The best cork underlayment depends on flooring type, thickness needs, and project size. QEP’s 12 mm sheets suit buyers seeking a thicker layer beneath several flooring types, while ROBERTS offers thinner 6 mm sheets for broad coverage. Eco Cork Foam combines cork and foam with a vapor barrier, and Panelee provides a large roll for cut-to-size projects. Hygloss is a small craft roll, not a stated flooring underlayment, so it is better suited to light DIY uses.
| Product | Best for | Format |
|---|---|---|
| QEP Natural Cork | Thicker sheet underlayment | 12 mm sheets |
| ROBERTS Natural Cork | Large-area sheet coverage | 6 mm sheets |
| Eco Cork Foam | Flooring projects needing a vapor barrier | 250 sq. ft. roll |
| Panelee Cork Roll | Cut-to-size DIY projects | 3 mm roll |
| Hygloss Cork Roll | Small craft and insulation projects | 2 mm roll |
QEP 12 mm Natural Cork Sheets
QEP’s 12 mm sheets are the thickest listed natural cork option. Each sheet measures 2 feet by 3 feet, and the pack contains 25 sheets. The product is specified for ceramic tile, stone, marble, glued wood flooring, and floating floor systems.
Best for: Buyers who need thicker sheet-format cork for an eligible flooring installation. QEP also states that the material acts as a crack isolation membrane against stress cracks up to 1/8 inch and has an R-value of 0.31 to help reduce thermal transmission.
Limitation: The product is sold as individual sheets, so buyers planning a large area should calculate coverage and account for seams before purchasing.
ROBERTS 6 mm Natural Cork Sheets
ROBERTS offers 6 mm natural cork sheets measuring 2 feet by 3 feet, with 50 sheets and 300 square feet stated in the product name. Listed uses include tile, porcelain, stone, laminate, and engineered click wood floors.
Best for: Buyers who want a thinner sheet product with large stated coverage. Like QEP, it is described as a crack isolation membrane that resists transfer of stress cracks up to 1/8 inch. It can also reduce thermal transmission and help floor-heating systems work more effectively.
Limitation: At 6 mm, it is half the thickness of the QEP option. Confirm the required underlayment thickness and installation method for your chosen flooring.
Eco Cork Foam Floor Underlayment
Eco Cork Foam is a 250-square-foot roll described for vinyl plank, LVP, laminate, and other flooring planks. Its features include a built-in 6 mil vapor barrier, self-sealing tape, and a 3-inch overlap for installation.
Best for: Buyers seeking a roll-format underlayment with a vapor barrier and sound-insulation features. The product lists sound ratings of IIC 76, HIIC 92, Delta IIC 25, and STC 67 for specified flooring systems.
Limitation: Sound performance figures are product claims tied to flooring assemblies. Check the installation requirements for your floor rather than assuming the same results in every room.
Panelee 3 mm Cork Roll
Panelee’s natural cork roll measures 48 inches by 600 inches and is 3 mm thick, covering 200 square feet according to the product name. The roll can be cut to size and is described for DIY uses such as shelf liners, drawer liners, and wall projects.
Best for: Buyers who need a large, cuttable cork sheet for flexible home or office projects. The listed features include noise absorption, resistance to deformation, and reduced heat transfer.
Limitation: The product details do not specify flooring-system approvals or an integrated vapor barrier. Check whether this DIY roll is suitable for your planned floor assembly before installing it under flooring.
Hygloss 2 mm Cork Roll
Hygloss is a 2 mm cork roll measuring 12 by 24 inches. It is designed to be cut into shapes for projects such as coasters, furniture pads, and science-experiment insulation. The product also describes it as useful for soundproofing.
Best for: Small DIY tasks where a compact piece of cork is more practical than a flooring-size roll or pack of sheets.
Limitation: The listing says it is not thick enough for push pins, and it does not specify use as flooring underlayment. Choose a flooring-specific product for an installation beneath finished floors.
Buying Guide: How To Choose Cork Underlayment
Which thickness should you choose?
Compare the thickness of the underlayment with the flooring manufacturer’s installation instructions. The listed options range from 2 mm to 12 mm. A thicker product is not automatically suitable for every floor; the required thickness and attachment method depend on the flooring system and subfloor.
Sheets or roll: Which format is better?
Sheets can be easier to handle in smaller sections and are the format used by QEP and ROBERTS. Rolls cover broad areas with fewer separate pieces and are available from Eco Cork Foam and Panelee. Compare total coverage, dimensions, seams, and how the product is meant to be installed.
Do you need a vapor barrier?
Eco Cork Foam lists a built-in 6 mil vapor barrier. The other cork products described here do not list an integrated barrier in their supplied features. Follow flooring and subfloor instructions to determine whether a vapor barrier is needed and where it should be placed.
What should you check before installation?
- Confirm the underlayment is listed for your flooring type.
- Check whether the flooring installation calls for an attached, floating, or separately installed underlayment.
- Measure the area and compare it with stated product coverage.
- Review sound, thermal, and crack-isolation claims in the context of the full floor assembly.
- Do not assume a craft cork roll is approved for flooring simply because it is made of cork.
Frequently Asked Questions
What is cork underlayment used for?
Cork underlayment is placed beneath certain flooring systems to provide a supporting layer. Product features may include sound or thermal insulation and crack isolation, but suitability depends on the flooring and installation requirements.
Can cork underlayment go under tile?
Some products in this selection list tile as an intended use. QEP specifies ceramic tile, stone, and marble; ROBERTS lists tile, porcelain, and stone. Confirm the complete installation method before buying.
Is cork underlayment waterproof?
The listed natural cork sheets and Panelee roll are not described as waterproof. Eco Cork Foam specifically lists a built-in vapor barrier, but buyers should verify whether that feature meets their floor’s moisture-control requirements.
How much underlayment should I buy?
Measure the floor area and compare it with the product’s stated coverage. Account for the layout, cuts, and seams, and follow the flooring manufacturer’s guidance for installation.
Can I use a thin cork roll under laminate flooring?
Do not assume a thin craft or DIY cork roll is suitable under laminate. Choose an underlayment specifically listed for the flooring system and follow the laminate manufacturer’s requirements.