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Cork Flooring
Cork flooring has been part of the construction scene for over 100 years, and is making a comeback. It has a very different look and feel from ceramic tiles, hardwood, stone, or carpeting, and worth looking into for your next floor.
Uncorking the Joys of Cork Flooring
Cork isn't just for wine bottles any more! Cork makes a great foor too. Cork has been used in a variety of ways for thousands of years, and flooring has been on the list of cork uses since the late 1800s.
Cork is the outer bark layer of the cork oak tree. Cork consists of a tight web of up to 40 million cells per cubic centimeter, cells that retain gas and give cork its unique character. These trees are found growing in Mediterranean climates like Portugal, Spain, southern France, Italy, and the Maghreb region of north-western Africa. Cork is considered environmentally friendly and sustainable; not only does cork regrow, but also it is readily recycled and biodegradable.
Cork floor qualities include:
* cushiony and comfortable to walk on
* impermeability
* light weight
* insulating
* resilient and elastic; re-expands quickly after compression
* muffles sound
* warm to the touch
* resistant to insects and fires
* non-allergenic and no offgassing
Cork flooring's possible drawbacks are:
* seems fragile
* too soft to make it a good flooring
* flaky
* expensive
Cork flooring's two styles are tiles and planks, and it comes in a range of natural colors. Tiles are glued down and planks are generally floated. Cork tiles are solid cork, about 1/4" think and are usually 12"x12" or 12"x24", with a veneer of decorative cork on top. Cork planks are a sandwich, the layers being cork, a solid center core, cork, and a decorative cork veneer. The solid core is typically made of a fiberboard like HDF (high density fiberboard). The plank dimensions are about 1/2-5/8" thick, and a nominal 1 foot wide by 3 feet long. Tiles are typically glued directly to the subfloor or concrete slab, while planks are clicked or glued together but floating on the subfloor.
The hardness of cork is rarely discussed because it is so different from wood and laminate flooring materials. Its Janka rating is 200, but that doesn't accurately reflect its durability. Its softness seemed like a problem when I dropped a wood sample on it, and the corner of the sample cut into the flooring. I went to show our flooring installer the cut a few months later and couldn't find it; the wound had "healed" without a trace.
Cork has been around for thousands of years. It has been used for floats for fishing nets, stoppers for wine and olive oil bottles, sandals, insulation on boats, and even roofing in northern Africa. As a flooring material, it has been used for over a hundred years in buildings like churches, private homes, courthouses, health clinics, libraries and banks. Cork flooring has recently made a comeback, and it's being used in a wide range of buildings, including restaurants, bars, showrooms, as well as private homes.
From personal experience, I see the cons of cork flooring being in the new approaches to finishing the product. The floating cork floor we put in our house has a finish that streaks when damp mopped, has attained a dull finish, and scratches easily. The finish hasn't kept the cork bits from flaking out of the tile, even in low-traffic areas. I frankly blame that on the finish rather than the concept of cork flooring. I haven't tested this yet, but I wonder if a urethane finish would not only improve the existing finish, but also seal the seams that don't seem to bet as impervious to moisture as advertised.
Cork flooring has the most abundant list of benefits I have ever seen or experienced. It is such a delight to walk on, adding a spring to your step, and it muffles sounds, like carpeting does. Its hard surface keeps allergens from hiding, so cleaning is easy and reduces allergy problems. It is beautiful to look at, partially because of its lack of grain and directional growth. Because of its insulation quality, cork mutes sound transfer between floors, and maintains a reasonable temperature range. If you are striving for a "green home", take note because it qualifies for points under LEED (Leadership in Energy and Environmental Design, a green building rating system developed in the U.S. by the Green Building Council); that's a huge statement of support for the sustainable aspects of cork.
If you are looking for an elegant flooring that is durable, comfortable, easy to maintain, and has a unique look to it, then cork is the right choice for you. When you choose a cork floor, you are choosing to have a floor that will last several lifetimes. What a great choice!
Comments
Hi Mary,
Geez, that's a tough one! Normally, you'd use some sort of floor trim - what are you planning on using around the rest of the room? Perhaps you could use a really decorative floor trim there, so that it looks like you really intentionally wanted it there, rather than as an afterthought. There is beautiful wood trim impressed and carved with all sorts of wonderful themes and you can stain it yourself so that you get a color you want.
Anybody else out there have any thoughts/comments?
The Flooring Lady at August 10, 2008 12:26 PM
We had cork flooring abutting a tile floor-level hearth and framed the tiles with wood. Then the cork was cut to meet the wood "frame" -- without the 1/4" gap. We filled the joint initially with caulk, but that cracked as the floor shifted slightly as people walked across the room. We re-caulked with sanded caulk and have had great success.
If you length is greater than ours you could consider putting a wood trip along the stone -- the wood could be routed to follow the texture and line of the stone. The cork could then abut the wood. If your floor contractor is really good the cork could be cut to flow with the stone line and then put sanded caulk in the joint between the two.
I just hope you don't have Natural Cork's cork flooring.
Mike at August 10, 2008 03:49 PM
We're about to remodel our entire main floor and we'd love to use cork flooring from the kitchen through the dining area and to the edge of the carpeted entrance into the family room. We have opted to forego a formal dining room, and instead we'll have a 5-6 seat kitchen peninsula for casual family dining, and an over-sized rectangular table between the kitchen and family room for entertaining, which can range from a gourmet dinner party to a family gathering with my siblings and their kids.
I've been doing a lot of online research and I'm completely convinced of cork's benefits, especially in durability and self-healing, and it seems that cork does well in high-traffic areas; but what about high-SITTING areas? Can it really bounce back from a 200-lb man sitting at the table for a two-hour wine-tasting dinner? And can that 200-lb man, or even a 60-lb child, slide his chair back with ease, or will he have to lift it up to push back from the table? That may be our most crucial concern -- is cork "user-friendly" or will it frustrate us? Do different sealants affect the "slide-ability?" And maybe all of these questions are moot because I'm making too much of a comparison between cork flooring and the stickiness I equate with wine bottle corks.
If cork doesn't seem like the right surface for us in the dining area, then we won't use it in the kitchen either, because we want one flooring material to flow through the entire area.
I apologize for the length of my post; I really, really want a cork floor, but I really, really want to make the best choice for the way we use our space. Thanks for any insight you can give me.
Jen at August 27, 2008 11:14 PM
Hi Jen, Your ideas sound wonderful! As far as your concerns about high-traffic (or sitting!) areas, it does well in all areas, using the right precautions. * Felt pads under chairs and some furniture is important. * Furniture casters should be placed under heavy furniture -- piano, dresser -- and furniture with hard or pointed "feet" -- antique sewing machine case.
And put several coats of water-based polyurethane -- Diamond Coat Varathane PolyurethaneVarathane Diamond Coat Polyurethane, formulated for floors on top of the cork before baseboards are installed.
And yes, it really can bounce back from a 200-lb man sitting at the table for a two-hour wine-tasting dinner. ;~) Sliding chairs out from sitting at the table works fine, assuming the various precautions (above) have been taken.
Have no fear, Wine corks are not compressed as tightly and don't have protective coatings on them. My sister used to "skate" around the house in her socks, something we can't do as well with our bamboo or oak.
I'd suggest glue-down cork and use Bostik's Best adhesive. It'll be great! Hope the info helps.
The Flooring Lady at August 29, 2008 09:44 PM
Thank you so much for addressing all of my concerns and for your specific recommendations. Cork it is!
Warm regards, Jen
Jen at August 30, 2008 10:23 PM
LOL! Thanks Jen, and you're most welcome. Glad I could help address your concerns!
The Flooring Lady at August 31, 2008 12:15 PM
We recently had cork flooring installed in our kitchen/entrance hallway and had the cork in our basement for about 8 months (still in boxes covered in plastic). I'm concerned that it might not be acclimated because we didn't open the boxes. Should I worry because it was in our house so long before installation. Also, our floor wasn't completely level and there is a noticeable hump near the fridge. Will this eventually crack the planks that aren't level. The planks were placed over the old floor but they removed the old flooring in the higher area. Lastly, the installers took out the cork three times because 1) they cut wires on our security system, 2) didn't realize it extended to the front hallway and 3) worked on reducing the hump a second time. Does anyone know if there's a limit to how many times the planks can be taken apart and reinserted. Does this weaken the joing? I've never posted before so apologize if I'm asking too many questions in one e-mail. Thanks.
Lucy
Lucy at September 6, 2008 10:06 PM
Hi Lucy,
No problem with asking so many questions - that's what this site is here for! I'll try to answer them in order.
The flooring should have been taken out of the boxes to acclimate, or at least had the plastic opened up. You should be ok though, since the floor was laid and taken back up if I'm understanding you correctly.
I think the hump in the floor needs to be addresses. Any new floor you put down needs to be installed on a level floor or else there's probably going to be some sort of issue arise down the road. See if your installer can put down a leveling agent of some kind.
Taking the planks apart a few times, hopefully won't hurt the joints. It's really hard to say since I can't actually see it. Most interlock flooring products are pretty sturdy. I'd check to see if there's any noticeable wear on the interlocking parts. If they're showing wear then I'd insist on the installers having to bear the expense of more new flooring to ensure that this isn't a problem. I'd also insist that the floor be level. This part might cost you more, depending upon if the installers knew that they'd be dealing with the hump. If the installers are the ones that removed the old flooring, then they knew well enough that it'd have to be level before putting down new flooring. If I've confused, let me know. ;~)
The Flooring Lady at September 7, 2008 12:20 PM
Thanks very much for the information. I don't think any joints were damaged although they may not have left the space on the sides to adjust for expansion of the floor. We'll take the 'hump' issue up with our installers. We love the cork and wouldn't go back to anything else in our kitchen.
Lucy
Lucy at September 9, 2008 08:25 PM
Hi Lucy,
Glad you like the cork - it's pretty nice stuff isn't it?!
Take a peek to see if the installers left an expansion gap, if not, that's something else you'll need to take up with them when you call them about the hump issue.
Good luck!
The Flooring Lady at September 9, 2008 09:29 PM
