FREE SHIPPING FOR ALL ORDERS. ORDER NOW!

Granulated cork insulation

Many homeowners hesitate to step away from conventional insulation materials out of concern that something might go wrong. So they stick with what’s familiar—even if it’s outdated—and end up dealing with fixes and inefficiencies down the road. Expanded cork granules offer a smarter, worry-free alternative. This eco-friendly, loose-fill insulation is top-tier in both quality and performance, outperforming traditional cork in a number of applications. It's especially ideal for irregular spaces where rigid panels just won’t fit.

Got questions? We've got you covered.

WHAT EXACTLY IS EXPANDED CORK?

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.

WHAT CAN YOU USE EXPANDED CORK GRANULES FOR?

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.

IS IT SAFE TO USE CORK GRANULES?

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.

HOW LONG DOES IT LAST?

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.

When you're dealing with cramped corners or narrow gaps, traditional insulation just doesn’t cut it. Sometimes, even spray foam doesn’t get the job done. That’s where cork granules shine—you don’t need to trim or shape anything. Just pour and spread. It settles into the tightest spots without a fuss.

Some materials demand repairs or replacements every few months. Not this one. Expanded cork is a set-it-and-forget-it kind of product. Install it once, and you’re good. No breakdowns, no re-dos. It’s long-term peace of mind.

What’s more, it’s super lightweight. While most high-performance insulators are bulky and heavy, expanded cork is light as air. You get durability and energy efficiency without weighing down your structure.

And here’s the bonus—it’s eco-smart. Harvesting cork doesn’t involve cutting down trees—only the bark is removed, and it grows back naturally. The granules are made without chemicals and often produced using renewable energy. Plus, cork oak trees capture significantly more CO₂ than average trees, making them heroes in the climate game.