Granulated cork insulation

We offer the following fractions: 2–4 mm, 2–9 mm, 4–8 mm, and 3–15 mm.

Expanded cork is a natural insulation option made from the bark of the cork oak tree—the same tree used for wine corks. It comes as light, uneven granules that are rich brown in color and surprisingly effective.

The production process involves heating raw cork at high temperatures—no additives, no chemicals. As it heats, it releases a natural resin called suberin, which acts like glue. The cork expands, darkens, and forms a fluffy structure that delivers powerful thermal and sound insulation. It actually works better than standard cork due to its unique composition.

These granules are a go-to solution in building and remodeling. Since they’re loose-fill, they’re perfect for tricky spaces that pre-cut panels just can’t reach. Typical uses include:

• insulating attics, floors, walls, or tight and awkward spaces,
• adding insulation inside cavity walls and partitions,
• using between rafters in pitched roof systems,
• filling underfloor voids and hollow areas,
• leveling ceilings and uneven subfloors,
• dry floor systems,
• lightweight floor assemblies.

Outside the construction world, you’ll find even more uses:

• a natural bedding option for reptiles and exotic pets (totally safe and chemical-free),
• eco-friendly mulch for landscaping or plant beds,
• movie sets—used to replicate dirt, debris, or rubble for special effects,
• crafting and model scenes—great for realistic terrain or soil textures.

Absolutely. It’s certified by Poland’s National Institute of Public Health, confirming it’s non-toxic, non-irritating, and safe for allergy sufferers. As of now, we’re the only company in Poland offering certified expanded cork granules.

You’re looking at up to 50 years of performance—no drop in quality over time. It won’t soak up moisture, mold, or rot. It’s built to endure.