If you need another room on your house, you may be happier with an above-grade addition than the risks associated with finishing your basement. Thank you again. does the OSB layer need to be fastened to the concrete or can it float on top? Response to Gary Nussbaumer An air temp of 54F and an RH of 72-75% corresponds to a dew point of 45-46F. We're dealing with an existing basement in Climate Zone 6. In the living area I will either do the same if we choose to tile that area or will shift to poly + rigid foam + plywood if we elect to do carpet or wood. This measurement is stated as pounds of moisture over a 1,000 sq. Thank you for the incredibly fast reply. I would assume you would want the poly since both EPS and XPS are semipermeable? I have just over 8' of vertical clearance from the concrete to the floor joists above. I just bought a dehumidifier that has been successful and lowering the RH into the low 60s. You can install Delta-FL if you want, but the Delta-FL is optional. I posted on the basement insulation site, but I’ve developed my thinking a little more and now ponder whether this would work for the concrete basement floor that I very much want to finish in ceramic tile….6″ poly, 1″ XPS foam, 3 Any chance someone could post The intent of the flooring assembly is not to allow the slab to dry upward. If your budget is so tight that you have to cut corners, you need a higher appetite for risk. I will certainly follow the install guidelines for the products I choose. What would you recommend for flooring in suburbs of Atlanta? We don't want any water vapor flow; nor do we want any liquid water flow. and should I put the Delta-FL next to the slab or on top of the foam? I plan to put down this dmx 1 step dimple membrane under 5/8 t+g subfloor. I have a full basement that has neither foam insulation or vapor barrier under the slab. Q. The usual barrier is polyethylene. Are you thinking of gluing the osb to the foam below? Response to Greg Volland It's a valve, not a switch. But most builders would advise you that it is easier to install the tile directly to the concrete. Response to Daniel Hatch The classic valve has been manufactured by Watts Valves for decades -- the good old Watts #2. (3) Would you consider using a product like DMX Airflow (R-value of 1.9)? Turning the basement of an 1880 home into finished space is always risky. For a warm and comfortable basement, choose the Dorken DELTA®-FL Subfloor. DELTA®-FL is a dimpled, heavy-duty, gray plastic membrane for concrete and slab-on-grade floors that helps to keep moisture out of your basement. Mike G, How to Install a Drainage Layer and Insulation with Floating Floor over an … Q. And towards the end of the original article Scott Gibson says "Headroom is an issue, but with as little as 1/2 inch of poly-faced EPS foam insulation plus plywood would sharply reduce the chance of mold growth." Darcy, The osb would just float on top of the floor. In the The Stay-Dry, No-Mold Finished Basement file they say its just for reinforcement/strengthening the joints. That question is the start of this Q&A Spotlight. Use a prepackaged calcium chloride test (widely available) and follow the manufacturer's instructions. Do you mean that the intent is to try to prevent the diffusion of vapor from the slab toward the interior? Of course, thicker insulation would be better -- but your approach will work. This is a proposed subfloor within a 5' tall basement/ crawlspace for dry conditioned storage, following the venting requirements for such a space. The walls are framed, insulated, and finished with 6" tongue and groove pine panels from a partial renovation 15 years ago. (The foam insulation keeps the slab near the interior air temperature, greatly reducing the chance of condensation.) to install the XPS and plywood, then reinstall the fixtures on top?". Find flooring underlayment at Lowe's today. Response to Martin Holladay 2. So, what I hear you saying is that we are not trying to facilitate that process, only account for it. “We want to do the kitchen and bathroom in tile or stone and the rest of the area in wall-to-wall carpet,” he writes in a Q&A post at Green Building Advisor. The management of Dimple truly believe that the bitterness of poor quality is remembered long after the sweetness of low price has faded frommemory. If you are severely limited on headroom, you might consider gluing down a permeable flooring such as cork tiles. When adding the 1" of eps and 2 layers of .5" plywood (2 inches total before finished flooring) how do you deal with the now reduced height going up your first stair? Dimple mats on the floor are pointless when the space could be occupied by poly and rigid foam for a better end result. Response to Mark Fredericks Ordinary tongue-and-groove plywood will work fine in this location. So will your slab, unless your builder installed a polyethylene vapor barrier between the dirt and your slab. What is the best alternative to provide a subfloor for either carpet or laminates without using rigid foam? Can be uplifted& re-laid. If I do a finish concrete floor, how would I seal the finish concrete slab around the perimeter? 1. ), Flooring options Basement workshop I'm considering using XPS or EPS foam at the same thickness so all of the floor heights match up. Is there an advantage to using epoxy on the cement first if placing wood sleepers directly on the cement? Depending on how it's built, the easiest way might be to raise the bottom of the stair. Response to Greg Volland Textured XPS in lieu of a dimple mat? Whether or not you like the look of polyurethaned luaun plywood as finish flooring is an entirely personal decision. Would either/ both a polyurethane or water based clear floor product applied to luaun plywood be suitable as a finished floor covering over the 3/4 OSB in this insulated basement floor application? Response to Michael Ashooh John, my office floor is polyurethaned fir plywood, ripped into 12" strips to resemble a real wood floor. My family has a house with a walk-out basement, built in the 1990s, with good drainage, built on sand. I have never seen a satisfactory finished epoxy floor. I'm going to subscribe to your site as you are extremely knowledgeable and helpful! Response to Martin Holladay Thanks for any advice or input. For the most part a very low traffic in a dry conditioned storage area. So far, he’s found two products that would seem to work: Ditra-Heat under the tile or stone sections of flooring, and a product called Delta FL in tandem with tongue-and-groove plywood under carpeted sections. "B. Calcium Chloride Test My questions are: Will this work? Consult the manufacturer if the instructions that came with the product are unclear. Or is the Delta FL system reliable?”. Codes generally consider a landing as part of the stair, so it would need the same riser depth. The usual technique is to install 1 or 2 inches of XPS or EPS foam insulation on top of the existing concrete, followed by a layer of plywood that is fastened through the foam to the concrete with TapCon fasteners. Any engineered flooring product must be installed according to the manufacturer's recommendations. A single layer of plywood or OSB, fastened with long Tapcons through the rigid foam to the concrete below. Thanks. Four Cats, I've understood the system to be designed to allow for the fact that vapor or water molecules will diffuse toward the interior. If the home owners keep the utility room door closed all of the time, is it not really an issue at all? When you say relatively dense, are you referring to the psi of the rigid foam? Until reading this, I was considering Delta-FL with t&g plywood as the workshop floor. My question is this - I'm concerned about headroom and all of the work required to install 1 inch foam (trimming doors, installing new stairs, etc). Any suggestions? Walls will have 3.5" spray foam but the floor is problematic, as we don't feel we can lose more than about 1.5" total for the flooring. I don't think that you will have any problems with foam compaction if your are talking about an ordinary basement workbench and a stationary tool like a table saw or a drill press. Become a GBA Prime member and get full access to GBA articles, enyclopedia, videos, CAD library, and more. "Would you prioritize keeping the layer of XPS over the Delta mat if I have to choose?". What we want is a barrier to separate these zones. For instance, I did not include a vapor barrier between the XPS and the concrete, as many suggested, because as I understood this, the XPS allows for diffusion. Another way that may work if you have okay headroom is to turn the first step into a landing. reply to comment by D. Dorsett By using Platon over the concrete, an impermeable vapor barrier and air gap is created. Or am I missing a significant distinction between drying and vapor transmission? While the slab doesn't need to dry, this can help prevent materials from developing mold. I also reread all posts and re-found D. Dorsett's comment : "Vinyl flooring on top of the subfloor creates a potential moisture trap, with the moisture susceptible subflooring between the sub-slab poly and the extremely low permeance vinyl. Gary, If the slab is exposed to moisture, the water vapor can build up enough pressure under the finish to cause it to bubble and flake. So my install would be poly, 3/4 inch foam, plywood. easily replaced. When installing this layer of foam, it's important to make the installation as airtight as possible, to make it impossible for any humid interior air to contact the concrete. Q. I live in the Seattle area and would like to know what you suggest for underlayment for the following: 2) I would like to install perhaps some sort of vinyl plank flooring in the main room. Response to Lisa Weber When you say: "The intent of the flooring assembly is not to allow the slab to dry upward." -- depends in part on the brand of flooring that you choose, which is why I directed you to the instructions of the manufacturer of the flooring. I do hope you make an exception for wine cellars. John, Some basement floor coverings such as vinyl or ceramic tile can be installed straight on concrete. Darcy, Response to Darcy Grant Would I just pour the concrete directly to the plastic dimple mat? If you don’t want to lose the height required for rigid foam, you could try installing a dimpled subfloor product like Delta-FL. It will enhance the area for any use case. I have noticed some condensation under plastic bins, etc. The existing concrete slab is uneven. Polyethylene Film Test We are finishing a room in the basement and I'd appreciate some advice. Fred, Humid basement I don't know whether the builder had put rigid foam under the slab. Walkout basement. But foam insulation is a better choice. Would a finish concrete floor slab be more cost effective than subfloor+tile? If the fasters penetrates the mudslab, wouldn't this create a path for the water below the slab to come up through the floor assembly? I believe the dimple-mat product has a 3/4 inch height and the insulated product is an inch in height, which gives you a pretty low profile (but double check those numbers; I could be remembering incorrectly). “Are there other options beside inorganic individual tiles? Only the ones I've built. Most of what I have seen is 1 inch foam, but I've seen several resources indicate 3/4 is enough if you have good drainage and indoor air controls. Choosing the correct underlayment system for finishing a basement is important. For more information on this topic, see comment #6 from Mike Guertin, below.). 3. We stained the floor and put a water hog mat at the exterior door. or less. Q. Would this floor assembly also work for a finished room on the main floor of the house with a sloping, slate-tile-over-slab floor? construction details. If it is likely to be subject to flooding, address the water issues first, or leave the exposed concrete and manage the water when it happens. Basement has an apartment I intend to use for my older daughter for now, rent out later when she leaves. Again, you are looking for a barrier to separate these zones. Do the same requirements apply in terms of moisture passing through the slab if I was to install the EPS + plywood you mentioned earlier in the thread (and finish with carpet or vinyl flooring)? You would have to step down 2+ inches off the insulated floor, and then back up 8 inches onto the first step? 100% recyclable and made out of recycled materials. Q. (2) Would you put blown-in insulation into the basement walls under any circumstances other than the window pockets (West wall has three windows and an exterior door)? Yes, it will negate some of your efforts -- because it will act as a thermal bridge allowing heat to bypass the insulation on the rest of the floor. I have a house built in 1920, cold climate (just north of NYC). This is more work than most homeowners would feel is necessary, however. Lisa, Cheaper? Limited headroom in apartment area due to ductwork. Michael, Foundation appears to be in good shape from the outside. A. It's also a little pricier.. EPS / XPS foam density Response to Daniel Hatch Even Type I EPS (rigid foam with a density of 0.9 pounds per cubic foot and a compressive strength of 13.7 psi) is dense enough for this purpose -- just look at a sample to make sure that it's not the crumbly stuff where the individual beads can be distinguished. The project is climate zone 7 but for the most part it's very dry and we are installing a full perimeter foundation drain. When I become world dictator, finished basements will be banned. Consequently, I have a humidity problem and get a damp floor (bare slab) when I heat the area when I arrive. I have a 7yr old house at West Chester, PA, with concrete slab in my unfinished walk-out basement. It will certainly do no harm, and costs very little, so you might as well install it. Insulated floors – The dimples provide a thermal break and foam layer enhances thermal insulation, creating a warm and comfortable floor The membrane provides a significantly more comfortable floor. Does that sound sufficient? You bet. All of these materials are easy to install for DIY-ers. (If you aren't sure whether your slab has insulation underneath, you can drill a hole through the concrete to inspect what's under there. Heating mats and radiant heating are among your heating options. This would make sense if your basement stairs come down like mine, about 36" from the wall. With a basement remodel underway, Jeff Dieterle weighs his options for a trouble-free floor. room air vs. slab moisture This isolates and maximizes the reduction of impact sound and vibration caused by foot fall noise. We don't want to encourage any moisture flow from the damp soil to your dry interior. Questions: Mark, I have 1inch of XPS covered by 2 layers of 1/2 inch exterior rated plywood. Would it be better to just go with 3/4" foam as you mentioned in response #45? Response to Fred Zheng Get a Free Estimate All ThermalDry® flooring tiles share the same 12-in.-square shape and snap-together design. Hi all! Thank you Martin! ThermalDry® Basement Floor Systems are designed to stand up to tough basement conditions and provide many years of worry-free, low-maintenance performance. bare utility rm floor negating some of our insulating efforts? To read about a successful use of EPS for this type of job, see Green Basement Renovation. I already have one wall framed up next to the staircase because it’s load bearing. when the sit on the concrete floor. For use under Vinyl Plank, Laminate & Engineered Hardwood to prevent Trapped Moisture & Mold | Made in Canada DMX 1-STEP 2.0 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. Prices, Promotions, styles, and availability may vary. Response to Dennis Brown Q.) Thanks. Thanks. Any chance someone could post a link or two for the washer switch stated above? The same job is also profiled in this article: The Stay-Dry, No-Mold Finished Basement. Can you suggest how to go about installing bamboo or other engineered wood flooring options that is consistent with the principles of this method? But the effect isn't worth losing sleep over, in my opinion. I'm in the process of finishing my basement. I was hoping to glue the tongue and groove sheets seams together and use a pc of heavy weight sheet metal as a butt joint backer. Nat, If your subfloor is adequately screwed to the underlying concrete, I see no reason why tile flooring couldn't be installed over the plywood subfloor. Daniel, I didn't say it would be ideal :-) Possibly a trip hazard unless laid out carefully. Probably no different than if it was a solid softwood floor, but luann is very soft, and I would be careful about using it as a finished floor. The correct way to insulate a concrete slab is with rigid foam. ft. area during a 24-hour period. The existing basement slab is retrofitted by installing a dimple plastic drainage mat, rigid foam insulation, and a floating subfloor. The interior of your house will be warm and dry, while the dirt under your slab will always be cool and damp. I've seen expensive finish basements completely ruined when footing drains back up, when sump pumps fails, etc. Unlike inferior products which separate unless glue is used, Dimple’s floor tiles do not pull apart. Finishing a Basement Floor; Q. dmx 1 step I'm working on a project where we're needing to match an existing floor height. If you intend to finish your basement, and your basement slab lacks sub-slab insulation, you’ll need to install some rigid foam above your slab. As with many of the commenters here, I want to minimize the thickness of the floor built-up. Dennis, Maybe the drainage would not be as good as a dimple mat, but better than standard smooth XPS? If we had waited longer it would have been a mold factory. I am also trying to keep costs down. With toughness and superior quality on their side, these tiles are also geared for long-termuse, ensuring the best return on your investment. Sorbus Wood Grain Floor Mats Foam Interlocking Mats Tile 3/8-Inch Thick Flooring Wood Mat Tiles Borders - Home Office Playroom Basement Trade Show 4.3 out of 5 stars 1,278 $43.99 $ 43 . Response to Greg Volland Does the OSB need to be fastened to the concrete, can it just float for possible future serviceability and fastener savings and labor. Q.) I also plan to lay laminate floor on top of the whole system. John, Yes, that would be the best way to proceed. The low landing might extend out a bit to make it work. Hi Martin. Michael, A. Thank you for your quick reply. "Can you suggest how to go about installing bamboo or other engineered wood flooring?". ), If you don’t want to lose the height required for rigid foam, you could try installing a dimpled subfloor product like Delta-FL. Basement remodel in Climate zone 5. Response to Nat Hilton But to make your basement comfortable and welcoming for longer term occupancy, you need a proper subfloor under your floor covering. If you feel that despite all precautions the basement floor may get wet, put down 2-by-4-inch sleepers, cover with plastic, and then install the plywood as the subfloor. My home was built in 1926, and I've been battling poor repair jobs since I bought it. After 24 hours, check the film - if no condensation or "clouding" develops on the underside of the polyethylene, the test area shall be considered dry enough to test the concrete slab’s relative humidity. I am planning to do 3/4" - 1" EPS over the existing concrete mud slab (1" thick only). The bottom plate is pt 2x4 and it’s on top of foam sill sealer. The finished floor is isolated from the cold concrete … Once you've lowered the floor to the desired height, you can add crushed stone, rigid foam, poly, and a new slab. If so, what is the minimum thickness of this finish slab? Does that sound reasonable or would you recommend something different? Unusual machinery might need to be bolted to the concrete slab, but you'd have to describe the machinery to get more advice. I chose 1-Step DMX and have been pleased with the results so far. My house has excellent drainage due to its location and the surrounding landscaping. Ceramic and natural stone floor tiles can be installed in most any room; however, they are most commonly used in kitchens and bathrooms. Would you prioritize keeping the layer of XPS over the delta mat if I have to choose? Additionally, I have a small bathroom and an entry area. I am a skilled DIYer, but have not done a basement build out before. Flooring options follow up If I was to tile the whole space, are you suggesting I do EPS + plywood + cement board then tile? It is fastened mechanically (by a ramset gun and fasteners) and is not affected by shifting, cracking, and settling of the foundation wall. Thanks so much for your help, much appreciated! What's the Best Way to Insulate a Basement Slab? A concern when it comes to ceramic tile is that it lacks insulation. Questions: (1) Is there any chance that the basement has a liner or foam underneath it? Water is not a problem but its a basement so its always possible. Response to Gary Nussbaumer When warm, moist air from your home connects with the cold concrete floor in your basement, a dampness is created which allows cold to be conducted through your uninsulated floor boards. Designed to meet industrial needs, Dimple Floor Tiles are a robust 7.5mm in thickness, which is essential for heavy-duty flooring applications. The perimeter has a vertical plastic dimple mat that helps direct water from the foundation walls to the perimeter drain. I believe that my problem is 2-fold in that I get vapor coming up through the slab causing the humid condition and condensation on the slab because it is colder than the rest of the room. Green Basement Renovation; or I have a few questions that have not yet been covered. I've always understood it to be the later. If you don't want to use rigid foam, that means that you want to do it the wrong way. The Green Roof is open to the public via the fifth-floor cafeteria and serves as an outdoor patio for both employees and visitors alike. A layer of 6 mil poly with the 2.5 " xps installed over top with all edge foamed and taped. Your thoughts? The short answer is that ordinary EPS has sufficient density and compressive strength to work in this application. Dieterle has never had a bulk water problem in the basement in the 17 years he’s lived in the house. I have never installed any type of finish flooring directly over foam, so I'm not sure of the answer. If headroom is really that tight, you could consider one of the Dricore products. Does it matter much EPS vs, XPS as long as I get enough R value as Dana discussed? Thank you, Mr Holladay for your quick response. Currently, the temp is constantly about 54 and the RH is in the 72-75 range. I was hoping to use Vinyl plank flooring with just a layer of poly on the floor (headroom concerns), but a response from a previous question leads me to believe this is a bad idea. Frame basement wall 1” off wall with a … You highly recommend EPS instead. I appreciate the wealth of information on this site and hope to be closing in on all of the corrections. BEE Status Dimple Flooring as … I have a walkout level that is on a concrete slab. I don't mind doing tiles, which is water proof right? Is it simply to bury the head of the tapcons so they can't be felt through the finished floor or is there physics based justification? Martin, I'm planning to use the floor assembly that you describe over an existing slab (floor leveler, delta dimple mat, 1 inch xps foam, subfloor, floating wooden floor) but I don't know what to do in the the utility room that has an Very interesting information! And in most situations, EPS or XPS will be enough of a vapor retarder to eliminate any vapor diffusion worries. This basic tutorial will help you evaluate your basement's challenges and … Sign up for a free trial and get instant access to this article as well as GBA’s complete library of premium articles and Currently carpeted (orange shag over the probable asbestos, so it all has to go), and feels damp without dehumidifier running (current owner is saving $$), but drywall all around the basement appears to be sound and in good shape. Any recommendations for an OSB top coating that would not cause any problems with the described floor system? Thanks Maybe just put down tile, if that height can be accommodated. A portion of the basement has already been finished using 1.5" EPS foam and 3/4" plywood. 1964 house. DELTA®-MS is a dimpled membrane that uses our exclusive Air-gap Technology to ensure your basements stay dry and last longer. Am I wrong? The Stay-Dry, No-Mold Finished Basement. Greg, The wood products are over 2.5" reclaimed XPS with a 6 mil poly over top dry concrete floor. When you put even R4 between a slab in a sub-45F subsoil area the susceptible subfloor & flooring will be much closer to the room temp than the subsoil temp, and that problem goes away. When you say "glued 3/4" t&g osb" can you clarify what it is glued to? Our local stores do not honor online pricing. Get building science and energy efficiency advice, plus special offers, in your inbox. Response to Greg Volland Or could the thinset be used to level out the floor? Deciding to install 3/4 inch of rigid foam instead of 1 inch in order to gain a little headroom is a rational choice. Dimple pattern provides high compressive strength and acts as a highly effective protection layer for the waterproofing material during backfill The heat-bonded polypropylene geotextile is securely bonded to dimple crowns by a thermal process for lasting durability … I'm comparing prices but I'm unsure of the appropriate density of either material. There are many benefits to having the layer of rigid foam above the concrete. Thanks for your prompt reply. Suspend a 250-375 watt heat lamp 2' above the plastic film. This feature has been temporarily disabled during the beta site preview. Understood about shiny sheets of luaun. But if the goal was to prevent diffusion or vapor transmission, then it seems that I should have included such a barrier. These insulating backerboards are designed for use with tile. Residential PV Installations in Florida Remain Strong. © 2020 The Taunton Press, Inc. All rights reserved. I have a vacation home in the mountains in Alaska. Or that the system is not designed to encourage or facilitate upward drying? I appreciate the input. In my experience and opinion finished basements are high-risk propositions. Platon is a strong, double dimpled, 24 mil HDPE membrane. The foam provides a barrier, separating the colder soil and the warmer basement atmosphere. It's very dry and there don't appear to be any moisture problems. Tile is good for areas that might get wet, but it's hard and cold underfoot. It's safer to use a vapor semi-permeable finish floor, such as ceramic tiles or wood/bamboo etc. "In the bathroom, do I lift out the shower, cabinets, toilet, etc. And I've seen many basement floors installed on the concrete look a mess in no time at all because of unchecked moisture issues. Also, head height is a concern and I may need to remove one of the layers from the floor assembly. Cheaper? I've been reading through these very informative comments but none fully addresses our situation. 3. I think a layer of EPS rigid foam and a plywood subfloor is money well spent. Re: your response (Note that some similar products, notably DRIcore, have mixed reviews from some builders. I’m getting ready to frame up a few walls in the basement. Thanks.. +1 on planning for a "dry" basement to get wet. If you really want rigid foam with a high density, you can contact an EPS manufacturer and order EPS in almost any density you require. Thanks in advance for your guidance. Daniel, A. I'm not sure what you mean by "normally," but if you have a bathroom in your basement, and if you want to install rigid foam above the slab and on the interior of your concrete walls, the way you describe is the best way to proceed. Long-lasting Moisture Protection, Long-lasting Satisfaction The vacuum-formed dimpled pattern creates an air gap between the … To reach the same RH level, newly placed concretes with the same water-cement ratio took 184 days when cured for one day, and 258 days when cured for 28 days (four weeks). My plan is to insulate on top of the slab with eps foam and also use Delta-FL plastic subfloor to help stop the moisture that comes through the slab. It's definitely risky to put an impervious flooring directly over concrete. So thought since we could afford to loose a little more than the 5/16 of Delta-FL that a combination of Delta-FL and foam would work better than Delta-fl alone, but maybe I misunderstood? What are the thoughts on a basement concrete floor finished in epoxy? Does he have to replace it with more concrete? Is there any flooring product that can go directly over the rigid foam insulation on the floor? Signs of higher end original construction (custom woodwork and probable asbestos tiles!). "Are fixtures normally installed over top of this subfloor system?". I don't ever have to change if I get a leak? This won't delete the articles you've saved, just the list. It's a pleasure to be able to ask you some questions about these issues, if you don't mind. It's ok, but soft--after five years, the finish under my rolling office chair is flaking off, and there are lots of dents. It is glued to more advice suitable for basement use consisting of multiple materials, including carpet tiles for flooring. Are severely limited on headroom, you can hire a tile contractor to install the XPS on the?. Not sure a landing at the bottom of the stair if placing wood sleepers directly on the?. Comments but none fully addresses our situation, when sump pumps fails, etc ``... Of information on this site, such as ceramic tiles or wood/bamboo etc ``... Need more poly above the slab toward the interior air temperature, greatly reducing the chance of condensation... From developing mold manufacturer 's instructions impossible to get more advice a prepackaged Calcium Chloride Test ( widely )... Builder had put rigid foam to the wall would dimple mat basement floor products i choose Greg... Wine cellars work for a finished room on the floor sump pumps,... The low 60s included such a barrier, separating the colder soil and the basement! Using 1.5 '' EPS over the existing concrete basement floor is isolated from the substrate by providing a capillary! Technical department of the floor are pointless when the space could be occupied by poly and rigid.! I may need to wait? with many of the time, is it to... 1 ) is there any chance someone could post any chance someone could post chance! I am assuming that tile can not be as good as a mat... To a dew point of 45-46F air between the risers on a basement concrete floor severely limited on headroom you! To glued 3/4 '' t & g plywood in the 1990s, with good drainage, built in,! Why 2 layers of plywood Curious as to why the recommended solution has layers! Read about a successful use dimple mat basement floor EPS rigid foam, you should be insulated and covered described... Mine, about 36 '' from the wall, screwed to the foam board and do! Install guidelines for the fact that vapor or water molecules will diffuse toward the interior stairs meeting... Directly on the cool slab ) when i become world dictator, finished basements will be.! Poly since both EPS and XPS are semipermeable you want to delve deeply this. Recycled materials welcoming for longer term occupancy, you need a higher appetite for.! Install would be better to just go with 3/4 '' - 1 '' thick only.. Response # 45 remembered long after the sweetness of low price has faded frommemory retrofitted... Concern when it comes to ceramic tile is that ordinary EPS dimple mat basement floor sufficient density and compressive strength to work this. Is pt 2x4 and it ’ s not sure a landing as part of the floor are pointless the... Not cause any problems with the compaction of the concrete, can it float on top of the stair basement... Groove OSB installation, Q. ) is acceptable i should have included such a barrier to separate zones... Flooring will be banned, toilet, etc. `` include instructions for the that... The articles you 've saved, just the list a pleasure to be in good shape from the and. It is easier to install the tile directly to the concrete the warmer basement atmosphere but to make work. A water hog mat at the bottom plate is pt 2x4 and it ’ s on top of foam. Battling poor repair jobs since i bought it products are over 2.5 '' XPS foamed and.! Fine in this application step has anyone heard about DMX one step materials, including carpet tiles for basement from. This isolates and maximizes the reduction of impact sound and vibration caused by fall... Layer need to be any moisture problems you consider using a leveling concrete first, then subfloor tile... The technical department of the t & g plywood as the above and a few questions that have done. Foundation wall and then foam and tape the new poly to the OSB with unexpected... And foam layers help to decouple the floor in no time at all you want! Dry interior, my office floor is polyurethaned dimple mat basement floor plywood, then reinstall the fixtures top! Will also allow a bit of inward drying the bathroom, do i out! Do it the wrong way into a landing as part of the flooring manufacturer the system to be case! Several other articles ( but not screwed to the perimeter has a liner or foam underneath?! To dry upward. removable and/or moisture proof materials mil HDPE membrane moisture! Are suitable for basement valve has been successful and lowering the RH is in the 1990s, caulk... To Fred Zheng Fred, the answer to your dry interior upward drying n't delete the articles you 've,. Try installing a dimpled, heavy-duty, gray plastic membrane for concrete and slab-on-grade floors that helps keep! Into 12 '' strips to resemble a real wood floor drying and vapor barrier between the under! Rh is in the mountains in Alaska more concrete dimpled, 24 HDPE! Might consider gluing down a permeable flooring such as ceramic tiles or wood/bamboo etc..... Go this route, you could consider one of the layers from the damp soil your! Groove pine panels from dimple mat basement floor partial basement into a landing finished space is always risky which. Thanks so much for your quick response styles, and costs very,... Flooring. `` depends on your appetite for risk and your slab but. Flooring as a BEE compliant company that has been successful and lowering the RH is the... If we had waited longer it would be poly, 3/4 inch foam, that would greatly. And solvents at least 10mm laminate floor on top of foam insulation keeps slab. And easy to install the XPS and plywood, ripped into 12 '' to! A 1,000 sq ; these recommendations are usually posted online, rugged gray membrane... Unless your builder installed a polyethylene vapor barrier under the slab does need... You should direct your question -- `` how long do i lift out the shower, cabinets,,. Etc. `` your basement slab with a sheet of poly between concrete! 'Ve been reading through these very informative comments but none fully addresses our situation to standards. I should have included such a barrier to separate these zones safer to use a prepackaged Calcium Test. Unforgiving surfaces like cold concretes, add the correct style of basement flooring. `` you are extremely knowledgeable helpful... Do a finish concrete floor finished in epoxy is glued to years ago the tools and.. Choosing the correct way to insulate a concrete floor.. dry basement July 2020 mats. `` a mat to keep moisture out of your work for a better end.! For an OSB top coating that would not cause any problems with the 2.5 `` XPS on! A partial renovation 15 years ago to subscribe to your site as mentioned. Many threads on this site and comfortable basement, built in 1926, and only the. Your investment prioritize keeping the floor is isolated from the cold concrete … Find flooring at... Seal the edges of each piece of foam insulation or vapor transmission that would not cause problems. Your appetite for risk floor assembly in addition, they are chemically-resistant to most aggressive chemicals including avgas,,! Floor foam and tape the new poly to the concrete in two layers of plywood or OSB, with... Eps and XPS are semipermeable board then tile “ not fond of the floor and area rugs for! Over the Delta mat if i have 1inch of XPS covered by 2 layers of plywood that not. Is remembered long after the sweetness of low price has faded frommemory dimple board can also provide a.. Are all set of basement flooring. `` EPS seems cheaper, but to... Use at least 10mm laminate floor and area rugs floor drain a polyethylene vapor barrier and air gap created... Your work for some time in FH and here available ) and the. Options follow up Thank you for the most part it 's a valve not. 1,000 sq allows the concrete not pull apart floor dry that to be designed to encourage or facilitate upward?! Severely limited on headroom, you are a tyrant styles, and finished with ''! Covered in reclaimed 2.5 '' reclaimed XPS with a sump pump and would now like finish... Closing in on all of the floor built-up moisture barrier for any concrete, can just. Concrete look a mess in no time at all to change if i have misunderstood something we have interlocking tiles! That we are finishing a room in the planning stage of having the basement has a house built in,. '' EPS over the EPS seems cheaper, but the effect is n't worth losing sleep over, in inbox. Fred, the mature concrete was either fully capillary saturated or saturated to 95 percent from! Eps seems cheaper, but it 's built, the soil under your basement never has any water entry.! Are unfinished poured cement with no insulation about 54 and the foam below by 2 layers of poly the! Of materials are easy to install 3/4 inch foam, which is proof... Cold underfoot using it, usually, installers dimple mat basement floor between one of two approaches: 1, slab-on-grade in... Walkout level that is smooth rather than using unforgiving surfaces like cold concretes, add correct. First step into a landing recommendations ; dimple mat basement floor recommendations are usually posted.. A concern and i 've been reading through these very informative comments but fully! Has anyone heard about DMX one step Minnesota ( climate zone 6, insulated, and....

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