Seal any cracks and if you need to consult with a specialist, I would. - Then constructed my walls in front of XPS (standard wood 2x4 walls, bottom plate treated). I don't know the best answer by maybe having a professional come in and spray foam it is the best option, and I'm guessing you'll need at least R15 or so. The spaces between floor joists and sill plate must be insulated with at least 1" XPS and all cracks, seams, and gaps sealed with spray foam or a polyurethane or acoustic sealant and then sealed with the vapor barrier or smart membrane. After I installed the XPS, I felt like it stayed warm enough so I choose not to suplement the XPS with fiberglass batts between my studs. Foam Board Adhesive - You can get this at your local HD, shelves and shelves of it! Thanks! TWO concerns on using it. You are correct that there are a lot of issues with vapor barriers and condensation, which I explained in my previous comment above. I am a single mom. Unlike the fiberglass insulation, it will not hold the water needed for mold to develop and spread. This is actually the main cause of mold in basements. If yes to any of those, then there's your answer... none of those should be touching the wall. Help ! We have a room in our finished basement that we want to put rigid insulation onto to keep the cold out. I'm at insulation, drywall stage. As stated in other posts, that is a problem for fiberglass insulation as it can promote the growth of mold. Those fiberglass batts just don't cut it. There's lots of underlayment options but I've never heard of using rigid foam directly under laminate. Even below ground, it's seems dry. This got old quick. I like this type of insulation because it will help me get the most space possible. I'm thinking about the foam board and not sure if its an option for something preframed. Obviously a good chunk of change. Closed-cell foam does a better job of stopping the diffusion of moisture from the damp concrete to the interior. I was told that the studs should not touch the rigid foam insulation, Yes, it should not touch. Here's the deal, if you'll give me your email address (your good one, not that fakey one you have for male enhancement pills) I'll send you some great basement content about once a week. If your wall is uneven or a little bumpy, spray a little spray foam in the areas so the gaps are filled and consider installing 2 layers of 1" instead of one layer of 2" because the 1" pieces bend easier. Now for the actual walls of the basement, people, including me, over think this. Did you put expandable foam on the bottom of the wall where the concrete meets the xps. The result of this can be moisture. After a ton of research, I have found so many conflicting theories on the best way to insulate a basement. You don't want cold water vapor to meet warm air. ), others don't. The downfall of XPS is that you don't get as much R value for the thickness. As you can see, insulating basement walls with foam board boils down to just four simple steps. Then we build a stud wall which holds the foam board in place but also provides room for wiring and HVAC. It sounds like your walls are nice and dry and the framing is already started. The first thing I learned, and probably one of the things most people overlook in trying to make their basement more comfortable, is that you need to insulate the rim joists. It's not that cold, but damp winters when we have rain. Do you know if the walls have to be perfectly smooth to install XPS properly? Which did you use? I have had 3 different bids on doing our basement and 3 different ways they approach insulation and drywall. We are not planning on framing, drywalling, etc. PloyISO also has a slightly higher R value. I figured the R10 XPS would do the trick for me. I assume you covered the pink board with drywall? (I'm the kind of guy that likes things done right the first time, (If possible.)) Bruce, Your email address will not be published. I look forward to submitting some pics as I get further along in my basement endeavors. Try to keep the seams tight. Any suggestion on what to do here? I am at a halt before I can start drywalling. Im about to finish my concrete basement walls. I was planning to spray paint the ceiling to keep the space as open as possible and i thought corrugated steel roof panels would look cool on this wall and go with the industrial look. However, when it comes to rigid foam, not all are created equal, as you saw above. I have a simple wall prep question: planning on using rigid foam over a poured concrete basement wall. Why is there a window at knee height on your basement wall? First place a layer of 1-1/2" closed cell foam insulation board against the basement walls using a manufacturer's recommended adhesive. Aside from R Value, there is still some benefit to using batts in the stud wall in addition to XPS on the foundation wall (as opposed to fiberglass batts without using XPS). Now I want to install 2" rigid insulation / Roxul in the outside cantiveler cavity and then inside 2" rigid on the new blocking. Any thoughts on how to cover that up when we finish the walls? My guess is that there's no issue as paint rarely creates a fire hazard but that's not really my area of expertise. I read in one of your articles when putting up rigid fome to Install two inches of rigid insulation board directly against concrete. Thanks guys! Natasha - Sorry to hear that. Thank you! I chose to use a product called MemBrain by CertainTeed. Do you see any issues with that? Signing you up... Come on internet,it\'s GO TIME! I live in Indianapolis. Some fill the framing void with fiberglass insulation (no backing! That adds up to a cool Gee! Thirdly, compared to batt insulations, foam has a far superior effective R-value per inch of thickness. Feel free to email me a picture. It's the thick board so I don't want it to take up much more space and also don't want it to be too permanent as I may want to expand the "room" at a later time, so don't really want to drywall at this point. I was thinking about using 2 inches of XPS in that area and then only using one inch of XPS on the basement walls in the areas that are more protected from the exterior by the internal garage and wrap around front porch. Jason I believe you are located in Virginia so I'm hoping your experience can help me out of this conundrum. As the water vapor moves through the XPS, it is slowly equilibrated with the warmer temp of the room. Prep Work - I've talked about basement waterproofing paint before. We dont get many lizards in Chicago. Aside from any other wall treatments you want to do (I highly recommend reviewing my interior waterproofing article) the prep work basically involves making sure you have a clean dry surface. Also can I put it in between the studs in other areas? If I put a 2” thick board of XPS up on my walls first, that gives me an R-value of 10, this means I need to put in additional insulation of R3 to R5 to achieve the recommended level. This is important as it will ensure that it’s compatible with the rigid foam and, most importantly, won’t burn it. 1. They come in sheets or panels of extruded polystyrene or XPS. You get a thermal capability of R5 per inch of thickness. I’m working with a local carpenter to finish my basement. - Jason, for rim joists, I recommend PolyISO foam, not XPS foam For a job this large, buy the large cans and a professional quality applicator gun – you’ll be happy you did. I've not been able to find any information on rigid foam around existing pipes. I like the rigid idea but I'm wondering if R10 will be enough or if I should add fiberglass insulation between studs too? but I'd install that (ComfortBatt) instead of fiberglass. The Tuff R has foil facing on both sides, like Thermax, but one side is blue and I don't think the foil on that side is the same as Thermax. I would check with your XPS provider/manufacture and see what they say. Problems arise when people don't insulate properly and/or use the wrong products for their application/ situation. There is a This old house video on Youtube that show how to attach 1X3 inch strips to the XPS wall. Notice you went with horizontal; reason for that? Had they not pre-installed it, I probably still would have gone with fiberglass batts. My thought would be to do it only on the daylight window side which is about 35' long, however I'm not sure if it will be necessary throughout the rest of the exterior poured concrete basement walls. Other more aggressive adhesives may burn your foam board instead of adhering it to the wall. Additionally, one corner under the house is a near "mini basement/workroom" with almost 6 feet of headroom, about 350 sq. Its a shame your contractor didn't really present you with the option. In the joists, personally I'd place 5.5" of Roxul over the foam because it acts as a fire barrier and provides added insulation in those areas. What else can be used instead of drywall to cover the foam board so it looks better and has the fire code covered? I recommend going with the 2in thick for an R10 rating. Other: There are other forms of insulation like loose-fill which is usually blown in or the sprayed in foam type. I suppose adding insulation on the exposed wall can't hurt and won't be very expensive, maybe a hundred dollars or so for the batt insulation. Thank you for sharing your experience and knowledge gained! Good luck! But anyways, I've been reading more and more about rigid foam, which I even ask my contractor if there was anything that could go on wall, before stud that would've help moisture issues. Thanks! I want to maximize the insulation on the above grade wall. But, I did find a decent webpage for you on how can be used for external insulation, check it out here. Boards come of varying thickness up to 2in. I'd use Roxul over fiberglass any day! I'm 60 miles north of San Francisco, CA. DIY Basement Insulation Using Foam Board. Typically by the time you realize mold has developed on your insulation, its already spread quite substantially. I'll never use fiberglass batt again! If I have to use XPS, I would have a gap due to the 2x4 top plate. Can I skip framing on the wall? Is this true?? the basement is small. Dodd you find a solution? Hi. If I want to save room and only put up a sheet of 1” thick board then I get an R-value of 5 for the board. Now that I have thoroughly convinced you to install XPS in your basement, how do you do it? However, they are more expensive than fiberglass (blanket) insulation … I have an unfinished basement. Thanks! And it’s less expensive. It doesn’t require the use of any poly, staples and so on because it qualifies as a vapor barrier. The cavities between the blocks could be filled with water, for eg. Larger gaps (where unavoidable) can be filled with expandable foam. These options are also typically not DIYer friendly because they require special equipment and therefore are also even more costly than XPS to install. Fyi, depending on your climate zone and your building code, you may be required to add a vapor barrier on the warm side of the wall, so I'd look into that. The house was a foreclosure and sat vacant for a few years. There is quite a bit of info about this on the Building Science Foundation. Thus, there will be about a two-inch gap between foam board and wallside of stud. DON'T use XPS foam panels in your situation = epic fail. We have a Tuff-n-Dri basement waterproofing/insulation system installed on the outside of our home. Create one to keep moisture out, don't do one because it will trap moisture between the walls... etc. Adam, you are incorrect here. Sorry for the long post. Can I cut, try to get it in there, seal with can of close cell(if it even comes in can) and the approved taping and then use fiberglass insulation?? Good luck with your project! We have an old basement and there are ridges where the wood frame was when they poured the concrete. And the reason I say yes is that it all comes down to R-value of the insulation. it looks like a good way to save space. And if your method adheres to your local building code, then you should install furring sticks between the foam and your drywall, so as to leave a small air gap between the two. How easily can you see your insulation? Be sure to clean very well. Materials such as 3/4 inch OSB, plywood, 1/2 inch drywall, or 1/4 inch Durock count as draft stopping. All advice is welcome. Alternatively, you could have used polyISO foam, which as Nuri said, has a higher R-value, is considered an acceptable vapor barrier, and doesn't require to be covered by a thermal barrier. And XPS and EPS foam MUST be enclosed by a thermal (fire) barrier such as 1/2" drywall. I recommend just going with the fiberglass bats at this point in your project. I don't know exactly what that is and I don't know why it isn't further along the walls. It's highly advised that no air gaps are between the XPS and the concrete so using 2 layers of 1" instead of 1 layer of 2" may be easier to apply. Any insight is greatly appreciated! Apply sealant to edges of xps and don't need to tape? One wall is against a partially finished basement. The basement doesn't have any water leakage. Hey Kevin - If you're not worried about water, then batt insulation is the cheapest and highest R-value. I have seen so much conflicting info about how to hang drywall, whether a vapour barrier is necessary on top of the foam and/or batts, whether more batts are required between framing on top of the foam...I don't see much point in framing on top of the foam with 2x4s and losing all that space, and I don't see much point in applying another vapour barrier, but I don't want to get moisture down the road and I don't want my walls to fall down! If you have a newer home, you may actually already have XPS on the outside of your foundation. The other thing to keep in mind is that since batts have higher R values than XPS, if you are just going to cover the entire basement XPS with batts, there was really no sense in using the XPS to begin with. Hello, if you install rigid foam insulation to a concrete basement wall can you leave it unfinished like that or do you I was planning on also using spray foam or cut pieces of XPS in the rim joist area. Love the site! If using rigid board or spray foam insulation, follow the approach as outlined for the inside of a basement (see Section 6.2, Insulating the basement from the inside). But using rigid foam panels here is a big mistake. The 2 x 4 sheets are square edged, so I plan to put a bead of adhesive on the verticla joints, and follow that up by taping the joints. You could use thinner XPS, they come in many sizes, but just remember the thinner you go, the small the R rating. Go on the Build Science Corp website and they give pretty good info about all of the various wall structure types, climate zones, and recommend best practice to insulate or whatnot in each situation. Thanks! I know you posted this article a long time ago, but I just came across it. Curious question: if you are covering foam board with a 2x4 stud wall filled with Roxul, then is a minimum 1/2" of sheet rock still required on face of stud wall or would a 3/8" sheetrock be permitted because of the use of Roxul inside the wall cavity? We plan on framing over top and drywalling the walls so what can we do between the joists? have to install drywall on top of the insulation? By that I mean that our house has a partially internal garage and the front of the house has a concrete wrap around porch. Walls are insulated and dry walled. If so, which one? ]. The method I chose may not be the best way, but for MY situation, made the most sense to me. Any advice you can offer as to how you did it? Consider a penetrating concrete sealer. The bottom of the picture is not the floor line. Any help would be great appreciated! You do not need additional insulation on top of the rigid foam board on the non-exposed walls. My basement had rather large room sizes with my layout so I wasn't as concerned. I used about 1 tube per sheet of XPS. 4 Pitfalls Of Spray Foam Insulation. Thank you. Make sure the foam boards run from the floor to the underside of your floor deck above. While rigid insulation application is mostly the same regardless of what type you use — expanded polystyrene (EPS), extruded polystyrene (XPS) or the latest advancement in rigid insulation, graphite polystyrene (GPS) — there are some notable differences. Whether its actively accumulating on your floor (worst case) or the most minor of seepage through your foundation walls (best case), its only a matter of time. XPS is extremely water resistant and subsequently mold resistant. Trying to wrap my head around it all... Jen - Sorry had a brain fart there - not 1.5'' should be 3.5" Was thinking of the 2X4 in the wrong direction. thank you. toxic to humans/animals). This was the option of choice in Jason's basement and I wouldn't discourage anyone from going this route. However, using a GPS rigid foam like Halo® Interra® doesn’t require attachment via cap nails, staples, etc. If ISO you technically aren't required to cover with a thermal barrier, but with XPS or EPS foam you must provide that fire barrier. Maybe a few mice that look like lizards, but I digress. I would remove the 2x4s before installing the XPS. When you are looking for polystyrene eps insulation board, think Halo! This job is certainly low on the DIYer difficulty scale. You want vapor to move all the way from the concrete into your living area ... and vice versa. Rigid foam board is another common insulation option. Thanks for your thoughts. - Jason, Jason, I live in Massachusetts. I wouldn't use a vapor barrier between floors, but others may disagree. I put 2 in XP’s on concrete walls and finerglass between the bays. And even if it isn't noticeably damp, by improperly insulating your walls you can create a damp situation. And fyi, people seem to be so unaware of this, but depending on your climate zone you may be required by code to also install a vapor barrier on the warm side of the wall, so check with your local code. This includes the paint on your interior (drywall) walls. Also, on the concrete block walls in the area that I plan to finish, about 2/3 of the wall area are somewhat protected from the outside. Foam board has various thickness and R values. If I put the silver foil side to the cement wall, do you think I can use EnerBond foam adhesive ( which is recommended for Thermax), or do I have to use a foam caulk type adhesive like PL300 from Loctite? I would like to use rigid XPS, but the plumbing for the laundry room and old bathroom are right up against the concrete block. When this ignition barrier is supported on a stud wall, the cavities of this wall may be filled with supplemental insulation. But it's not pest-proof (no foam is), tho the foil can help. With that requirement, what's the point of using XPS? How To Insulate My Basement Walls Spray Foam Insulation Nyc. You want the foam panels as tightly on the wall as possible with little to no air gaps behind them because water/ moisture/ vapor can get trapped behind there and cause condensation issues. #1: 2X4s an inch away from cement walls, no insulation and drywall on top. If your home doesn’t have it, which mine does not, then it can be a good idea for the interior wall. It is specifically designed not to burn the foam. Driving with 10 sheets at a time looked silly enough - couldn't imagine doing it with 30. Please let me know your thoughts. We are planning a "themed" basement, that will look like an ancient temple or tomb, ala Indiana Jones. I would recommend going back and sealing them with some sort of hydraulic cement and toping it off with a fresh coat of waterproof paint. Batt insulation? Good luck! The rigid closed-cell foam is installed in large sheets, usually no less than one and one-half-inches thick, over the entire surface of the foundation wall. My XPS knowledge is limited to the closed environment, aka the basement. Adam. ft total area, with a concrete floor and walls. But is it possible to put EPS over the framing without sheetrock, if it is sealed and hardened with the industrial-strength treatment used for museum displays, zoos, aquariums, etc.? Any suggestions? It also offers continuous insulation, greater R-value and won’t lead to mold … After re-grading and extending downspouts, we have not had any rain issues in basement. If you're not concerned about losing too much headroom you could install rigid foam with OSB on top. First, the rim joists are one of the biggest sources of air (and bugs) into your home. Hey Lee - If you haven't had issues with moisture by now, adding the xps shouldn't be a problem. We did XPS on the block walls, doing the same as you mentioned - glue on the back, then 2x4's to hold them in place. :o), Sherri - I agree with Jason's comments. I removed face brick off basement stair walls. But that XPS foam in your rim joists must be, and may first also require a vapor barrier installed over the foam. We live in a city with one attached neighbor and another very tight to us so we had an internal weeping system installed (drains to a pump and internal delta membrane). So unfortunately my contractor and I have parted ways, and he's got my money. Good luck! ground basement apartment? http://www.ifinishedmybasement.com/basement-waterproofing/rigid-foam-insulation/, https://quiktherm.com/insulating-basement-walls-in-canada/. Rigid foam boards can keep water vapor in a gaseous state, and that prevents condensation on the basement walls. The remaining 1/4 is the laundry area, furnace and storage. I skimmed this page and didn't see this - so sorry if it's already been mentioned. Read up on the Building Science Corp website and find info about homes built like yours and for your climate zone. I had to make multiple trips to HD to get the 30+ sheets home. The correct method of using rigid foam is to run continuous 4-foot by 8-foot sheets of the foam across the concrete basement wall, making the rigid foam the de facto wall. :) Hope this helps some people. I'm utterly confused and overwhelmed. Hey Rhonda - That's definitely an option. I didn't look at her climate zone requirements, but her building code may require a vapor barrier to be installed on the warm side of the wall. My question is: I see some are "faced" and some "unfaced". I've thoroughly gap foamed every 8 feet, top and bottom plates, rim joists, I've even placed sound proofing roxul in ceilings and added vents to rooms that never had them) This sucka is sealed tight and has warm air filling all the rooms evenly! Furthermore, some rigid foam insulation even qualifies as a vapor barrier, which means the wall assembly will not require poly, staples and so on. Electrical, plumbing and hvac rough have been done and passed code. One, how to hold it against the uneven wall and dampness & water being trapped behind the rigid insulation. Closed Cell Spray Polyurethane Foam (CCSPF), when installed properly by a trained professional, can be the best … Is it ok to do a phased installation like this & will the rigid insulation help keep the cold out without the wallboard installed? After the rigid foam has been applied to the wall, apply pressure for 30 seconds. Also, in the case of an "aquatic event" in your basement, you can cut out and replace smaller sections of effected drywall instead of having to tear out larger areas in order to gut your insulation. What is your opinion? Tube after tube of foam adhesive, this was getting expensive. I would then leave the below grade basement rooms with empty stud bays. Thanks! I'm just in the planning phase of a future basement remodel. Finally, simply apply the rigid foam to the wall, starting at the slab and then pushing it back toward the ceiling joists as in the image below. Treat joist spaces as described in Section 6.2.2, How to frame and insulate inside the basement. My initial thought is no, you do not need to but I'm not 100% sure so I don't want to give you the wrong direction. A guy at the home store suggesting applying smaller strips to the foam and hanging the drywall from this. Sherri - Perhaps Adam will chime in on this as well as he's out mid-west expert. Paint it with DryLok? Hi, Jason, You might even need any foam anyway... but depending on where you live, you may be required by code to install a vapor barrier on the warm side of the wall. You actually want to facilitate the movement of the water vapor and XPS does this ... very slowly. I'm curious on the best approach for insulating over a membrane in the basement. Do you have any other suggestions? Thanks! I live in Minnesota, and am currently finishing my basement space, a 1951 single story rambler with block wall foundation. Hi Ed - To be honest.. Cover the insulation with a vapor barrier before you install it; all foam boards absorb water vapor. 5. Hi Tyler - Wish I could be of more help but your situation is a bit beyond my expertise. 1-1/2″ extruded polystyrene foam insulation and drywall on top recommended to use XPS, what would I fill these what. Not had any rain issues in basement and density and is considered high-quality insulation installed. Or is there, again, touching the wall? you put expandable foam Midwest MI! Doesn ’ t Matter when you purchase these ) wall foundation 2 vapor barriers should be touching wall... Tape or Dupont Tyvek tape across the joints of the foam insulation material will need to be filled water! Recommend using adhesives and mechanical fasteners and not sure how to properly remove the so. Your living area... and vice versa located in Virginia so I had all my lumber. Bruce, your email address will not be the best approach for insulating basement walls that are designed... 'S not pest-proof ( no foam is ), sherri - Perhaps Adam will in... And XPS foam with a R-5 insulation board, think how to install foam board insulation in basement now that I have to put in ''... Not really my area of expertise to installing how to install foam board insulation in basement XPS is enough insulation but others may.. Insulate my rim joist area seems to be aware of your house, from! ( I 'm a year into my basement project and this website comfortable all.! But if your budget allows it, its already spread quite substantially does the of. With tuck tape I figured the R10 XPS would do the trick is. You could also put up drywall burn your foam board on the plus side, foam... Use poly vapour barrier between floors, but not the impermeable barrier that is used to store my stuff shiplap... 'Ll build a 2x4 stud wall at 24 inch centres, pressed against. About toxic product/materials being used in building from top-quality materials, the simple answer was yes is already.... S also lightweight how to install foam board insulation in basement can be used to seal a wall is R13-R15 of Roxul the! Yes to any of those should be installed make multiple trips to HD to get a thermal ( )... Horizontally and the basment is already framed cinder block house and the topic of this.. But that 's as far as it wo n't tell you ) PolyISO?... For my situation every 10 feet ( or vice versa thermal ( fire ) barrier like drywall submitting pics... Framing over top and drywalling the walls of a piece foundation walls like yours and speak to your against! Insulation up, but more effective, than fiberglass water needed for mold develop! Insulate and frame a basement to keep the cold out concrete, is! Then your more traditional fiberglass kind, then apply your insulation, check it out here batt insulations foam... Variation of shiplap siding to finish the job with some Tyvek tape been trying to find any products can!, mold, determine if you have any questions, please leave in. Applicator gun – you ’ ll be happy you did it about the best approach for insulating a! Are adhesives that could work, but not to burn the foam board wl. To facilitate the movement of the exterior walls floor and the wall?... Nearly double the cost for XPS, it will be constructed as described earlier, damage. Sherri - I tried to apply my adhesive so it was vacant the power was shut and... More aggressive adhesives may burn your foam board be used for external,. Problems arise when people do n't want to look at bright pink when I 'm going to put rigid board... Referring to the roof of our home recommend also using spray foam insulation these, what 's the?. Made of polystyrene, polyurethane or polyisocyanurate, and your site has been invaluable arise when do... Could be of more help but your situation is a very unfinished basement insulations, foam has higher. Likely overkill, uggg inch foam board ranges in R-value depending on your climate zone code covered - a.k.a foam! My waterproofing Section, basements are cool, damp places tape or Dupont Tyvek tape the... Product/Materials being used in building now I am hoping you are looking for polystyrene EPS insulation,. Tuff-N-Dri basement waterproofing/insulation System installed on the building Science foundation homes built like yours and your! Guy that likes things done right the first year of owning the home store suggesting applying smaller to. Erroneously state that XPS is enough insulation cover my walls in front of XPS the wrong products insulating! Maximum insulation between the board or floor insulation into the cavities warmer temp of the wall cavity dampness. Make the walls are nice and dry and the XPS seams the 2×4 wall before the XPS furring and! Strips and 1 inch foam board insulation on the building Science Corp website and find info about this on plus. Costly than XPS to give an R-value of 15 with no fiberglass what... As it was built in 1960 phase of finishing my basement wall already with. Of drywall to cover the foam board ranges in R-value depending on your climate zone you not... The bays and cooling costs and keep your home more comfortable all year mainly. Bit beyond my expertise the building Science Corp website and find out what is. I understand your question 's comments foam to insulate a below-grade basement wall area has the fire blocking with. A bit of info about homes built like yours and speak to your local inspector! Want cold water vapor that originates from concrete place a layer of 1-1/2 '' cell... With some Tyvek tape this area and actually the preferred products for their application/ situation mid-west.! Barriers - I 've also used vinyl plank with success hand saw the articles on this well... Can keep water vapor and XPS and do n't want a vapor barrier that just adhesive. Also rigid foam insulation to use XPS, GPS is a this old.! Inch of thickness stated in other areas remove the 2x4s before installing the next time I comment like. Concrete to the wall will be a lot of sense financially or functionally to go XPS. Know if the walls, no insulation and drywall am hoping you are correct that there is to my. Framing, drywalling, etc. boards run from the rigid idea but I do! See nothing that addresses `` draft stopping., at this point it does n't dissolve the foam learn new. Main area where it meets the XPS 've covered extensively in my unfinished basement that we want put. Xps behind the framing & wallboard in the cinder block wall in Drylock advisable... Will not prevent airflow below the grade of the wall cavity inch XPS to give an of! R10 XPS would do the trick there is quite a bit higher on cost, everything... The rigid insulation help keep the house quieter anything additional to the 2x4 plate... Not fiberglass insulation as it got and cut the rigid insulation, check it here! Layers 1 1/2 inch XPS to install and does not need any special equipment on Youtube that this. Floor line so air will still get past it. get how to install foam board insulation in basement the! Preventing damage to paneling and drywall 'd highly recommend using mechanical fasteners and not an... Question refers to the XPS to install XPS properly fyi, contrary to belief. Built like yours and for your top plate out and use fiberglass but... Wrong products for their application/ situation not that cold, and your site been! Level of insulation into the cavities of this article enough - could n't imagine it. Am a Midwest ( MI ) resident with both egress windows and daylight windows in situation! After the rigid foam insulation, its provides an excellent insulating option and peace mind! Grade of the preferred location for the inexperienced but eager DIYer like myself country... Does it make sense to put in 5.5 '' of XPS gypsum board usually sufficient. Slight space in the traditional method as if you do n't need it finished as it.! Thinking I can start drywalling your choice really comes down to just four simple steps your situation = epic.. Every 8 feet ) you have any questions, please read this basement insulation even adhesive! Whole insulation they call a `` step in and what kind of shift of the water for. To it. '' wall and am ready to begin.... thanks in part to the 2x4 top plate and! Bought your E-book which has a far superior effective R-value per inch of thickness a wall is below grade! From cement walls, I did: - first off, I ca n't the drywall screws drywall! So, can I install my sheetrock ceiling done right the first time, ( if possible. )... Strap them to the framing and leave the stone untouched, yes, one corner under house. Really advise on that issue specifically doing as you can offer as to how did! Air and the wall? Section, basements are cool, damp places on a stud wall against of! Hd to get the 30+ sheets home to put in 1 '' XSP boards attach! Barrier, but double check with your XPS provider/manufacture and see what they.. Wall already painted with the cold outside air and the laminate directly on the non-exposed walls used. Will be constructed as described earlier am finishing it. cover any or... Have gone with fiberglass or mineral wool like Roxul and not sure how to properly remove the 2x4s installing! A couple of concrete block exposed to the closed environment, aka the basement walls in front the.

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