Why Material Choice Is Central to Biophilic Design
Of all the elements of biophilic design, material selection is perhaps the most overlooked — and the most impactful. The materials that surround us in our homes affect not just how spaces look, but how they feel, smell, and sound. Natural materials engage our senses in ways that synthetic alternatives cannot replicate.
This is not merely aesthetic preference. Research in environmental psychology has consistently shown that exposure to natural materials — timber, stone, linen, wool, rattan — reduces stress, lowers blood pressure, and improves mood. The tactile quality of natural materials activates neural pathways associated with safety and comfort that evolved over millennia of human contact with the natural world.
The Essential Natural Materials
Timber
Timber is the most versatile and widely used natural material in interior design. Research by the University of British Columbia found that exposed wood in interior spaces reduces physiological stress responses — lower heart rate and blood pressure — compared to spaces without wood.
For biophilic interiors, prioritise solid timber over engineered wood products (MDF, particleboard) wherever possible. Solid timber is more durable, more repairable, and doesn't off-gas formaldehyde. When engineered wood is necessary, choose formaldehyde-free products certified to E0 or CARB Phase 2 standards.
Best applications: Flooring, furniture, wall panelling, ceiling beams, window frames, staircases, kitchen worktops.
Sustainable choices: FSC-certified timber, reclaimed timber, locally sourced hardwoods, bamboo (technically a grass, but with similar properties to timber).
Stone
Stone brings a sense of permanence, weight, and geological time to interior spaces. Its cool touch, varied texture, and natural pattern variations create a sensory richness that no synthetic material can replicate.
Natural stone varies enormously in character: the warmth of travertine, the drama of marble, the rugged texture of slate, the earthy quality of sandstone. Each type brings a different mood to a space.
Best applications: Kitchen and bathroom countertops, flooring, feature walls, fireplace surrounds, decorative objects.
Sustainable choices: Locally quarried stone (to reduce transport emissions), reclaimed stone, limestone and sandstone (lower embodied energy than granite or marble).
Linen and Natural Textiles
Natural textiles — linen, cotton, wool, silk, jute, hemp — bring softness, texture, and colour to biophilic interiors. They're also more sustainable and healthier than synthetic alternatives, which shed microplastics and can off-gas VOCs.
Linen is the gold standard biophilic textile. Made from flax, it's one of the most sustainable fibres in existence, requiring minimal water and no pesticides. It's naturally thermoregulating, antibacterial, and becomes softer with every wash.
Best applications: Curtains, bedding, upholstery, cushions, table linens, rugs.
Sustainable choices: Organic cotton (GOTS certified), European linen (OEKO-TEX certified), recycled wool, natural jute and sisal for rugs.
Rattan and Wicker
Rattan, wicker, and other woven plant materials bring a relaxed, tropical quality to biophilic interiors. Their open weave creates interesting light and shadow patterns, and their warm, honey tones complement both neutral and colourful palettes.
Rattan is one of the most sustainable materials in interior design — it grows rapidly, requires no replanting, and sequesters carbon throughout its life. It's also lightweight, durable, and increasingly available in sophisticated, contemporary designs.
Best applications: Furniture (chairs, tables, headboards), lighting (pendants, table lamps), accessories (baskets, trays, mirrors), plant pots.
Cork
Cork is one of the most underused natural materials in interior design. Harvested from the bark of cork oak trees without harming the tree, it's one of the most sustainable materials available. It's also warm, soft, acoustically insulating, naturally antimicrobial, and hypoallergenic.
Best applications: Flooring (particularly in bedrooms and home offices), wall tiles, bulletin boards, coasters and trivets, insulation.
Terracotta and Ceramics
Terracotta — literally "baked earth" — brings warmth, texture, and an ancient quality to biophilic interiors. Its porous nature means it breathes, making it ideal for plant pots (plants in terracotta pots are less prone to overwatering than those in glazed or plastic containers).
Best applications: Plant pots, floor and wall tiles, decorative objects, tableware.
Combining Natural Materials
The most successful biophilic interiors combine multiple natural materials to create the sensory richness of natural environments. A useful framework is to work with three to four materials in complementary tones:
A warm, light palette might combine pale oak flooring, white-washed linen walls, natural cotton upholstery, and rattan accessories. A darker, more dramatic palette might combine dark walnut furniture, slate flooring, deep linen curtains, and terracotta plant pots.
The key is to vary texture while maintaining tonal coherence — rough and smooth, matte and sheen, light and dark — within a palette that references the natural world.
Frequently Asked Questions
Are natural materials more expensive than synthetic ones? In the short term, often yes. But natural materials are typically more durable, repairable, and timeless than synthetic alternatives. A solid oak floor will last a lifetime and can be refinished multiple times; a laminate floor will need replacing after 15–20 years. The long-term cost is often lower.
Are natural materials sustainable? It depends on the source and production method. FSC-certified timber, organic cotton, European linen, and sustainably harvested rattan are among the most sustainable materials available. Exotic hardwoods, conventionally grown cotton, and some stone types have significant environmental impacts.
How do I care for natural materials? Natural materials generally require more care than synthetic alternatives but reward that care with greater longevity. Timber needs occasional oiling or waxing; stone needs sealing; linen improves with washing; rattan benefits from occasional oiling to prevent drying and cracking.
