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7 min read · MIKOL Editorial
Most people think about indoor air quality in terms of ventilation — opening windows, running fans, buying an air purifier. What they rarely consider is the air quality impact of the materials covering their floors, countertops, and walls.
Every surface in your home is either contributing to cleaner air or quietly degrading it. The distinction often comes down to one question: is the material natural or synthetic?
Volatile organic compounds — VOCs — are chemicals that evaporate at room temperature and accumulate in indoor air. They originate from an enormous range of common household materials: laminate flooring, engineered wood, vinyl wall coverings, synthetic carpets, composite cabinetry, and many adhesives and sealants.
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According to research published by Small Planet Supply, many building materials release toxic gases including formaldehyde and toluene — in a process called off-gassing that can persist for anywhere from 72 hours to over 20 years after installation. |
In a well-ventilated space, the impact is manageable. In the average modern home — sealed for energy efficiency, with limited air exchange — VOCs accumulate. The result is what researchers call Sick Building Syndrome: a range of health symptoms, including headaches, fatigue, respiratory irritation, and impaired cognitive function that improve when occupants leave the building.
Stone is a geological material. Marble, granite, limestone, and quartzite form over millions of years through physical processes that involve no synthetic binders, adhesives, chemical treatments, or polymer compounds. The molecular structure that results is chemically inert at room temperature.
This means natural stone does not off-gas. It does not release formaldehyde. It does not emit toluene, benzene, or acetaldehyde. The air above a marble countertop is the same air that entered the room.
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Research from the University of Milan found that spaces featuring natural stone installations maintained consistently lower VOC levels over a 12-month monitoring period compared to spaces finished with synthetic materials. |
Natural stone certified by organisations such as the Natural Stone Institute qualifies for LEED credits specifically related to indoor air quality — a formal recognition of its contribution to healthier indoor environments.
Natural Stone vs Engineered Quartz
Engineered quartz (such as Caesarstone or Silestone) contains 90–95% crushed quartz bound together with polymer resins — typically polyester or epoxy. These resins can off-gas during the first months after installation. Natural stone contains no resins. Its air quality profile is unchanged from installation day to decade three.
Natural Stone vs Laminate Flooring
Laminate flooring is a primary source of formaldehyde in domestic environments. The core material — typically high-density fibreboard — uses urea-formaldehyde as a binding agent. Stone tiles contain no wood-based composites and no binders of any kind.
Natural Stone vs Vinyl and LVT
Luxury vinyl tile has become popular for its water resistance and easy installation. But vinyl is a petroleum-derived plastic product that can off-gas plasticisers over time, particularly in warm environments. Stone is thermally stable and chemically inert across all normal domestic temperature ranges.
Natural stone is typically sealed after installation, and sealant choice matters. Conventional fluoropolymer sealants contain chemicals that can off-gas in their own right. If you are installing stone for air quality reasons, use a water-based, low-VOC stone sealer. This maintains the stone's zero-off-gassing advantage from surface to room air.
MIKOL marble accessories ship pre-sealed with a formulation chosen for durability and low chemical impact — the same philosophy applied at the countertop scale.
• When renovating: specify natural stone for countertops, floors, and splashbacks over engineered alternatives
• When choosing flooring: stone tile or natural hardwood significantly outperforms laminate and LVT on VOC emissions
• When buying accessories: objects made from natural stone — marble trays, notebooks, desk accessories — contribute no VOCs to the rooms they occupy
• Test your air: a VOC monitor (widely available under $100) measures baseline levels before and after material changes
The materials in your home are not neutral. Every surface is either adding chemical load to your indoor air or contributing nothing. Natural stone is one of the few finish materials that genuinely contributes nothing, and that is precisely why it has been used inside the finest buildings for thousands of years.
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