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Model # DMX 1-Step

Internet # 204494289

100 sq. ft. 44 in. x 27 ft. 6 in. Unique Air Gap Underlayment Prevents Mold and Mildew

This item has been discontinued.
The Home Depot no longer carries this specific product.

$72.00 /roll

  • Can be used with laminate or hardwood flooring
  • 100% Waterproof
  • Sound absorbing and evaporates moisture to eliminate mold




Model # DMX 1-Step

Internet # 204494289

Store SO SKU # 1000289277

Your home and family deserve the best – choose DMX 1-STEP, the new standard in flooring underlayment. DMX 1-STEP space-age contoured foam and unique dimple design provides the ultimate in sound absorption while allowing air to circulate beneath your floors, evaporating trapped moisture and eliminating harmful mold growth. Installation is simple and fast – no tools required. DMX 1-STEP is your best choice for quiet, cozy and comfortable floors. DMX 1-STEP is the only dimpled underlayment that is approved by the North American Floor Association (NALFA).

  • For use with laminate floors and engineered hardwood floors in basements
  • Comes in 100 sq.ft rolls, weighs only 15 lbs/roll
  • Complete Vapor Seal with Vapor Tape
  • Easy to lay down
  • Easy to install; no special tools required
  • Only dimpled underlayment certified by North American Laminate Floor Association
  • Completely waterproof on both sides
  • Heavy duty plastic membrane encapsulated in HDPE foam
  • DMX 1-Step with its unique dimple design, allows air to flow under your floors so that vapor moisture can evaporate quickly, thereby eliminating the build-up of mold and mildew
  • DMX 1-Step does not require a complicated Calcium Chloride test of the concrete slab like foam underlayments
  • DMX does not specify a maximum moisture content for concrete; it is designed to evaporate moisture from concrete surface
  • Most comprehensive warranty in the business
  • Promotes healthy living environments

Info & Guides

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Product thickness (mil) 
Recommended overlap (in.) 
Roll length (ft.) 
Roll width (in.) 
Commercial / Residential 
Commercial / Residential 
Flooring Product Type 
Flooring type(s) used with 
Moisture control included 
Package coverage (sq. ft.) 
Sound absorbing 
Subflooring type 
Warranty / Certifications
Manufacturer Warranty 
50 year warranty on manufacturer defect 


Rated 4.2 out of 5 by 33 reviewers.
Rated 4.0 out of 5.0 by Bsmt I have recently installed the DMX product. It is a saving using compared using other products. So far I am pleased with the product. I have layed down a OSB subfloor, which given a solid floor and increased R factor. I will write a review a year later for an accurate review September 9, 2015
Rated 5.0 out of 5.0 by Great Product! I recently just finished a basement renovation where I used the DMX 1-Step as an underlayment below the finished floor, and I couldn't be happier. The area of the basement that I finished had a minor crack in the foundation that used to leak during severe rain storms, that however has since been professionally fixed without any issues but I still wanted to give myself a layer of insurance in case the repair failed. My initial thought was to use the DRICore product that is so heavily advertised by Home Depot, but the cost was difficult to swallow. After some additional research, I came across the DMX 1-Step product, the reviews were promising, the feel of the product was that of quality, and even with the additional cost of purchasing 5/8 OSB to lay over top, the cost was still half that of DRICore. The installation was a breeze; I used just shy of 200sqft which conveniently was two rolls, so there was very little waste left over. A quick email and a speedy reply from the DMX customer service confirmed that I could use tuck tape for sealing the joints since the DMX vapor tape is not available from Home Depot. Within a day I had the DMX 1-Step laid and the OSB installed even working alone. My wife originally wanted to have carpet in the basement because she was concerned that the floor would be too cool with anything else. I however convinced her that between the DMX 1-Step with its foam backing (something not found on DRICore) and the OSB on top that the floor would be plenty warm with whatever we put down there (for the record I hate carpet). We ended up going with the 15.3mm laminate from Costco which looks really good, the floor has a nice firmness about it's not cold in the slightest. As a matter of fact, the new room in the basement is probably the most comfortable room in the house temperature wise than any room in the house. I am looking forward to seeing the performance this winter when the icy Canadian weather sets in, but I am confident my room and its floor will continue to be warm and dry. I wanted to make two small recommendations: 1. Include in the installation instructions alternatives to the DMX Vapor tape since it seems difficult to find. 2. Include in the installation instructions the detail about using a polyurethane sealant on the screws when securing the OSB to the concrete, I found the answer in the FAQ's but wasn't readily apparent. September 14, 2015
Rated 5.0 out of 5.0 by Excellent Product I just finished installing about 500 sq. ft. of laminate flooring in my basement using DMX 1 step as the underpad. Installing the pad was very straight forward, as you're able to cut it with a pair of scissors, which makes it easy to fit it to the space perfectly. I had some areas that weren't level and the 1 step helped to accommodate for that when I was laying the flooring down. It's soft underfoot and there's no tapping noise as you walk on the floor, due to the layer of foam on the underside. The problem I had was that HD doesn't sell the Vapor Tape that is shown in the 1 step videos, but after emailing the company, they shipped me some of their tape for free. Excellent customer service, as they got back to me the same day I emailed them. So far I'm happy with the product and will use it in the future. July 13, 2015
Rated 5.0 out of 5.0 by Warm and Quiet Room These rolls are very easy to work with, I cut them with kitchen scissors only, and taped is quiet and feels warm to the feet now. No smell at all in my room and it was easy to lay the laminate flooring on top of it. I like that it cushions the floor and makes it quiet to walk on. Great product I would highly recommend. March 28, 2015
Rated 1.0 out of 5.0 by Poor product Installed this product a year ago. This winter my whole house stinks with bad smell. Tried everything and finally figured out step is causing the whole issue. Should have never installed it. March 19, 2015
Rated 5.0 out of 5.0 by Easy to use, Really great product Finished a basement bedroom floor and chose the DMX 1-Step because it seemed like a great design to prevent moisture damage to floors and make the room quiet and warm feeling. Rolled it out on the level concrete floor, cut it at the walls, taped it as instructed, laid the laminate over top. Very fast, very easy process. Walking on floating laminate is quiet, soft and comfortable. The DMX 1-Step underlayment makes the room seem warmer too. Great product. February 8, 2015
Rated 2.0 out of 5.0 by Inconsistent length We bought 6 rolls of DMX-Step-1 for my basement renovation. The installation is pretty easy; however we find that there are length differences between the darker blue and lighter blue versions. These two versions have the same price, and they are located in the same lot, with identical product label. However the dark blue version is about a feet shorter. This causes us to miscalculate the number of rolls we need. We have to pack up the rolls again and drive to Home Depot to exchange for the light blue version, which is a hassle. The product itself might be ok, but there should be clearer indications on why there are two lengths. June 1, 2014
Rated 5.0 out of 5.0 by DMX 1-Step Underlayment DMX 1-Step is an excellent underlayment! We wanted to add useable living space to our existing home by renovating the basement. We were concerned about moisture getting in as well as the comfort and warmth of a laminate in the basement. 1-Step has made the floors and room warm and cozy, and is super comfortable to walk on! Our sons friend actually said "this floor is so comfortable, I could walk on it all day"... We also found 1-Step to be considerably less expensive than most other underlayments, (which helped keep us within budget), and the installation process was quick and easy! :) Definitely a top recommendation! :) February 20, 2013
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