugs, and cushions affects comfort, acoustics, and visual warmth. From a sustainability standpoint, modern interior material choices increasingly favor natural fibers like organic cotton, linen, wool, and hemp over synthetic alternatives.

Natural fibers are biodegradable, breathable, and typically produced with fewer chemicals. Linen, for instance, is made from flax and requires considerably less water and pesticide input than conventional cotton. Wool is naturally flame-retardant, moisture-wicking, and an effective sound absorber, making it a functional as well as aesthetic choice.

When selecting textiles, look for certifications like GOTS (Global Organic Textile Standard) or OEKO-TEX, which verify that fabrics meet strict environmental and safety criteria. These labels help you avoid materials treated with harmful dyes, formaldehyde finishes, or other problematic chemicals.

How to Choose the Right Interior Material for Your Project

Selecting materials is not just about picking what looks good in a showroom. Several practical factors should guide your decisions:

Match Materials to Room Function

Kitchens and bathrooms need water-resistant, easy-to-clean surfaces like sealed stone, recycled glass, or porcelain. Living rooms and bedrooms benefit from warmer, softer materials like cork, wood, and natural textiles. High-traffic hallways demand materials with proven abrasion resistance.

Consider the Full Lifecycle

Think beyond the purchase price. A material’s true cost includes installation, maintenance, lifespan, and disposal. Cork flooring, for example, may cost more upfront than vinyl, but it lasts decades and is fully recyclable at end of life. For a detailed framework, review our guide to choosing materials for home renovations.

Prioritize Indoor Air Quality

Always check VOC ratings for paints, adhesives, and composite materials. Low-VOC and zero-VOC products protect occupant health without sacrificing performance. Certifications from organizations like GREENGUARD can help identify safer products.

Balance Aesthetics with Performance

The best interiors use contrasting materials to create visual interest while meeting functional needs. Pairing rough textures (like rammed earth or reclaimed wood) with smooth surfaces (like polished terrazzo or glass) creates depth. Mixing warm and cool tones across materials gives a room dimension without visual clutter.

Cost estimates and material performance data are approximate and vary by region, supplier, and project scope. Always consult with a qualified interior designer or contractor for project-specific recommendations.

Final Thoughts on Interior Design Materials

When planning your next interior design project, think beyond the conventional and consider using one or more of these innovative interior materials. Reclaimed wood, terrazzo, cork, living walls, recycled glass, rammed earth, and bio-based composites each bring a unique aesthetic and performance profile to a space. Many of them are also sustainable choices that help reduce your environmental impact while creating healthier indoor environments.

The materials you select tell a story about your values and priorities. By choosing wisely, you create spaces that look beautiful today and remain responsible choices for years to come. For more inspiration, browse our articles on sustainable and functional interior spaces and explore the latest furniture interior design trends.