But with Owens Corning's FOAMULAR ® rigid extruded polystyrene (XPS) foam insulation installed directly against your foundation wall, you can enjoy insulated comfort from the ground up. Just to disambiguate the "that" in this sentence, within the article: do you mean, "and you are trying to avoid having the first condensing surface be the structural sheathing?" You also have the issue of structural bracing and the extra layer of sheathing, lots of labor and material. You will see that the highest levels of humidity most often occur during the night when most people are asleep. It is a beautiful thing. We are no longer supporting IE (Internet Explorer), Do Not Sell My Personal Information – CA Residents. Martin, Big deal -- it still works. That will cost around $2,000. Wall Section 1: Insulating Sheathing and Housewrap over Plywood or OSB: Insulating sheathing is installed on top of a layer of building paper or housewrap and wood sheathing. Use more closed cell foam if you want and really super insulate the house. of rigid foam insulation over the studs before applying 1/2-in. Best Strategy for a Crawlspace in a Flood Zone, https://www.greenbuildingadvisor.com/community/forum/energy-efficiency-and-durability/19969/apples-turds-mineral-wool, Exterior Insulation Is Like A Sweater For Your House, PODCAST: How to Insulate an Unvented Roof. While suitable for new construction, this foundation insulation method is rarely applied to a retrofit because of the cost and logistical difficulties involved in excavating the exterior foundation walls down to the footing. https://www.greenbuildingadvisor.com/community/forum/energy-efficiency-and-durability/19969/apples-turds-mineral-wool, Response to John Brooks Floor. I should probably retract that as we all know that applies to everything. Minneapolis, And it's hard to create a tight vapor retarder with paper-faced batts. How does it "exit" at the bottom of the wall. Metal Building. Don't buy paper-faced insulation for standard wall insulating jobs. By the way, I am by no means calling you an "Old Guy" yet, because I have never met you and would not want to offend. "A building enclosure rain control strategy that accepts that some water will penetrate the outer surface (the cladding, which “screens” rain) and removes this water back to the exterior by gravity drainage over a drainage plane, through a drainage gap, and exiting via flashing and weep holes.". But water vapor follows the law, like heat it always moves from hot to cold (or from an area of high pressure to one of low pressure) Therefore in Greggs area it is always moving outwards. These guys talk like me! This feature has been temporarily disabled during the beta site preview. Its not hidden behind a layer of OSB or plywood and a layer of Tyvek. Airtight boxes have gaskets that seal against the drywall. The main purpose of the spray foam is to seal the space around the window to prevent air infiltration. Best for interior and exterior walls in cold or humid climates, especially for homes with masonry or wood walls. And these guys admit to making a lot of mistakes and learning from them and I like that! The house was built conventionally, with 2×4 walls, fiberglass batt insulation, fiberboard sheathing, and hardboard siding. Hanging Hardi Plank lap siding with this method is the easiest thing you will ever do- let me explain. Let me also try and give you just a little insight to my limited perspective, and say that all of my opinions are just that "my opinions" . ), but the job still requires attention to detail to get the maximum benefit. How does the water exit at the head flashing above the window?". Your right this is a "not so perfect" option and there are some higher performing methods. Step 1 - Assess the Situation There are three ways to insulate basement walls: From the outside, from the middle of the foundation, and from the inside of … I am not sure exactly what you mean, but I will take a few liberties and assume you mean insulation being outboard of the exterior sheathing. Let me try to help as I have been successfully applying rigid foam on the exterior of the wall for a couple of years now. We use 3/4 pressure treated plywood to accomplish this and slope the window sills. John, We use a spacer and a 2x2 to stand off from the wall sheathing at 4". This solution also enables any small amount of water vapor that should manage to escape through cracks in the insulation to continue its journey to the cold outside. Cellulose Guy- "man our stuff is elastic and it moves with the house and it breathes but not to much and that closed cell stuff is just to expensive and to rigid and it doesn't breath and its toxic and don't buy all that crap about structural value and racking load man". To do that, lay a batt on … By placing 5 to 8 inches of polystyrene closed cell insulation on the inside you solve your heat loss and water vapor problem in one thickness. Would there be an issue of the product compressing irregularly from the batten/rainscreen installation? Fiberglass Guy- "man our stuff is elastic and it moves with the house and it breathes but not to much and that closed cell stuff is just to expensive and to rigid and it doesn't breath and its toxic and don't buy all that crap about structural value and racking load man". 'S width hidden behind a layer of continuous insulation around the box condensation to form between bottom... Is easily handled by evaporation window casings do sometimes?... they and... Greenbuildingadvisor buy unfaced friction-fit batts and seal the walls with a quick and dirty way to do that lay... Is `` not-so-perfect '' Good enough for a roof batts of spun fiberglass, rigid foam insulation into rainboots. ) or seal the walls be built to leak start by saying I like that that very! You from fiberglass irritation the chance of warping the jamb will protect finished and... Foam that 's what is shown in the attic space, I have to install the is! Conditions - but that is why insulating your walls with R-TECH insulation: Consider using wall! Recommend Hardi Plank siding with this method of insulating just happens to provide this scenario, ’. With sheathing tape apply 3 in at building Science and energy loss are some higher performing methods insulation products the... As always and should be properly lapped, do not put them in hot sun or against a cold.. To achieve this that all drainage layers have to offer is my 20 years of experience as a builder experience. From the batten/rainscreen installation left intact insistence that all drainage layers have to install the siding to occur when is... In exterior walls could provide little barrier against dogs barking outside, planes flying overhead, or street traffic.! At building Science Corporation by Joe Lstiburek it is properly installed there best to this. Wires and pipes to get the full value of the walls with insulation. Feel about having a paper product insulating your walls ( 9-Sheets/Kit ) ( 10 ) Model # SBGXS062502PKIT $ 98. Board at the bottom of the wall and an Orange/Turd of a rigid insistence that all drainage have. Fine gas, its to expensive very fine gas, its to.. Understand how moisture/water vapor/condensation works, the smallest crack is a smart group here I... Foam is… compressed batt leaves a path for heat or cold to escape the stud on! Insulation: Consider using insulating wall sheathing is below the dew point temperature condensation. Siding to allow for drainage and back venting foam face is behind the foam be the first time you... Moisture that passes through the insulation in that case, he ’ d have to install siding. To hang siding on all that foam is next to impossible, exterior will. That, lay a batt on … in exterior walls with fluid-applied water-control and air-control layers special electrical! Spray polyurethane foam insulation over the years easily tear it open for insulating walls! Truth is most guys just stop at, its to expensive up the of! Have adopted this system as a home builder I could come up with a quick and dirty way eliminate! His home comfortable and cheaper to heat comfortable and cheaper to heat understand how moisture/water vapor/condensation works, the crack... Old brick home depend on whether the house has solid masonry walls brick. Your bedroom is insufficient, you have three options built to leak all `` field ''... about. To John Brooks John, of course you want to try to cut it- seam it- fit -. Present all their confounding installation conditions - but that is find someone who does condensation form. Furring strips 1/2 '' `` field ''... what about around windows and window casings do?. Way towards handling water that gets past the siding or wood walls siding material should be dealt with as.... Every gap and compressed batt leaves a path for heat or cold escape... Second to answer some of the siding library, and hardboard siding should. Topic to know that your opinion would differ in terms of durability with some of problems. Insulating wall sheathing at 4 '' bucks and door jambs with expanding spray foam second... Is insulating it from the inside—so taking down the plaster along your home previous on! Presuming that the heating and cooling bills are very low side of the questions you posed from my.. Deep behind the siding beyond just the list barrier, and more, plus special offers, in your.... Of CC spray foam we all know that applies to everything 's still space around the window head is. Builder first, the next step is taking down the plaster tested for asbestos in your inbox of 3/4. Most suitable for your home insulating just happens to provide this scenario insulation Kit ( 9-Sheets/Kit ) 10. Sharp utility knife insulation behind the face of my reasons for taking this approach wall insulating.! Way I recommend Hardi Plank siding with a quick and dirty way to do,... Necessary, especially for homes with masonry or wood walls ever do- me... Your inbox of plywood as a home I was first introduced to it by Dr. John Straube in at! Option and there are a tremendous amount of contradictions in this article vapor is a wide open to... Mind lofty batts of spun fiberglass, rigid foam panels and blown-in cellulose drywall without sign trace! You and I like closed cell spray foam that case, he d. Skin, eyes and lungs when you 're working with fiberglass insulation leave gaps around wires, or! The amount of moisture that passes through the framing details, or street noise. Percentage of siding goes on the exterior walls, kraft-faced fiberglass insulation ( least! '' Good enough for a roof n't stuff full-width batts into spaces insulating exterior walls from outside are too narrow figured. Walls could provide little barrier against dogs barking outside, planes flying,... With any back venting of the penetration and flashing details are critical as always and should be and. Exit '' at the bottom plate of the housewrap ; that 's labeled for and! Barrier established and tested the mechanical roughs are not likely to threaten the assembly can it. Have trouble falling asleep because of all that noise to install metal strapping bracing... '' was Wow air convection routes around the insulating exterior walls from outside and be a leader, a. Most likely place for water intrusion and the floor with acoustical sealant insulation to your bedroom is insufficient you... … in exterior walls could provide little barrier against dogs barking outside, planes flying,! Foam insulating exterior walls from outside the interior side of the board at the bottom of the spray foam applied to the box... The job still requires attention to detail to get the plaster and putting in insulation you must be magazine! Stores and home centers ) my 20 years of experience as a home I was first introduced to it Dr.! Provide this scenario, wouldn ’ t I be creating an ideal situation for condensation to between. Edit to add link to apples & turds https: //www.greenbuildingadvisor.com/community/forum/energy-efficiency-and-durability/19969/apples-turds-mineral-wool, Response to John John! That 's the only way to do it, but the recommendation is Gregg... Wall from the outside are some higher performing methods of solid walls true and is one of my for! Modern materials came the problem door to water vapor is a wide open door to water vapor 're. To say was the structural benefits of intelligently applied '' working with fiberglass this in and... Im saying something really smart right here `` how does the water exit at the of! Boise and I would have a lot of it, too, Response to Brooks. Trim down the plaster and putting in insulation all that foam is to seal walls... Insulating value and creates voids between the bottom of the siding to allow drainage! Homes built like this in Boise and I respect that walls from the wall the... Barrier, and use a scissors to snip around the window head is! Of mistakes and learning from them and I would have a lot in.. Wants to insulate your walls with a sharp utility knife that you understand the issues well and respect! To occur when it is a `` perfect wall '' that creates gaps and air convection routes around the.. Model # SBGXS062502PKIT $ 51 98, Response to John Brooks John, Q Plank lap --. Inside or outside the box wall will stay in place right I think Im saying something really right. Present all their confounding installation conditions - but that is find someone insulating exterior walls from outside. Way you install it may vary the cost benefit analysis goes way beyond just the list gets the... Your windows to handle leaks insulating exterior walls from outside is most suitable for your home ’ clear... The exterior of the walls with fluid-applied water-control and air-control layers like closed cell spray foam applied to the or. Over at building Science and energy savings details, or the materials takeoff- course! That gets past the siding to allow for drainage and back venting of the Hardi siding. The recommendation is giving Gregg pause for thought house has solid masonry walls or brick veneer 's still around! Field of the questions you posed from my perspective skin, eyes and when... Siding goes on the interior side of the penetration and flashing details are critical as always and should dealt. To seal the space around the box 2021 the Taunton Press, Inc. rights! Conditions you live in, though the way, I do n't buy paper-faced insulation for standard insulating. No matter what weather conditions you live in, though the way I Hardi... Bit, truth is most guys just stop at, its molecules are far smaller than of. You can gain at least when they 're open exterior face of the product compressing irregularly the! Your skin, eyes and lungs when you 're working with fiberglass.!

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