Once you have done this, you need to rely on their expertise to help guide the decision. The company's who manufacture these new vapor barriers make them in 10 mil and 15 mil thicknesses with different widths and lengths. If slab degradation, then in what form? We are wanting to replace the flooring. Best regards, Hi Jason. As far as I am concerned, mold is an issue no matter what. This being said, I have a hard time believing that the concrete was dry enough for flooring installation. Unfortunately contractors or owners often discover that no vapor barrier was used or that the vapor barrier has probably been torn or damaged, possibly when the concrete was poured. I doubt the slab has a vapor barrier. It will have a laminate floor when done. the Spillmaster stuff was supposed to prevent mold from coming through yet it seem mold formed right at the seem of the foam and plastic/vapor barrier which is on the living space side of the upper ( the side i walk on) All answers are appreciated. I have a home in West Florida with a detached garage that is a slab on grade. Putting this down prior to the tile may help alleviate some, if not all, of the issues. Thanks! This is why a vapor barrier under concrete is essential. Teaching • Learning • Achieving •, Poly would be better called a vapor retarder as it just, The best vapor barriers for concrete floors and slabs are a new generation of Poly made from. Do I run the vapor barrier that’s on top of the mat slab over the new foundation as well? Dan Marks Instead of going back and forth on this (I have questions), why don’t you just give me a call: Monday-Friday 7:30am-4:00pm at 800-634-9961 X235. Based on the fact that two sides will be open and that the finished floor will be the actual concrete, I see no real reason to have the vapor retarder. Paint just seems to peel and pop up. I’m assuming whoever laid the concrete slab did not put a vapor barrier below it . I would contact https://www.stegoindustries.com/ And see if they have a viable option for you. He did and the moisture level was at 100%. I'll get to that in a minute. we had a plumber come out and fix it by replacing the piping that had a hole in it. Your email address will not be published. My fear would be more about the floor being ruined than mold. with Self-Adhesive Edge for Installation with WarmFilm Ditra-Heat-Duo 3 ft. 2-5/8 in. It is used for slabs that suffered moisture problems due to lack of moisture prevention means or failure of moisture prevention system. I’m installing 5mm LVP (w/o padding) on the concrete floor in the basement. They look similar to carpet padding, but they have a … I asked him to get his moisture reader and just measure it. I think if you were to read my other articles and/or view my video’s you would see my overarching opinion that concrete loves water, but it’s the flooring finishes that we use that don’t. Usually, if you aren’t looking at putting a finish on the concrete, you have no issues with the moisture in the concrete. thank you for your response. Or are there problems with both of these methods? The adhesive was supposed to be a “2 in 1” adhesive/vapor barrier product. I don’t see much issue with slab degradation. What can I paint onto the subfloor to eliminate moisture coming through when it rains? If Pergo is the finished product, I would start by calling their technical hotline (after quantifying the moisture levels) and asking them for recommendations or guidance. We installed laminate flooring about 6 years ago and now have a terrible odor. I’m going to start building, and vapor barrier doesn’t come in sheets as wide as the house, so I’m getting the idea that the sections/layers should be sealed together with some sort of exterior silicone stuff? I want to pull up the carpet and padding in the main areas of my home. Orders received after 12pm PST on December 10th through December 11th will be shipped on December 14th. There’s a lot to cover, so if you have any questions, contact me! Block foundation, built 1952. basement window will corrected before flooring installation FYI lol. You can measure the temperature and relative humidity of the air in the cabin, then plug those numbers into this calculator: http://www.dpcalc.org/. • Vapor semi-impermeable: 1.0 perms or less and greater than 0.1 perm that’s the reason of putting the sheet? i recently started a renovation and i decided i wanted to pour cement over the whole crawl space. If you’ve ever had a problem with a basement floor (or any concrete floor), you know the kind of damage that too much moisture can cause. If parts of the slab got cold enough to reach its dew point, I suppose condensation could form, but to have it be spotty is indeed strange. Thanks for the comment/question. And is a vapor barrier under the new to-be-poured concrete needed? Concrete Floor Moisture Barrier Problems? Thanks for the questions. Vapor barriers are a way to keep moisture from getting into the concrete. Concrete and concrete block are common, but porous foundation materials. Hi Jason, our garage is approximately 12 years old. Good luck! ?….all the tile installers i talk to about this seem to have no knowledge of this kind of possible vapor interference with adhering thinset….i want to do this right and feel confident that the tile floor will last for many years! The American Concrete Institute states that a vapor retarder should be placed directly under a concrete slab on grade if now, or in the future, a low permeable membrane (floor finish) will be installed upon the slab. Eight months later the floor is buckling. Good luck. I’m thinking maybe I need to insulate the cooler floor(top of slab) to possibly help so it would keep the cold from permeating down through the slab (basically raising due point), or some how or another insulate the exterior of slab that is exposed to the crawlspace to keep that moisture from wanting to stick to the cool wall of slab. There are industry-accepted test methods for determining the moisture condition of the slab, and I suggest you look into this before doing anything. My uncle had the cooler installed appx 10 to 15 years ago. has a high performance 15 mil vapor barrier for installation under concrete floors and slabs that will retard moisture migration and radon from escaping through the surface of the concrete floor. The contractor I hired to form and pour the slab for my free standing garage has poked holes in plastic I had him put down as a vapor barrier. The crawlspace is probably only 1.5′, so it’s kind of tough to manuever around, but it is possible. x 3/8 in. The downstairs had 12 x 12 tile, I replaced with 30 x 30 porcelain tile in November. 2. I think he is just handing me BS and hiding behind the “moisture level” issue. The rooms are separated by a marble floor installed in the main parts of the house. Thanks for the question. Any suggestions? Moisture Barrier 40 ft. x 2.5 ft. x 6 mil (.006 in.) We have a very long run of approximately 34 ft. If this is the case, research some of the various moisture mitigation products available that are topically applied to the slab. Now that being said, people re-purpose all the time. Thanks for the comment. There are various opinions, but this makes sense to me. I have heard of people doing this, but I would always check local building codes to confirm acceptability. Does anyone know what that is? I would say you are right on track with the thought of mold growth. We called in a leak detection co and they preformed all their tests and there were no leaks.Then we called the flooring people in and they pulled up the wood where the black was showing and there was moisture between the moisture barrier that was put down and the wood.the wood was showing mildew and the moisture was between the barrier and the wood. now i am trying to figure out what can i do to have this crawl space safe and not humid I don’t have any access to any drains there so i can’t put a dehumidifier there . Return from Best concrete floor vapor barrier to Concrete vapor barrier. It will have a concrete slab, a sheet metal roof, and two concrete block walls. Vapor barriers are used because while fresh concrete is poured wet, it’s not supposed to stay that way. Granted i did let the carpet sit for about a week before pulling it up entirely. Gloria Broming. This type of barrier is especially prevalent in areas with wet, swampy ground. Based on your situation, it may be best to ensure you have proper ventilation and airflow in the air space. I’m just wondering because they are saying it can be used as storage the open space of ways to reinforce the barrier to make sure that the plastic is not punctured. I would like to put down an impermeable class 1 vapor barrier on top of the slab before I put down any flooring. Vapor barriers have varying degrees of permeability, expressed in perms. Capillary action can be stopped by installing something called a capillary break, a layer of crushed rock that goes between the subgrade and the slab. The contractor said he could rip up all the laminate and put down a vapor barrier, but he said it would be a waste since the laminate floor would act as the barrier. We have a home in Houston that has been flooded with the hurricane, and all flooring other than the travertine tile has been removed. x 2 ft. 7-3/8 in. I'll show you my method for pouring a garage floor in 17 minutes. Regular polyethylene plastic is made from recycled materials and low Install a plastic vapor barrier: If your concrete passes the moisture test, then plastic sheeting at least 6 mils thick will prevent moisture from getting into your laminate flooring. This site uses Akismet to reduce spam. However, they can’t stop water in vapor form from reaching and entering a concrete slab. It is an old building built in the early 70’s which purchased 4 years It had mold remediation done but we do not have contact with the previous owner to query where this work was done. One word: adhesives. The soil is very sandy and the slab will be subject to occasional flooding both in summer and winter conditions. Click here to read our PRIVACY POLICY and our DISCLAIMER NOTICE. Thanks for the question. It will eventually be turned into a music room with climate control, flooring, etc.. Pls tell me what are my options? The installer says that my moisture level is too high, and doesn’t want to be responsible if it ever warps. I would test via a Calcium Chloride test or a relative humidity test like the Rapid RH test. The house is on a concrete slab. Good luck. I think there is now trapped rainwater in between my poly and styrofoam. My dad and husband just poured two footings in our basement and forgot to put down the 6mil poly specified by the engineer before pouring the concrete. While a water vapor permeance of less than 0.3 perms is recommended, a higher permeance rate is usually considered acceptable for residential use. To take it one step further, ASTM E 1745 Class A vapor barriers (products with less than 0.01 perms) are the best approach to protecting your concrete slab and components, moisture sensitive floor and IAQ from moisture sources below. Thanks for the question. It has been there almost for a week, and it is not helping hardly any, of course we have had some high humidity since I’ve installed it. So we have to balance the overall system makeup to ensure all parts perform well together. Should I be concerned about humidity build up between the vapour barrier and the concrete? I noticed what the installer was doing and I questioned him but did not push through asking him to fix the spreading of the vapor barrier before pouting the cement which I regret. This question is usually linked to the type of floor finish being installed, so, what type of finish are you installing on the surface of the concrete i.e. I would expect that you can successfully install carpet in this situation (or any other flooring product), but it is going to require that you find someone knowledgeable to work with that acknowledges the challenges you face in this application. As I looked over to the right of me, I noticed a large crown in the middle of the floor(about 16′ wide). How to install a vapor barrier. He feels we need to consult with a foundation expert. Also is 1/2 x 1/2 x 1/2 trowel best for this size of tile? AND finally does it matter what we choose if we place a high performing barrier? What type of moisture barrier would you recommend? Glued Floor Barriers. So I do not know if there was a moisture barrier down on the slab, Now 4 years after the carpet was installed l found 3 wet spots about 6″ diameter which have recently appeared on the carpet which I tested with a moisture sensor at over 35% ( thats the highest the meter reads) I suspect that the slab may have cracked and and any moisture barrier may have been compromised. Moisture Vapor Barriers Mitigate moisture in flooring applications. I’m building my own house and I’m at the stage that my main floor has already been poly’ed, styrofoam installed, rebar done and finishing the loop for my radiant heating. If they do, moisture will get in and that’s what you’re trying to keep out. If we do this, is there a specific location that is best? Any help would be greatly appreciated. I would always have to defer back to your local building code on this. We put down laminate flooring that is now warped. Pouring concrete floors fast takes certain steps and planning for a successful pour. Some of these challenges include potential hydrostatic pressure (basement below water table) and the lack of a vapor retarder below the slab due to the age of the house. Here are some of the company's and their products. Please advise. Could this odor be caused from the moisture coming from the cement and trapped in the foam underlayment? Concrete slabs on grade and basement slabs are weak and vulnerable to the detrimental effect of moisture which may lead to various problems. Most vapor barriers are created using polyethylene or polyolefin sheets that are strong enough (at least 10 mils thick) to tolerate the kind of heavy construction activity that goes on over concrete subfloors. Top of that implies, set up a protective barrier to hardwood floors it helps reduce mold condensation. Is excellent! W.R pulling it up in the dining room coloured crystals growing through seams outdoor that! 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