damp under carpet concrete floor

Ideally you need to take it up and redo the entire floor, alternatively as was mentioned, paint it with a waterproof material. We have a wet cellar (high water table) which is designed to flood (complete with drainage channel sunk into the floor). To comment on this thread you need to create a Mumsnet account. I’ve had blocked up ventilation grills in the past that have caused problems. Virtually all adhesives used in the industry today do not support mold growth. It felt damp and sticky so we lifted it and all underneath, the underlay (orangey brown waffley rubber type stuff) was soaked, dark brown and sticky. Use Option A to keep your floor dry if you have damp floors in your basement. the previous owner had tried to carpet over them, with obvious catastrophic results....That said, the weather has been SO dry that I would guess that either a water main or a sewer is leaking for the floor to be that wet a the moment. Have you got a crawl space? Installing a damp proof underlay for concrete floors Starting at one side of the room, unroll the membrane and cut to fit the room as one would a carpet. This barrier is intended to stop moisture passing from one to the other. I removed old carpet in my bedroom and the rubber underlay- underneath was wet. However the wall isnt damp, the stain and damp floorboards start 10cm or so away from the wall, and ive had the bath panel off to check for any damp behind - bone dry. Didn't come off after carpet cleaner came. £200 voucher to be won, Talk widget showing discussions of the day & trending threads, Subscribe to Mumsnet emails direct to your inbox. Carpets will become damaged and wooden floors will be prone to warping. Carpet installed in a basement directly over concrete can be laid using either the direct glue-down method or a stretch-in over cushion. What I'd recommend is that you buy a 100% Olefin carpet roll end at any retail flooring store and use double sided carpet tape to tape the perimeter of the carpet down to your concrete floor. … I can only think that the non-slip underlay thing under the runner trapped moisture coming up from underneath. As well as potentially absorbing moisture from underneath, if the air is humid the carpet could be exposed to additional pockets of dampness which could rot your carpet quickly. It was in poor condidtion (but didnt look water damaged to be honest) and I took it up. After taking up the plastic chair mat under a desk chair, the carpet is wet. Is that even a thing? Once this has been completed, water is added to the mortar to form a liquid damp proof membrane that can immediately be … When you touch it, it feels sort of sticky on your fingers, hard to explain. Carpet is a common choice as a finish covering for the basement floor. The water company came and listened to the pipes with a long rod and earpiece, determined there was a leak outside the front door and fixed it.Which is a rather long winded way of saying, if you listen to the pipes (if accessible), can you hear anything? We left it to air and it was fine for new carpet. Ideal for use in: Living Rooms Dining Rooms Bedrooms Stairs/halls Our Damp Proof Membrane provides an additional barrier protection between the sub floor and the underlay preventing moisture from rising up into the wood/laminate floor covering and damaging it. On a 1910 terraced house of my sisters I work on, the kitchen area has a concrete floor. For below-grade slabs, assume that the concrete floor will get damp at some point. Given how dry it had been that wet floor is down to a leak or water getting in from somewhere if it has rained very heavily just recently. Most damp-proof floor coatings are applied directly to the concrete floor surface using a brush or roller. The water ran down the slight slope of the pipe and a lot of water built up in the cellar whilst we were away on holiday. In principle all concrete floors should include a damp proof membrane across the whole floor area and this should be linked to the damp proof courses in the surrounding walls to provide continuity of protection against ground moisture. As an alternative, an epoxy resin coating can also be applied across the floor to seal it against damp. !The kitchen is tiled so I can’t see if we’ve got the same issue there, but I’ve not seen any evidence of the tiles lifting etc (though they’ve only been down 3 years). You have to find the original source for all that waterThanks - yes, that is my question, what is the best way to find the source?It’s definitely not the bathroom because that’s the far side of the house. I think so - if there is a slight incline it’s not noticeable. Installing carpet also helps to insulate the interior of a basement by keeping the floor … In this case damp air from the under floor area came through the floors and floor coverings into the rooms and eased the dampness under the floors. The temporary fix was to rip up the carpet, knock a hole in the concrete slab, repair the leaking pipe, fill in the hole with quickcrete cement, … Concrete slabs and floors can be excellent subfloor surfaces for tile and other floor coverings, but too much moisture in the concrete can cause problems with flooring installations.  What are the chances this is a result of moisture in the carpet from a cleaning over a year ago versus a leak in the slab? What may have started as a tiny leak will get worse over time as the hole or crack in the pipe gets bigger. As a result of the dampness rising, the dining room and hallway which are above it need to be kept well ventilated. Sprinkle the concrete floor with a light dusting of the baking soda and let it sit overnight. I recently lifted up the old runner in the hall and discovered that the beautiful old floorboards underneath it were damp. Baking soda works perfectly, not only for deodorizing the floor, but for absorbing moisture. You have to find the original source for all that water. I have to be careful not to step on them when going down there to bring up wine. It was easy to get it fixed, but drying everything out and having to replace things took a while. If the ground under the house is cold and damp and that is trapped by rubber underlay, I can imagine it having the same effect. Damp in concrete floors are much more difficult to treat than having damp walls. I know the word ‘damp’ brings out the snake oil merchants and can’t afford to spend £££ on something that doesn’t fix it...Panicking slightly that my whole house is leaking - any advice appreciated! Seems to be damp under there. Damp floor under carpet (17 Posts) Add message | Report. Concrete's porous nature means that water from under your home can seep up through your concrete floor, making it damp. There’s maybe a foot around the fireplace that isn’t wet, otherwise it’s the whole floor.Is there any chance it could just be condensation from having the rubber underlay directly over the original wood? Damp rising through concrete floor slabs is fairly common, causing damp issues on carpets and floor coverings, warping wooden floors and increasing the likelihood of low-level mould growth. Is the wet room at the same level as other parts of the house? or some kind of leak as its directly below the loft hole. If you don't have cellars, there will be a crawl space with a suspended floor and there should be an access hatch somewhere - probably in a hallway. Moisture under the flooring laid over concrete floor slab can ruin the adhesive that holds the top flooring in place. It had been a mystery to me where the damp was coming from (like you), until one night when it was quiet I heard a slight hissing. Duct tape an 18-inch square piece of plastic onto the exposed concrete and leave it for 16 hours. One of the simplest, most economical test methods for determining whether there may be moisture in concrete is the ASTM D 4263 Concrete Moisture Test. Discussion in 'Builders' Talk' started by emma1986, Sep 5, 2016. Newton 110 WATstop is mixed as a mortar and is ideal for filling slight surface damage, cracks, dents and holes, or to form internal smoothing fillets. 2. Without an underpad under the carpet, any moisture that accumulates under the Olefin carpet will simply evaporate through the carpet. And both of the options use the same layers of 1/2-in. Through the front.Is the wet room at the same level as other parts of the house? Can you access the area under the wet floor? The pH of carpet installed over concrete is predictably not at a level conducive to mold growth. how did you find out that this was the problem?When we got home from holiday and found the front half of the cellar under an inch of, thankfully clean, water. Either a damp-proof coating can be applied to the surface of the concrete or a damp-proof membrane can be laid on top of the concrete. Check it is ventilated. Here we tank a concrete floor that has no physical damp proof course. plywood, carpet pad and carpet as shown. The floor has got soaking, I've just lifted the carpet and it's wet and mouldy underneath, what would cause this? This is page 1 of 1 (This thread has 17 messages.). Imsorrylhaventaclue Fri 03-Aug-18 09:00:10. There are, however, two options for damp-proofing concrete floors without needing to replace the floor itself. As I would have thought the paint would have sealed any damp from coming up underneath the floor? Carpet Underlay for Concrete Subfloor With carpet, there is much more choice as you aren’t limited so much by the thickness and a damp proof membrane isn’t essential. Within a week or so, the "damp spot" progressed to a puddle 4 by 6 feet that a wet vac couldn't really keep up with. Have you checked for roof leaks and or signs of damp on the top of the loft hatch cover? Condensation on carpeted basement concrete floor. Mysteriously enough, even if you do not have bare concrete floors and you have carpet, tile, vinyl or wood flooring, moisture and condensation can still cause Sweating Slab Syndrome with temperature fluctuations. Cut them out and replace, half hour job, problem solved, Oh, and the fact that Emma has carried out a moisture test and it reads "Yes, you are right, DA - it. If the room doesn't smell damp then I'd say it was a recent occurrence. Depending on where a leak is, if you have a water meter and make sure anything using water is switched off, there is a bubble on the meter that will be moving despite nothing drawing water. It will work up to point, trouble is it will 'sweat' under the dpm so it will be soaking underneath. When the house was bought, there was laminate flooring down in there. The damp-proof membranes used during construction of concrete floors are often thin, and can easily become torn before they are laid, rendering them ineffective. But there are other factors to consider, such as the room or area of the home that the carpet is being laid. Underneath the floor was damp to the touch. It doesn't smell. its a central stain down the centre of the landing. You then have two options, depending on your circumstances. That's one hell of a lot of condensation to leave wet patches on clothing and you haven't answered my query as to whether the room smells damp. It looks quite odd - runner shaped rectangle of dull, matt, dampish wood surrounded by shiny waxed boards. (You must log in or sign up to reply here. Yesterday we decided to lift the carpet/underlay in our front room (ground floor) to expose the lovely parquet underneath - only to find that the whole thing was saturated with water . It sounds like you’ve got the same effect. It’s a Victorian house if that makes any difference.My other thought is that it’s because they’ve rendered over the damp proof course - is that possible?Either way, I was planning on leaving it for a bit to see if it dries out in the air, but not sure if it’s the sort of thing I need to address ASAP. The carpet on the landing upstairs has a huge stain on it, talking maybe 1.5m long and 30cm wide, all along the centre of the corridor. Water finds the lowest point so a leak elsewhere could theoretically result in water in a different area. wowfudge:Where does the water main enter the house? The carpet always feels wet or damp. We don’t have puddles, but it feels damp to the touch and if you sit on it you stand up with a wet patch on your clothes. A damp proof membrane (DPM) is used to create a barrier between a concrete (or screed) subfloor and the floor covering that is laid on top such as wood, ceramic or quartz tiles, laminate or carpet. The kitchen floor suffers from dampness and is lifting the old vinyl tiles.  Not damp, but wet. This won't help you if the leak is before the meter. As a general rule synthetic carpets are a better ch… Is it laid on a solid floor, or is it hollow underneath?The Victorian cottage (part of a very basic terrace built for farm workers) that was our first house had floors laid directly on packed earth.The floors were the original porous clay tiles, which was fine. The type of materials you choose for your carpet will help to determine how well it can withstand any moisture, which in turn will give you an idea how long it will last. Yesterday we decided to lift the carpet/underlay in our front room (ground floor) to expose the lovely parquet underneath - only to find that the whole thing was saturated with water . Thanks for your response KIAB. No, I’m typing on my phone and it takes a while - we cross-posted before. There is a sub floor over the concret and a carpet glued to the subfloor. Sounds like a similar type of thing, but I don’t know where my rising water is coming from. That's one hell of a lot of condensation to leave wet patches on clothing and you haven't answered my query as to whether the room smells damp.We had a leak in the pipe linking the house to the main. Warmth: A basement carpet pad will help hold off the feeling of cold and dampness that concrete basement floors can transfer.The feeling of cold has always been one of the biggest drawbacks of concrete floors, especially in the basement. Natural humidity in the air permeates the carpet and the pad and then condensates on the concrete floor. To Think My Parents Have No Idea What Life Is Really Like? It eventually turned out to be the old lead pipe connecting the mains to the house. Is it a suspended floor with airbricks in the external walls of the house below the levels of the floors internally? Commonly, concrete floors are vulnerable to moisture and suffer from different detrimental influence of moisture such as lifting tile off the floor, rotting hardwood, damping carpet, coating delamination and many more. Mould and mildew often forms on damp concrete. Have thought maybe central heating fluid as the boiler is up there (not directly above but they may have dropped a container of it out - Ive done that with paint in a previous house, ouch). MadMaryBoddington No cellar (unfortunately - I’d love a cellar ). Concrete is usually used as the subfloor for basements in homes, and since most basements are below ground level, this makes them prone to dampness. I’ve binned the runner and am hoping the wood will dry out. Is it coming (leaking) from your bathroom or kitchen? For a dry, mold-free, finished basement floor, always install a vapor barrier before laying a wood subfloor or carpet pad. Answer. If I remove these tiles, can I seal the concrete surface or should I replace the floor slab? Interesting, thanks - how did you find out that this was the problem? Indeed, it’s not just these first signs of damage that can prove costly. But, a moisture meter works on electrical resistance, you stab two probes into the wood & that is converted to a readable figure on a dial, so would you get a reading if board was soaked in some other substance. Question on moisture in old concrete floors. Preferably done late at night! There is no pipework, nearest is the bathroom which is behind one of the walls. Chances are, with a house of that age, that the metal supply pipe from the water main has corroded or fractured over time. The sink in the kitchen’s by the back door and the wet floor is at the front. Is there a cellar underneath? ... it was ona roll at the carpet shop warehouse, and was cheap. Damp-proof floor coatings. The soda will natural deodorize the floor and pull the excess moisture, which is typically the cause of the damp smell, out of the concrete. It is a good choice overall because it softens the surface and increases the comfort level when you walk across the floor. Oh and we had carpet and rubber underlay over the original parquet in our Edwardian house when we bought - dry as a bone underneath. Win up to £500 worth of clothes: Share what you would buy from Zalando, Would you like to test Pura’s eco nappies or plastic free baby wipes? I am renovating a house with concrete floors constructed in the 1950s. Option B is sufficient if your floor is generally dry, except for small amounts of moisture evaporating through the slab. Not really sticky, but like you really want to wash your hands. No obvious damp smell but there was some small patches of white mound under the underlay so it’s not super-super recent.We had a leak in the pipe linking the house to the main. Where does the water main enter the house? Tell me some other chemicals which conduct electricity. The type of padding you select for a concrete floor is perhaps even more important than the type you use in rooms upstairs. ). One of the biggest challenges in laying carpet on concrete is the degree of moisture that your carpet might be exposed too.  We were re-plumbed a few years ago so there shouldn't be an active pipe there, but this room is next to a bathroom. Therefore, it is recommended to implement necessary […] Sign up here, How have you shown your appreciation for the NHS? So its not coming from there. The ground under a house would take a lot longer than a couple of months of dry weather to dry out completely. My cellar becomes a refuge for frogs during droughts because it remains slightly damp; they come in up the drainage channel. Therefore, it's advisable to have a floor tested for moisture content prior to installing flooring or moisture barriers. These problems are not only disrupting functions of the building due to maintenance operations but also costly. Moisture in floors … The next membrane width is rolled out so that the edges of the membrane overlaps. However, if new carpet has been laid in the renovated building without rectifying the sub-floor ventilation and rubber or foam underlay and backed carpet is now sealing the floors, this can cause problems. It's also a very slippery material so it's likely the carpet will slip all over it. Condensed moisture accumulation under the plastic at 16 hours can indicate a problem. In my last house I had a damp problem. Floors can easily suffer from moisture ingress otherwise known as penetrating damp. I am pretty sure its either from a spillage (pretty big one!) The reason for this is that concrete is a very porous material meaning that water can rise through capillaries and therefore lead the property to suffer from having damp floors. There aren’t any central heating pipes running underneath either so it’s not one of those leaking.My gut instinct is that to be so even across the floor it’s either got to be some sort of condensation, or that it’s coming up evenly under the house from somewhere. Floor slab a result of the floors internally as I would have thought the damp under carpet concrete floor. Moisture under the runner trapped moisture coming damp under carpet concrete floor underneath the floor slab can ruin adhesive. To use this feature subscribe to Mumsnet Premium - get first access to new features see fewer,. That damp under carpet concrete floor caused problems that this was the problem replace the floor that the of... 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