6mm (1/4") Cork Underlayment

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Part Number: 6-U6MM-BOX-US

FREE SHIPPING available. 62¢ per sq ft or less.
MADE IN EUROPE. No Formaldehyde

Total Surface Area Per Box: 96 sq. ft.
Sheet Size: 6 sq. ft. (2' x 3')
Sheet Thickness: 1/4" (6mm)
Sound Rating: IIC 51, STC 54 on 6 inch concrete slab with no drop ceiling.
R-Value: .82

Sound Ratings: IIC and STC

WIDGETCO® 6mm (1/4") Cork Underlayment Sheets are made from natural cork. Cork Underlayment is a natural sound insulator and will work with both wood floors and tiles to help reduce walking noise and act as a thermal insulator. Cork natural properties resist mold and mildew. Each sheet is 6 sq. ft. (6mm x 2' x 3'). Each box contains 16 sheets or 96 sq. ft. Cork Underlayment Sheets install quickly and easily and do not curl up as can occur on underlayment rolls.

Related Products

3mm (1/8") Cork Underlayment
12mm (1/2") Cork Underlayment

Cork underlayment on cement floor

We are SO glad we found this product to put under the floating "SmartCore" vinyl floor we are installing on cement. Although, this floor doesn't require an underlayment, the room is a cold room in the winter with a hard cement floor and we wanted the extra insulation and softness. Your cork underlayment is PERFECT, and SO easy to use. It came beautifully packaged, is clean (no dust) and is very easy to use. This is a great product that insulates, softens, and helps quiet a room. Exactly what we wanted. We are very happy!!! and in perfect condition.

Jinny H., Boyne City, MI - 3/18/2015


Better than rolls to install

Dan B, New Prague, MN - 3/8/2015

Excellent product

Fast order processing and shipping....would buy from again

Gene M, Wenatchee, WA - 3/4/2015

Quality soundproofing

We used 1/4"cork sheets as underlayment over our tongue and groove flooring in our timberframe, covered it with Advantech and installed hardwood flooring over it. Our home is so much quieter now. Great product, easy to install. Superfast delivery.

Harry P, Pennsylvania - 3/4/2015

Cork is the best!

Absolutely the best under flooring for any type of hardwood floor. The plastic stuff is no good. Super fast delivery and very competitively priced product.

John K., Tahoe, CA - 2/1/2015

Repeat buyer

Great product - great service - great results. Thank you.

Jerry K, Chesterfield, MO - 12/12/2014


Came really fast, really easy to install, great quality.

Boris G, Fairfax, VA - 12/11/2014

Cork Underlayment

I'm using the 6mm cork as an underlayment on my laminate flooring, works great. I ordered it on Monday and it arrived on Tuesday with free shipping, I wonder how fast it would have come if I had paid for shipping? Yes I would use WIDGETCO again. Thanks.

Robert H., Texas - 11/17/2014


So much better than a roll.

Dirk D., Loomis, CA - 10/14/2014

Great Product

Delivered on time and was not damaged. Easy install squares easier to install then roll type. Would order from WIDGETCO again.

Stephen, Virginia - 10/11/2014

Wonderful experience from ordering to installation

I ordered 1056 sq ft as underlayment for my basement floor and couldn't be happier with the entire experience. The product arrived quick with no damage to the boxes or product. Installation was a breeze and I can't believe the difference it makes as a thermal break for the porcelain tile on a concrete sub floor. Next house I build will have this installed everywhere! Thanks!

Amitabh S., Michigan - 9/30/2014

Great Product

I am using the underlayment to raise up the subfloor in guest bedroom (after removing carpet) to match surrounding hallway floor. I am using Thermosoft Radiant Heat mats and Bamboo floating floor. This product is dense and hard enough to act like luan under the floor while also flexible enough to accommodate some unevenness in the subfloor. Way better thermal insulator than luan too. On-time shipment and boxes arrived in good condition.

Jim K., Williamsburg, VA - 9/16/2014

Great product, easy to install

I purchased this underlayment for a dance/workout room, with laminate plank flooring over it. I am very pleased with the feel of the cork underneath the laminate; it adds just a little bit of spring underfoot and should help muffle sound. This was my very first flooring project, and I couldn't have asked for an easier installation process. The sheets lie perfectly flat, and are easy to cut with a utility knife. I will absolutely use this underlayment for future projects! Shipping was very prompt and the quality is excellent, no crumbling or damaged sheets in either of my two boxes.

Regina H., Woburn, MA - 8/4/2014

Underlayment - Sound and Comfort control

This was purchased for an attic conversion now done. The price was great, delivery was extremely timely, and the contractor found it easy to use between the sub-floor and the hardwood flooring. It helps cushion the fit and eliminates the perceived footfall heard on the first floor (the presence of teenagers is another matter -- but that's muffled.). Really met my requirements -- and I was able to order only what I needed.

John S., Mobile, AL - 7/25/2014

Cork Underlayment

The 6mm cork underlayment is wonderful! It really makes for an excellent foundation and I love the firm but soft feel it gives to the vinyl plank flooring installed over it. Lightning fast shipping, awesome customer service, great product. What more could you ask for? Highly recommend!

Kelly P., Memphis, TN - 7/12/2014

Great Product, Great Price, Great Free Shipping!

My complete order arrived exactly on time, and it was just what I'd ordered! I shopped a long time online looking for this product. It is of great quality as well as the best price I found. 2x3 sheets of cork are easy to handle and cuts easily with a sharp blade.

KG, Fall Creek, WI - 6/29/2014

Free Shipping was Great

My order (1/4 in cork sheets) arrived within a few days after placing the order. Free shipping was great. My project is not at the stage of installing the cork, but I think it will be what I need under my heated floor system.

Mickey S., Edenton, NC - 6/12/2014

Great price, custom service and product

Free shipping makes all even better.

L. L, Cupertino, CA - 6/10/2014

Exactly what I wanted and needed

My cork underlayment arrived within two days of my ordering. My daughter is a crafter and this product is perfect for cork boards and custom coasters and so on. A great find!

Drew H., Houston, TX - 5/28/2014

Great material, price, shipping, etc

I received the 6mm Cork Underlayment VERY quickly and with free shipping! It is now completely installed in 1 of my rooms and I am very pleased with the results. Now only 4 more rooms to go so I will definitely be ordering from the site multiple times.

Brendt M, Cumming, GA - 4/24/2014

Great Price & Prompt Shipment!!!

I was very pleased with my overall experience. My 6mm Cork Underlayment arrived as scheduled and install was easy due to the pre-cut sheets. I would recommend WIDGETCO for all your flooring needs. T & N Realty LLC, South Carolina

T & N Realty LLC, South Carolina - 4/23/2014

Excellent product and price!!

Product arrived very fast and packaged well. I used as an underlayment in my basement floor. Glued down with urethane glue and tiled over with a thinset. I would highly recommend and will be buying more in the future.

Tom J., New Jersey - 4/14/2014

Excellent product, Fast shipment

Used as a underlayment for floating wood for on concrete slab. very easy to work with.

Mark H, Tucson, AZ - 4/3/2014

Great Cork Boards

Had to build 9 display boards, various sizes, for a county office with lots of public visitors. Worked great! Material was clean, good quality, and cut properly.

Jerome M, Georgetown, TX - 4/1/2014

Great price even better product

I used this as underlayment under a floating bamboo floor on our 2nd floor and couldn't ask for a better product! Great sound barrier and insulator! Would recommend it. Going to order more for the rest of our home remodel.

K. WIlliams, Long Beach, CA - 3/18/2014

Great product

We used this as underlayment for a 3/8" thick floating bamboo floor being laid on a concrete slab. It is wonderful. It lays completely flat, we taped the edges together with ordinary package tape. After the floor was installed we were additionally impressed because the cork served as a great sound muffler as well as an insulator.

Ruth J., Washington State - 3/15/2014

Excellent Product - Fast shipping

Item arrived as advertised and shipping was free. Excellent transaction.

Tom M., Lawrenceville, GA - 2/3/2014

Excellento Mamucho !!! :)

Good stuff , excellent service ! Thank you !!!

Aleksandr G., Denver, CO - 12/24/2013


Order arrived in perfect condition, and the quality was far superior to both rolls and sheets I found at retail (which were far more brittle). Just laid them today and it went very smoothly.

Erin O., Long Beach, CA - 12/18/2013

no issues at all

Called the company direct to verify delivery date. Fedex delivered first thing in the morning on the date promised. Excellent transaction.

Michael Z, ft Lauderdale - 11/21/2013


Just received both boxes, within 5 days. Just in time for a 3 day weekend project, master bath floor remodel. Old flooring stripped out and cork is down, easiest underlayment to work with. Ready to lay down vinyl tomorrow. Thanks for great product, great price and free shipping!

Kevin M, Snoqualmie Valley WA - 11/9/2013

Superfast delivery

Using sheets turned out to much better than using rolls! Installation was much easier. Delivery was superfast and the quality of the product was great.

Dirk P., Nevada - 11/6/2013

Great product

Quick shipment as promised and prompt as described. Thank you.

Nima M., Seattle, WA - 11/3/2013


Ordered three boxes of 1/4 inch sheets for an underlayment of laminate flooring. Shipment arrived in a matter of 4 or 5 days in good order and was used with good success. This cork seems to be of very good quality and lays flat. Am well pleased with this company and would buy from them again.

William B, Hazel Green, AL - 10/23/2013

Love this product

I love this product and I couldn’t be happier with the service – from pricing to ordering to follow-up communiqués, to ship and arrive time…so prompt, so courteous and such good use! Will not hesitate to order more, as well as telling others about this company and this product. Thank you!

Lynn A., Colorado - 10/11/2013

Fast shipment

These shipped so fast! The cork sheets are great.

Susan O., Palmer, TX - 10/4/2013

Best underlayment

Just completed installation of 400 plus sq. ft. solid hardwood with WidgetCo cork sheets as underlayment. Very impressed with reduced sound transfer to lower rooms and that almost all of the annoying floor squeaks have been abated. This product is so much easier to use than fumbling with rolls of a product that wont lay flat. I could not be any more pleased. I have already recommended this underlayment to several friends who are contemplating new floring projects in their homes.

Ken M., Pittsburgh, PA - 9/14/2013

Great product, great price, FAST shipping

We are redoing the floor in our downstairs area, a concrete floor, and this cork underlayment is a quality product at the best price we could find. Shipping was incredibly fast, and we are totally satisfied. Highly recommend both WidgetCo and the cork underlayment.

Deb S., Hudson, Wi - 8/19/2013

Good stuff and fast shipping

Very fast shipping, good pricing and item looks good as well. Would order again if need be.

Jari R, Escondido, CA - 8/13/2013

Looks good to me.

It arrived in 10 boxes and seems undamaged. Good product!

Gerard P., Washington, PA - 8/4/2013

Excellent Product and Price

Excellent product, best pricing and delivered very fast. These 1/4" cork sheets are a perfect underlayment for my bamboo floor. WidgetCo is a great company with excellent service. Thank you very much for your business.

Albert B., Minneapolis, MN - 4/28/2013

Great product.

I am replacing all carpets with hardwood flooring. This product helps make my project a resounding success. Highly recommend this company and product.

Jerry K, Chesterfield, MO - 4/17/2013

Best price & lightning fast shipping!!

Great product and quality!! The cork arrived before the payment was taken out of my account!! We installed the 2x3 sheets on the walls in our gameroom...was so easy and loved the look so much we are now covering our bedroom walls!!

Lillie A., Beach City, TX - 4/15/2013

Inexpensive and fast delivery

When compared with Lowes, these 1/4" underlayment sheets were cheaper and were delivered faster than what is available at Lowes. Sheets are easier to install than rolled corked. Great for sound insulation for my condo as I have decided to replaced my old vinyl flooring with porcelain tiles.

Jon P., San Francisco, CA - 3/29/2013


This is a great product. Fast and free shipping! I am using this for a finished floor in my loft upstairs. Soft and warm. Easy to install and eco friendly and healthy for my family.

Julie R, USA - 3/14/2013

Good product, price and delivery

Very satisfied with the whole process and the product.

Dave K, Washington - 3/2/2013

Very Nice

I used this cork as underlayment for bamboo - it has come out very nice. The order process and shipping was a breeze. I highly recommend WidgetCo and this cork.

Shiva S, Atlanta, GA - 2/19/2013

1/4" Cork Underlayment

Absolutely perfect! This will make awesome bulletin boards for the grandkids.

K.C., Hughson, CA - 2/17/2013

1/4" Cork Underlayment

I have bought many times from WidgetCo. EVERYTIME they do an excellent job. Every company should be so quick, accurate & customer friendly. If thats not enough their pricing is excellent to boot.

Sean A, South Jersey - 2/12/2013

1/4" cork underlayment

The price was amazing and the shipment was very quick. I am one happy customer.

George, Flemington , NJ - 2/7/2013

1/4" cork underlayment

Excellent quality, provides good sound insulation. Much better than cork roll underlayment. Highly recommended. Very fast shipping also.

Harry S, Pennsylvania - 1/30/2013

Love this company

Great products, amazing service - thanks/

Mike Grasso, Pittsburgh PA - 1/24/2013

Happy Customer

What a novel idea; great service, prompt delivery and an outstanding product. Will you please teach the rest of the business world your secrets. Thanks, Steve.

Steve S., Carlsbad, CA - 12/26/2012

Great Price, Great Product

Awesome vendor, great product. I'll definitely buy again for my next flooring project.

Todd W., Manassas, VA - 11/15/2012

Great In Every Way

Fastest shipping ever! My underlayment arrived in about two days. The sheets were well packed and just as expected. WidgetCo kept me updated with emails at every step. Great company, great price, and a great product.

Rhonda G, Atlanta, GA - 11/13/2012

Best price. Excellent packing, Fast.

Best price anywhere for this product. Excellent packing. Fast delivery. Great communication! Highly recommended vendor.

Tom P., Webster NY - 11/3/2012


Quality product, excellent service and quick delivery. Thank you WidgetCo!

Ignacio G., Gaithersburg, MD - 10/22/2012

Great Item

Needed a box to finish a project and the product was great. Fast shipping, excellent product, good price, what else can you ask for?

Billy T, West Point, MS - 10/18/2012


From ease of ordering to quality of product everything was fantastic. The product was far superior to anything I could find at the big box home improvement stores and a third the price of all other similar products I could find, locally or online.

Robert L., Sandy, UT - 9/30/2012

Great product

We received pur order of 10 boxes very quickly. They even delivered on Saturday. Every box was in good shape. Already started installing the cork underlayment under a hardwood floor in a bedroom. The rectangular sheets lie flat and cut easily. There was no curling or splits at the edges, unlike rolled cork, which we used prior to finding WidgetCo. It will definitely speed up our project.

Harry S, Poconos, PA - 9/5/2012


This product is fantastic! We have spent two years with a major remodel of our home and used the cork underlayment throughout the house for the tile and the hard wood flooring! As we are on a concrete slab, this has added not only a moisture barrier but a cushioning and a barrier to insulate, keeping the warmth in! Again, thank you for your wonderful product and great service!

Andy C., California - 7/9/2012


Excellent product, best pricing and delivered very quickly. Will be purchasing more.

TJ R, Atlanta - 7/4/2012

Thank You So Much!

Dear WidgetCo., Thank you so much for the best price and superfast delivery!

Beverly H., Ridge, NY - 6/14/2012


"My order came faster than anything I've ordered online! I haven't been this pleased with an online order - ever! "
Betty J.

"If everybody had customer service like this, we’d all be better off today!"
Karl B.

"This is a world where such wonderful customer service is getting very, very rare. Yours is greatly appreciated."
Irv S.

"Great job getting my order to us so fast."
Fred W.

"It's not too often that you find a company that conducts business with the level of customer service that you provide. I hope you have a great day, thank you!"
Hely R.

"We have never had such fast efficient service AND we live in Mexico where it usually takes much much longer."
Maureen M.

"We are very happy with your product! We also are happy with how you do business!"
Anthony P.

"Received with dazzling speed! Absolutely terrific!"
Jeffrey F.

"Many thanks for efficient, well packaged delivery of my order to the UK."
Peter L.