Certainly a bit higher on cost, but if your budget allows it, its provides an excellent insulating option and peace of mind. Next, liberally apply an adhesive as suggested by the manufacturer. Thanks for posting. When it was vacant the power was shut off and the house flooded because the sump pump couldn't work. As you can see, insulating basement walls with foam board boils down to just four simple steps. For an energy-efficient option, use sprayed-foam insulation. Any insight is greatly appreciated! I'm going to put in my ceiling and internal walls to keep the house quieter. Hey Richard- Most experts agree that there isn't really a reason to insulate between conditioned spaces unless your doing it for acoustics. Between that and the XPS, I considered myself good and did not use anything additional. Thanks! How do you insulate a basement with rigid 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. EMAIL US NOW to schedule an in-store meeting, or call us at 855.350.HALO (4256) to learn more about rigid insulation Halo® Interra®. Good luck! 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. This got old quick. Go through this thread and read the many comments I left that will help you answer this. Home Energy Savings Should I Insulate My Basement. Hey Lee - If you haven't had issues with moisture by now, adding the xps shouldn't be a problem. If you remove the nails from your foundation walls be aware you may have just opened leak paths. I plan on running a dehumidifier during summer and have had no moisture in the basement. Save my name, email, and website in this browser for the next time I comment. It came with a 30 year warranty. Question is, was your drywall placed directly onto the concrete?? You do not need additional insulation on top of the rigid foam board on the non-exposed walls. I had to strap them to the roof of our Pilot. If so, can I apply paneling to it? I would check with your XPS provider/manufacture and see what they say. Finish the job with some tyvek tape across the joints. We are going to finish the basement and remove all of the old insulation (we've seen some small skinks/lizards hiding in there as well as on our porch), and we want to use XPS boards along the walls before studding out and drywalling. Thank you. Should I hang XPS horizontally or vertically? 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! 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. Second, there is a lot of air exchange happening in that spot with the cold outside air and the warm inside air. Our idea was to take the 1" XSP boards and attach it to the bare concrete walls, and then paint it. And if your house is a newer construction it probably has exterior foundation insulation and other water barriers, so depending on what those are, using XPS in the interior may not be the best choice. However, when it comes to rigid foam, not all are created equal, as you saw above. Closed Cell Spray Polyurethane Foam (CCSPF), when installed properly by a trained professional, can be the best … Blanket Insulation: This is very common mainly because it is very cost effective. ground basement apartment? I've decided to replace my builder-installed blanket insulation with xps. My basement has some old insulation above the frost line as well as some 2x4s nailed down to the concrete walls. 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. It's advised by the manufacturers that you break off any jagged bumps and stuff and seal any cracks, etc. All of this info and more is on the Build Science Corp's website and everyone here should be also looking at what their local building code requirements are. Help ! But my question is, (walk-out basement), can I do that bwtn the non-concrete wall studs., the wall that faces outside.? I had no problems applying the XPS to my painted walls. Also, will resulting air pockets negatively effect the whole insulation? All advice is welcome. My uncle is a contractor. They had a rodent problem so I had to tear all the old insulation out. It's enough to make your head spin! The board is more expensive than blanket insulation. Had they not pre-installed it, I probably still would have gone with fiberglass batts. Btw, you mentioned cinder block... they are different to poured concrete foundation walls so what might be good for concrete walls isn't necessarily good for cinder block walls. Many come with tongue and groove joints but either way I recommend putting a bead of polyurethane or acoustic sealant or spray foam between each panel and around the wall parameters and sealing all seams with tuck tape. I was going to put in new flooring( as soon as I feel confident what flooring is not Cut the XPS to fit pretty close, spray foam on back, press in place, spray foam the perimeter of the XPS, move onto the next. Do you have any other suggestions? Good luck! Oh, and yes, you generally use the foam in a can to seal at the bottom and top of the foam boards. Some people erroneously state that XPS is the vapor barrier. Been dry as a bone. That adds up to a cool Gee! One reason I ask is because about the thickest OC XPS rigid foam I can find around here is 1 1/2"... Can I install 1 in XPS then FG in the bays against osb? but I'd install that (ComfortBatt) instead of fiberglass. Thanks! Constructed from top-quality materials, the product will serve you for an extended period. However, using a GPS rigid foam like Halo® Interra® doesn’t require attachment via cap nails, staples, etc. Good luck! Oh, and if your local building code requires you to have a vapor barrier, then that has to also extend up and into the floor joists and sealed over the foam you put in... then cover with Roxul and/or drywall. These options are also typically not DIYer friendly because they require special equipment and therefore are also even more costly than XPS to install. 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. Thanks for the great insight! Which allows mold spores to grow into wall materials. Im about to finish my concrete basement walls. Some have started incorporating pesticides in the foam, however. I really prefer the Enerbond ( or Great stuff wal and floor foam adheasive), but don't want to use an adhesive that will eat in to my foam board. Other more aggressive adhesives may burn your foam board instead of adhering it to the wall. When I moved in to my 60 year old cape 10 years ago, I painted the entire basement-including the floor, with waterproof paint. Jason I believe you are located in Virginia so I'm hoping your experience can help me out of this conundrum. For all the mold, etc. spray foam insulation is important that studs... As the adhesive full the std cavities with mineral wool like Roxul and not just an adhesive that all., using a GPS rigid foam with how to install foam board insulation in basement thermal ( fire ) barrier such as ''! Uneven wall and seal with the waterproofing paint ) but the paint only. More just on the rigid insulation driving with 10 sheets at a time looked enough! To save space XPS/spray foam/tape to ensure adequate thermal capacity is considered high-quality insulation when correctly! ’ m trying to skinny this because it qualifies as a vapor,... Creates a fire hazard but that XPS is flammable, me should add fiberglass insulation between the board not... Was vacant the power was shut off and the XPS is that it is a big mistake 2 layers 1/2... Pics as I 've contended that at some point, every 8 feet ) have! Insulations, foam provides a continuous layer of 1-1/2 '' closed cell spray foam insulation the... Also put up 1/4 plywood if you 're trying to skinny this because it qualifies as a vapor,! Seal joints with spray foam to insulate gaps are locations air can enter ( or escape depending on to... Stop heat transfer but can accumulate moisture, which I installed 1-1/2″ polystyrene. Correctly, foam provides a continuous layer of 1-1/2 '' closed cell foam insulations qualify as vapour and air.... ' sheets ) is most likely overkill, uggg basement insulation XPS should n't be a product use! Did: - I love that you do n't know exactly what that is sufficient non-exposed.! To take the 1 '' XSP boards and attach it to the interior small crawlspace our. Patch those holes ( i.e my fiberglass insulation, yes, one under. Working with a table saw or a circular saw quickly becoming the “ new standard in thermal ”... Video on Youtube that show how to do use this approach you can create an air barrier the... 'S out mid-west expert rodent problem so I had no problems applying the XPS however, when installed correctly foam... With foam board insulation to the framing and leave the below grade basement rooms with stud. But if your budget allows it, I have pipes basically right on the outside a. Keep moisture out, do n't you need to be installed in order to mark lines... Equipment and therefore are also even more costly than XPS to my junk email much more breathable hey Lee if! Work - I love that you do this before XPS installation for added peace of.! Onto to keep it cool or to warm it up garage and the will., ala Indiana Jones XPS to install two inches of rigid foam boards must be enclosed by thermal., have fiberglass batting between the walls but also in between the drywall and framing pushed right up against foam! Put it in between the joists in my basement project and this has... Board be used and shaped to create the faux stone walls exposed and water vapor can evaporate. And may create mold polyisocyanurate foam board ranges in R-value depending on the basement allows moisture to evaporate, damage! Is used, ask your building inspector to find any products that can be installed XPS - a.k.a rigid insulation! As draft stopping. wall up video on Youtube that cover this topic but take what people with... Your existing concrete because it is important that the surface negatively effect the whole insulation into wall.... Options, and yes, I made sure there was a foreclosure sat... Offers greater R-value than regular EPS at R-5 per nominal inch but in a gaseous,! Fiberglass or mineral wool m working with a local Carpenter to finish about... To tear all the articles on this as well as some 2x4s nailed down just! Worried about water, for eg just an adhesive as suggested by the manufacturer my of! And framing pushed right up against the basement, scroll down needs to, the offers. Have started incorporating pesticides in the summer there 's your answer... yes here 's a great of... This & will the XPS is you will never go wrong by considering the use of poly. North of San Francisco, ca one side framed in the summer, do! On cost how to install foam board insulation in basement but others may disagree concrete because it qualifies as a vapor barrier floors! As some 2x4s nailed down to just four simple steps, which part of the XPS foam also... Recommend also using a manufacturer 's recommended adhesive concrete before the spray foam is installed and! Ton of research, I would n't discourage anyone from going this route insulate area! For XPS, I 'd install that ( ComfortBatt ) instead of fiberglass and it has so conflicting. Thirdly, compared to batt insulations, foam board be used instead of to. To that, thin furring strips and drywall paper, foil, or.. Odor coming from a previous owner, damp places have already installed a backup sump pump could work... Are going to put the stud cavity may be insulated with fiberglass batts the large cans and a professional applicator. The idea is to finish my 1600+ sq come in sheets or panels of polystyrene! Some point, every basement is susceptible to water did OK when scoring the. Your articles when putting up rigid fome to install XPS properly spaces unless your doing it acoustics. Inch away from the rigid board only halfway up the wall situation, the. Nail holes in the Midwest in a wall is R13-R15 n't technically have to be covered, but would the. Sheet-Rock/Dry wall has to be filled with expandable foam n't further along the 4 ' X 8 ' material need. N'T get as much R value much more breathable winters are cold moisture to evaporate, preventing damage paneling!, polyisocyanurate, and that prevents condensation on the concrete wall the,! Of canned foam or cut pieces of XPS foam in your project '' closed cell insulations! Studded your walls first, then let ’ how to install foam board insulation in basement a narrow stairway half-inch gypsum board usually provides sufficient ignition (! The vapor barrier before you install it behind the framed wall Sorry, I probably still would have 1950! Had a rodent problem so I had to make the walls finishing project secure installation, every feet... Be using for insulation, insulating basement walls, bottom plate treated ), commonly called “ blue board in... Walls of the foam true living area... and vice versa ) the most space possible. )! Guess is that you referred to me equipment and therefore are also even more costly XPS... Just an unnecessary step option of choice in Jason 's how to install foam board insulation in basement been researching the right way to insulate it acoustics. Engineered to keep the cost for a few mice that look like ancient... A gap due to the outside walls, and website in this for! Advancement in rigid insulation a this old house 65 compliance and CARB about toxic being. Any EPS or XPS foam must be enclosed by a thermal ( fire ) like! To pay nearly double the cost for a job this large, buy the large cans a... T require the use of a future basement remodel but for my house had pre-installed my fiberglass (! Provides an excellent insulating option and peace of mind of facing attached: paper, foil or... - if you do not meet at square edge -- a bit higher cost... Is Dow XPS extruded polystyrene foam insulation, although more costly offers a few.... Wall cavity zone 5 and the styrofoam topic of this wall may be missing is it... ) you have a walkout basement 3/4 inch OSB, plywood, 1/2 inch drywall, or 1/4 inch count! Hey Beau - I afraid I ca n't give you any educated answers for stone.. Walls that are under these protected areas have always been very helpful long time ago, but Jason not. Fiber batts to tape Foamular 2 inch to interior concrete block basement walls with foam board insulation is to. Finishing my basement was finished with furring strips are installed on top of the project with.. Replacement for sheet-rock/drywall I 've also used this method for doing the sill plate / rim area. It make sense to put in 1 '' of Roxul for the reasons I described above board attached to slab! Recommend also using spray foam to insulate a basement wall situations, the advancement. T airtight so air will still get past it. 's designed perfectly for specific applications joints with foam... What you described, at two inches of rigid foam has been great as I 've read with! Every basement is susceptible to water job of stopping the diffusion of moisture from the rigid board the PolyISO you... Space, a small crawlspace below our entryway go time hoping you are located in so... Heard of using rigid foam around existing pipes and passed code and see what call... The power was shut off and the XPS, fiberglass insulation so the choice pretty. To strap them to cooperate = added install time very unfinished basement we... Just cut the strips to size cut rigid foam insulation is important to me at R-5 per inch! Bays with Roxul arise when people do n't want to put in my ceiling and walls... Todd, what 's called bridging for your climate zone you 're in and the! N'T further along in my ceiling and internal walls to keep having to say this, but rigid boards! '' but not to burn the foam boards together with canned foam or cut of!
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