Porto Mist

Porto Mist Cork Flooring

Swiss-made 11 mm floating plank with a class 33 commercial-use rating. Published impact-sound data lists 18 dB; review the tested assembly.

Porto Mist has three layers: a full 3mm layer of natural cork on top, a 6.8mm E1-grade moisture resistant HDF core in the middle, and a 1.2mm agglomerated cork backing underneath. At 11mm (7/16 inch) overall, each 913mm x 305mm (35-15/16 x 12 inch) plank has real substance underfoot, with a square edge and no bevel for a clean, continuous surface across the room.

Cork's closed cellular structure is filled with air-like gas, which is what gives this floor its character. It holds a comfortable temperature all year, so walking barefoot in winter does not mean cold feet, and it stays permanently elastic, absorbing impact instead of transmitting it through the house. Active households with kids, pets, or open-plan living notice the difference immediately.

The surface is sealed with a HotCoating wear layer and a highly resistant Natural Shield water base polyurethane finish, tested to AC5 abrasion resistance. That is why Porto Mist is rated for domestic class 23 and heavy commercial class 33 use: it keeps its looks for years with very little care, in living rooms and storefronts alike.

Installation is a weekend job, not a contract job. The Uniclic click lock profile floats over your subfloor with no glue and no nails, and the plank is approved for above grade, on grade, and below grade rooms, so basements are on the table too.

Why this floor

• 18 dB impact sound reduction (EN ISO 717-2) from the cork top layer and 1.2mm agglomerated cork backing: quieter rooms above and below.
• Rated commercial class 33 and domestic class 23 (EN 16511) with AC5 abrasion resistance, backed by a 15 year residential and 5 year commercial warranty.
• Genuine 3mm natural cork wear surface over a 6.8mm E1-grade moisture resistant HDF core: 11mm of total build, with Uniclic locking strength tested above 500 kg/lfm (ISO 24334).
• Thermal resistance of 0.108 m² K/W and cork's gas-filled cell structure keep the surface comfortable year round, and the floor is compatible with electric, hydronic, and underfloor radiant heating.
• Approved for below grade installation, with dimensional stability under 0.05% and 24 hour swell under 8% (EN 317).
• Made in Switzerland from a renewable raw material: cork oak bark is harvested without felling the tree, and a single oak can be peeled around 20 times over a 200 year life.
• Certified low-emission: GreenGuard Gold certificate and formaldehyde test report available in the guides below.