Unlike rubber underlayment, cork absorbs moisture unless it is sealed, which leads to swelling and deterioration over time. Therefore, a moisture barrier is necessary when using cork underlayment, adding to the overall cost and complexity of your flooring project.
Eco Cork Foam is the only underlayment with a built-in 6 mil vapor barrier to protect from moisture. This makes it the perfect underlayment for concrete subfloors and basements. Because the vapor barrier is bonded to the underlayment, moisture can't get trapped between the two layers and installation is much easier.
Very often, particularly in a below-grade installation on a concrete basement floor, a vapor barrier is recommended in addition to the underlayment. That vapor barrier would go between the subfloor and the underlayment.
Cork has a natural tendency to expand, contract, and absorb moisture, making it susceptible to mold growth. To prevent this issue, consider choosing flooring with antimicrobial underlayment. You'll appreciate this decision in the long run.
Cork is a moisture resistant natural material. It can resist water and helps prevent mold and mildew growth. In addition, cork has a higher moisture absorption capacity than other insulating materials.
It only requires a vapour barrier in the form of a plastic sheeting when being installed over concrete. Plywood or wood based substrates should not have a vapour barrier used when installing flooring over top. What makes cork such a good insulator? The cellular nature of cork means it is full of air.
One of the significant downsides of cork underlayment is its susceptibility to moisture. If you're installing flooring in areas prone to dampness, such as basements or kitchens, cork might not be the best choice.
If you have a flooding situation (ie: not daily usage), the standing water could possibly re-emulsify the adhesive and thus loosen a few tiles. That's the only foreseeable damage that might be possible by water but this does not typically happen.
Cork underlayments can make on grade and below grade floors feel much warmer with their thermal insulating qualities.
High initial cost. One of the main disadvantages of using cork in construction is its initial cost. Compared with other insulation materials, such as glass wool or expanded polystyrene, cork can be more expensive.
“For minor projects, the absence of a vapor barrier leads to water intrusion, leading to an unstable foundation or a cracked slab.” The American Society for Testing and Materials (ASTM) outlines national standards for underslab vapor barriers.
Because a vapor barrier is a low permeable barrier, it keeps moisture from passing through. This is beneficial to keep moisture away from a dry surface but will trap moisture behind it if installed on a water-damaged concrete wall, causing the wall to fail further.
If you live in a mixed climate – hot and humid with several heating months in the winter, you probably need a vapor retarder. Specifically, if you live in climate zones 4C (marine), 5, 6, 7 and 8. Not sure your climate zone? You can check here.
The #1 Rated Underlayment
ECF is engineered using a proprietary blend of polyethylene and granulated cork. It's the only waterproof underlayment with a built-in 6 mil vapor barrier and works equally well with wood or concrete subfloor installations.
Cork has higher compressive creep due to its inherent resilience. This means that cork does not completely lose its thickness after being compressed and preserves the technical properties where it is applied. By contrast, the cells of several standard foams suffer damage when subjected to the same loads.
It is a floor that requires expansion and contraction. It requires expansion gaps be ADHERED TO without fail – or your floor will surely fail! Failure to follow these guidelines will void your warranty.
While cork is moisture-resistant, it is not moisture-proof. Therefore, a moisture barrier is typically installed with a cork underlayment in damp areas (like basements) or in particularly damp climates.
In general, a standard thickness for foam or cork underlayment ranges between 2mm to 6mm. Thicker underlayment can provide enhanced sound reduction and cushioning.
If you are floating the top floor, then you float the underlay. If you are planning to glue down a hardwood or tile floor, then you glue down the cork underlayment.
Cork is a natural, eco-friendly and soft flooring material, to protect your new cork flooring we require that our floors be sealed in place after installation. This further protects the edges of the cork planks and the locking system to ensure your floors will last for decades.
Cork Back: Our selection of vinyl flooring with a cork back includes a premium natural cork backing built-in for a quieter, warmer, softer floor without the need for additional underlayment.
With an R-value between 3.6 and 4.2 per inch, cork offers one of the best insulation efficiencies available, surpassing many traditional materials. Conclusion: Cork is not just a practical insulation choice; it is a step towards more sustainable living.
A class 33 rating signifies that the cork flooring is suitable for heavy commercial use, making it an excellent choice for homes with dogs. This rating guarantees that the flooring has undergone rigorous testing to ensure it can withstand scratches, impacts, stains, and fading.