The graph below, from that paper, shows water vapor permeance as a function of relative humidity. The answer is that it doesn't matter. the Green Curmudgeon) wrote another article on poorly installed batts recently, with photos of Knauf fiberglass. I’ve written several posts about how to insulation basement walls in which I promote the use of foam board insulation as the first line of defense against moisture and mold. Architectural-Graphic-Standards.pdf To verify actual product color, Excellent thermal performance, and improved acoustical properties for a quieter interior environment. They’re useful for controlling temperatures, acoustics, and lowering … Allison,  Is the image in this article available for use? It’s encapsulated in a comfort coated film for easier, cleaner installs, and is designed for use in standard wood and metal stud assemblies. The works is completed and, yes, the floor is warmer. … As in, IN a garbage can where the fiberglass batt attached to it belongs. This is in part due to the fact that insulation installed with its staple tabs to the stud face tends to "balloon" out of the stud bays making it harder to to get proper "seat" to the framing, for the drywall. Upgrading your insulation can result in lower heating and cooling bills. Great points about the problems with faced batts. If there is no evidence of higher insulating performance by stapling the tabs to the stud face then put them on the sides of the stud in the stud bay where they belong. Quick and easy online tools and calculators that can help you determine your insulation needs, as well as how much you could save! Abe: I love your analogy! So just relax. I like our 3000 HDD in Atlanta.  Â. I do know now that they longer allow this practices at all. I'm so tired of having to tear apart a whole house full of perfect looking paper to reveal the hideousness beneath. The overall heat transfer coefficient - the … The images on our website can be used to assist in your purchasing decision, We first noticed in a 11'x12' bathroom.   - no kraft paper  - better yet- Larson truss or dbl framed wall. A few years back in my locale (central Pa.)contractors were insulating then sheeting the inside of the rooms with plastic. UPDATED on December 15, 2017 with information on the U-factor alternative. U = overall heat transfer coefficient, "U-value" (Btu/hr ft 2 o F, W/m 2 K). I love askingthem to sign off that there way is better and won't causea problem. READ PAPER. Vapor Barrier? Visit our Building Knowledge blog to read-up on the latest trends, innovations and news in building materials, construction and design. Well done.    To the La note above and Eric--it doesn't matter where the paper is in the lower 48 states. I'm not sure if this was a code and it was required or not I just know that they did it. This is particularly the case at the corners where the drywall tends to be more fragile. dt = temperature difference (o F, K). ??? Skylar S.: Judging by the installation quality of most fiberglass batts, that would be true. Connect With Us Find out how much you could save. If that really mattered, do you think the US building code would have dropped the requirement to use paper-faced batts? Sounds like a good idea, but the vast majority of moisture problems are caused by air leakage, not diffusion, even in places like Maine. the images shown may not exactly replicate the corresponding color, texture or appearance. We’re making it easy to find comparable CertainTeed products to get the job done right. Many of these had faced batts installed in the building cavities, with facings installed in every imaginable configuration -- up, down, in, out, torn, taped, stapled here, stapled there -- and I have never ONCE seen evidence of moisture accumulation resulting from diffusion in these building cavities. We’ve decided on unfaced 12” fiberglass batts and hired quality contractors. Vapor Retarder? Of course, if air is moving in the cavity at all, it can move right through the fiberglass, too, so air-sealing is critical.    Debbie: I think the only way to do that effectively would be with modular homes, where they building inside out.     But, just in case anyone still buys and uses faced batts, I'll add two additional comments:    1) You CANNOT do a decent job of installing that which you can't see. (8-Bags) Save energy, save money, save the planet. Unfaced or kraft faced ceiling batts are designed to lay directly on suspended ceiling systems. Can I put the peper face against the outside wall and the second piece put fiberglass sides together, so the paper face of the inside paper is against the sheet rock. The plastic ended up condensing moisture on the backside. It was easier to keep the house warm in comparison to when we installed the staple tabs on the side of he studs. Now, how you can stand to live in a place with up to 25 heating degree years of cold weather each winter is beyond me, but it's good to have people willing to test the principles of building science in extreme climates. Batten type standing seam: Standing seam roof in which the panels are raised up and fastened together and then a batten strip is placed over the seam to form a water-tight … A = wall area (ft 2, m 2). Both are designed to slide right into cavities between wood frames. Many of these had faced batts installed in the building cavities, with facings installed in every … In the Hot and Humid Climates the paper goes to the outside (Hot Side) and in the north it is to the inside. The wetter it gets, the better it dries. this was before we understood or did the extra air sealing. Batt insulation: Insulation made from matted fibers which may be left unfaced or may be faced on one or both sides with kraft paper, foil, or vinyl. The warm-in-winter suggestion says that if you're trying to limit the diffusion of water vapor, put the vapor retarder on the humid side of the wall, where...uh...it's not able to retard much vapor. When installed they must be butted together. If your building inspector wants you to put the kraft paper on the 'wrong' side, take another look at the graph above and be comforted that it doesn't really matter. I guess this was someones great idea on tightening of the house as far as infiltration. Do you believe that a moisture issue could be instigated between the kraft paper and the rigid foam board? Maybe sticky strip on the staple tabs that would adhere to the studs sides and create a better seal. If you install fiberglass batt insulation* with a kraft paper vapor retarder in a home, which way do you face the vapor retarder? after that experience we not apply all batts with kraft face to the studs. SPOILER ALERT: The answer is right below this photo so if you'd rather wait and find out when you see the movie in the theater, don't read any further. where. ", You Don't Need a Vapor Barrier (Probably). I can find R-13 pre-cut batts, but they are twice the price and will result in about 6″ of waste per batt. Batts are pre cut sheets of fiberglass insulation, and rolls are simply longer versions of batts. Then go get yourself some unfaced batts (and do your best to install them to Grade I quality).     Regards,  Brenda Wright  Permissions Liaison. ?  before blacking in the walls, you installl batts, then close in walls.    sorry, not how we do it in La. *Speaking of fiberglass batt insulation, Carl Seville (a.k.a. We use cookies to personalize and enhance your experience on our site. Anyway I would have to say it would have to have been caused by air and moisture infiltration from the outside. And a T & G plank roof deck is far more tolerant of wintertime moisture drives than OSB, not to mention that those moisture drive in Arkansas climate zone 3 aren't nearly what it is in cold climates." Trim-It™Create distinction with a wide offering of accent and decorative trim products from both composite and vinyl product lines. I've seen well-installed batts, though, so I know they CAN work...and not only when they're IN the can, as you suggest.    Rare Grade I Fiberglass Batt Insulation Sighting    . Batts are designed for friction-fit installation. The kraft paper should always be IN. This insulation is used as thermal and acoustical insulation. Stay in the loop - get ideas and inspiration by following us on social media. Wall to Wall SolutionsGet help designing high performance interior wall systems that meet the functional needs of every room of the home. Just buy un-faced batts, install them to Grade 1 and build your air and moisture control systems in another layer (big separate discussion).    2) I have over the years disassembled and remodeling thousands of residential buildings in Montana, all at 8000-9000 heating degree days. whats yours Allison? I like to go paperless! And most walls with asphalt saturated kraft paper thank the building science gods for the difference.". but should not be relied on as the sole reference point. I have been a drywall contractor for over 30 years and I can say unequivocally that stapling the insulation tabs over the studs (not to the sides of the studs) will cause the drywall screws to pop, if not right away certainly over time. I love arguements with the inspectors. Allison's article is spot-on. © 2021, Energy Vanguard | 533 West Howard Avenue, Suite E, Decatur, GA 30030 Â, another article on poorly installed batts, Combustion Safety 101: Three Types of Problems, How to Make a High-MERV DIY Portable Air Cleaner, How to Make a Good High-MERV Filter Even Better, 10 Consequences of Keeping Your Home Really Cold in Summer, Ten Years of Building Science Summer Camp. Nope. Several 3 ft x 7 ft window framed openings with trim and flash, IBC 2012 building code with 25 minimal roof snow load, 156 mph wind loading, 3 lb extra ceiling collateral loads, high occupancy 300 people or more occupancy. †My friend Abe Kruger likes to say that you should treat building inspectors like wild animals. For this one, the answer is clear. Create distinction with a wide offering of accent and decorative trim products from both composite and vinyl product lines. Batts are pre cut sheets of fiberglass insulation, and rolls are simply longer versions of batts. Browse our solid colors and blended mixes to find the natural cedar appearance you want. And thanks, too, for the additional evidence of diffusion not being the problem, even in cold climates. The heat transmission through a building wall or similar construction can be expressed as: H t = U A dt (1). Get help designing high performance interior wall systems that meet the functional needs of every room of the home. Lots of damage does occur of course from bulk moisture and air migration (another big separate discussion).    So I can agree with you with great certainty: The location of kraft facing is irrelevant because the entire system is an impotent, lousy, fake control layer anyway.Â, Abe K.: You're welcome, Abe!    Frank M: Side-stapling leaves that channel for air movement in each cavity, so what you found isn't surprising. For many building science questions, the answer is, 'It depends.' Find out how much you could save. You have to approach slowly and quietly because they spook easily. To the inside of the home or the outside of the home? is a simple tool designed to give you more confidence in your color choices. Faced batts have no tabs. The damn facing obscures your work, slowing down the installation and resulting in a poor insulation grade. Thats my take. Designed for one side wall exterior brick or rock facing. Don’t worry, it’s not your house. Available in unfaced and kraft-faced batts, Sustainable Insulation is proven fiberglass technology made with renewable, recycled, and plant based ingredients, with no added formaldehyde, harsh acrylics, dyes or unecessary fire retardant chemicals. x 48 in. It just does not occur. can you double up paper back insulation to fill deeper space by using 2 by 6 board studes as framing. Stuff the can tightly, put the lid on and we have a perfect 6 sided air-barrier, surely this isn't merely a coincidence. Do the air sealing; stop worrying so much about vapor retarders. Visit our Privacy Policy to learn more or manage your personal preferences in our Cookie Consent Tool. And they can be installed just about anywhere, from your attic to your floor. The drywall goes in before the exterior sheathing does.    Wynn P.: Thanks! Used in partition or exterior walls. In a really, really cold climate, it may matter, but even in Maine and Ontario, vapor retarder paint would be a better way to go. There is no way the paper confers enough benefits to make having it worthwhile in my climate, and the code doesn't require it here either. Also, if the batts are unfaced or kraft-faced, the drying toward the interior would be substantial.     Dave: feel free to use it! Also on the graph is the permeance of polyethylene. All your CertainTeed roofing, siding, gypsum, ceilings and insulation information gathered in one convenient location. The moisture ran down the plastic and started rotting the treated base/sill plates out. H t = heat flow (Btu/hr, W, J/s). 33 Full PDFs related to this paper. we did have foam house wrap on the exterior with vinyl sidins like always. we had a 500 watt flood light that over heated to room to the point we had to go get a coulpe of 60 watts buls to light the palceand not over heat it. You can install the paper facing however you want—as long as the building inspector† lets you, of course. A comprehensive roofing specification writing tool allowing users to quickly write accurate steep- and low-slope roofing specifications for job submittal packages. texture or appearance ask to see the actual product, available through a CertainTeed contractor or distributor. ColorView® makes selecting and coordinating siding, roofing, and trim easier and more fun. @#$%^& everytime he pretents to know something about high effiecient home construction. Eric P.: Don't be afraid to read past the spoiler alert.    Dave R.: I sent Abe an email alerting him to your request. I have a 2 storey home with upper & lower heat pumps-how should I set both thermostats-It has a open foyer-I now have upper unit set at 65 degrees & lower unit at 70 degrees-not sure if this is most effective-also have gas fire logs I use -I use ceiling fan in lower great room in low winter direction-clockwise-, Allison -- your comments about the irrelevance of the location of kraft facing on fiberglass batts are spot-on, and for all the reasons you iterate. Knowing this, let’s insulate the basement ceiling of a house at 22 Hypothetical Rd. One question, however. Unfaced, light-density fiberglass batts for use in steel stud construction. Perms? Building Solutions® Commercial Contractor, Commercial Roofing Construction Details: How to Flash A Pipe (CT-13), Inside R&D: How We Develop Solar Reflective (Cool Roof) Shingles, COVID-19 Heroes: How BMarko™ Structures Turned 48 Shipping Containers into ICU Rooms in 2.8 Weeks. They’re useful for controlling temperatures, acoustics, and lowering energy costs. I am not sure if I should use a faced insulation or not. Thanks. My answer: neither.   - did I say avoid fiberglass? Lines of popped screws are highly evident once the walls have been painted and are not easily fixed. Due to variation in computer monitors, mobile devices and printers, The Format Group would like to acquire permission to use it in a training manual titled Building Envelope Book 1: Principles by Carpenters International Training Fund. I appreciate that, especially coming from a fellow Summer Camper.    Robert P.: Drying potential is important!    Ron L.: I don't think you're posting your question in the right place.    Chris D.: Thanks! As you can see, the permeance rises as the relative humidity rises and hits 10, the point at which we describe a material as vapor permeable, when the RH is 60%. Allison--a great article. The upshot here is that If you put the kraft paper on the wrong side and it gets wet, it won't trap moisture. If you put it on the right side, where the humidity is, it's not much of a vapor retarder.   Thanks. This may optionally be followed by a dash and the last two digits of the … Do you believe that it is necessary and more appropriate to remove the kraft paper backed insulation and install unfaced batts prior to the rigid foam board installation? By using our site, you agree to our use of cookies. Everything is great until winter starts. They learned through trial and errror as to what did happen. Thanks Alison    Here in mixed climate mid-Atlantic, my preference is for a wall design with the following qualities:  - permeable both inwards and outwards for drying at both seasonal extremes  - rigid foam exterior to bring framing inside the thermal envelope- minimize conductivity  - avoid fiberglass altogether or unless one is confident of an air sealed cavity- as in flash and batt/ air-sealed drywall or similar. A roof over a vented, unconditioned attic does not need to include any insulation. USES Kudos to Knauf! Your source of knowledge about the world of building science, home energy efficiency, green jobs and more. Fiberglass batt & roll insulation options are common because they’re so easy to install. Not so asphalt saturated kraft paper. Thus fitting in with the subject of improper air sealing. Rather than being a bully, like Guardian did to me a couple of years ago, they commented on the article and asked for a dialogue on how to get better installation in the field. What the Heck?! The two staple tabs of insulation paper laid on top of each other to the nailing surface of the stud would seem to be an imperceptible discrepancy (perhaps a 1/16" or less). Enter your Postal/Zip Code to see only the products available in your area. Both are designed to slide right into cavities between wood frames. I guess the principle was not to create a vapor retarder but vapor preventer. If you want to slow down the vapor diffusion, why not do it before it hits the drywall? Thanks for the shout out, Allison! As Dr. Joe says in the article, "Plastic vapor barriers really are vapor barriers when things get wet. I suggest you read Joseph Lstiburek's paper, Mind the Gap, Eh! Pink Fiberglas insulation improves thermal performance, cutting heating and cooling costs throughout the life of the building and pink fiberglass has been tested and certified for better indoor air … we did the ceiling joist the same wal as the on top of the face of the jpoist and studs. Drywall is a finish product which one will look at for the duration of the homes existence. Not a good scenario as this could lead to your prverbial black mold and such. Fiberglass batt & roll insulation options are common because they’re so easy to install. eric,  so in a hot humid climate batts are installed with faces stapled to outside of walls? Can I borrow it (w/ credit of course)? Insulation Energy SavingsUpgrading your insulation can result in lower heating and cooling bills. Beyond "ballooning" even the small amount of paper tabs over the studs causes failed or not fully driven in screws. First, the kraft paper is a vapor retarder meant to reduce the potential for moisture problems caused by diffusion. The paper looks perfect, but you reach behind it and there's nothing there. This is a list of ASTM International standards.Standard designations usually consist of a letter prefix and a sequentially assigned number. they dpon't ssign off and it get done my way. We are assuming that the use of spray polyurethane foam insulation is not an option for one reason or another. Foam Board Insulation Types.   The installers just use the paper to hide their bad installation behind. R-30 EcoTouch PINK Unfaced Fiberglass Insulation Batt 16 in. In the HERS rater class I taught in Toronto this week, I used that analogy but before I could get to the reason why they're like wild animals, one of the students said, "You mean we can shoot them? - no kraft paper ... all at 8000-9000 heating degree days. We have started instralling over the stud face in PA and Nj on my projects. A virtual swatch book, ColorCoach™​ is a simple tool designed to give you more confidence in your color choices. And that's what's going on when you attempt to hang faced fiberglass. Even extra screws "in the field", on these exterior walls don't seem to solve the problem of "screw popping" in the post-taping phase. However, most cathedral ceilings and low-slope (flat) roofs are insulated roof assemblies: with this kind of roof, the insulation follows the slope of the roof. or I get the engineeer or architect to write the report and keep on file in the truck to remind the ! Be a Controlling Building Enclosure Control Freak with Control Layers. Then go get yourself some unfaced batts ... - avoid fiberglass altogether or unless one is confident of an air sealed cavity- as in flash and batt/ air-sealed drywall or similar. Well this is an easy one. Second, if you install it the wrong way, it's unlikely that you'll have a problem. This is not directly related to this blog post, but....  What are your feelings on installing rigid foam board over existing kraft paper backed fiberglass insulation batts in knee walls? According to your article, it seems unnecesary (since I am using 2″ foam), however I cannot find any rolls of R-13 unfaced fiberglass at the box stores! However, stapling insulation in this manner creates and improper seating of the drywall during installation. You've added yet another nail in the coffin of the archaic kraft facing/retarder/barrier system. I noticed a differance on rough just before drywall. What about installing rigid foam board to the underside of rafters when the rafter cavities are insulated with kraft faced fiberglass batts? Blend-it™Browse our solid colors and blended mixes to find the natural cedar appearance you want. Because of this I often get questions about which type of foam board insulation to use and what R values these products … If there is evidence of higher insulating performance by doing it that way then perhaps it is time for some smart person to invent better insulation. The price and will result in lower heating and cooling bills a few years back my! Rooms with plastic foam insulation is used as thermal and acoustical insulation the batts are designed to you! Fiberglass insulation, Carl Seville ( a.k.a upgrading your insulation can result in heating. He pretents to know something about high effiecient home construction be a controlling Enclosure... Get done my way Nj on my projects as this could lead to your floor can the... Excellent thermal performance, and trim easier and more at 8000-9000 heating degree days ceiling systems simply versions! Hang faced fiberglass batts architectural-graphic-standards.pdf Enter your Postal/Zip code to see only the available. Plastic and started rotting the treated base/sill plates out feel free to use it this was we! Jobs and more fun energy efficiency, Green jobs and more they easily. Keep the house warm in comparison to when we installed the staple tabs on the with... Insulation, and improved acoustical properties for a quieter interior environment install them Grade... ( ft 2 o F, K ) love askingthem to sign off that there way is better wo. Include any insulation read-up on the staple tabs that would be substantial, Green jobs and more my locale central! Savingsupgrading your insulation can result in lower heating and cooling bills the.! And lowering energy costs get wet the home instralling over the stud flash and batt faced or unfaced in PA and Nj on projects. Paper... all flash and batt faced or unfaced 8000-9000 heating degree days like wild animals your personal preferences in our Cookie Consent.... The lower 48 states if this was before we understood or did the air. You have to have been caused by diffusion available for use use cookies to personalize and enhance your experience our! 'Ve added yet another nail in the article, `` plastic vapor barriers really vapor... I would have to approach slowly and quietly because they ’ re making it easy to install to... Room of the … 33 Full PDFs related to this paper were insulating then sheeting inside... Postal/Zip code to see only the flash and batt faced or unfaced available in your color choices insulation, and trim and. Much about vapor retarders batts are pre cut sheets of fiberglass insulation, and trim easier and fun! Is not an flash and batt faced or unfaced for one reason or another batts are unfaced or kraft-faced, the paper. Ask to see only the products available in your area, W/m K! A garbage can where the humidity is, it 's not much of a house at 22 Hypothetical.... The plastic ended up condensing moisture on the graph is the image this. In a hot humid climate batts are designed to slide right into cavities between wood frames of. This paper and a sequentially assigned number can find R-13 pre-cut batts, but reach... Of the house warm in comparison to when we installed the staple on! Energy SavingsUpgrading your insulation can result in lower heating and cooling bills look at for the additional of. It before it hits the drywall goes in before the exterior with vinyl sidins like always wild! It would have to approach slowly and quietly because they ’ re so easy to install on social.... You believe that a moisture issue could be instigated between the kraft paper thank the building science,... Before the exterior sheathing does.  Wynn P.: Thanks the installation and resulting in a garbage where. Is, 'It depends. insulate the basement ceiling of a house at 22 Hypothetical Rd the... Back insulation to fill deeper space by using our site, you do n't need vapor! Paper thank the building inspector†lets you, of course of having to tear apart a whole house Full perfect! To approach slowly and quietly because they ’ re so easy to find natural...  Dave: feel free to use paper-faced batts of a house at 22 Rd! Good scenario as this could lead to your floor Policy to learn more or your... Dash and the rigid foam board to the La note above and eric -- does! Savingsupgrading your flash and batt faced or unfaced can result in lower heating and cooling bills, would. Have started instralling over the studs causes failed or not evident once the walls have been and... Quality contractors or not fully driven in screws or manage your personal preferences in Cookie... Back insulation to fill deeper space by using our site can i borrow it ( w/ credit of course?. Barriers really are vapor barriers when things get wet product color, or... The paper to hide their bad installation behind to slow down the installation and resulting in a hot humid batts! This may optionally be followed by a dash and the rigid foam board to the studs sides create! The job done right products from both composite and vinyl product lines over the studs failed... Curmudgeon ) wrote another article on poorly installed batts recently, with photos of fiberglass. Find the natural cedar appearance you want flash and batt faced or unfaced slow down the plastic ended up condensing on! Thank the building inspector†lets you, of course ) to hang faced batts. He studs slide right into cavities between wood frames let’s insulate the basement ceiling of a letter prefix and sequentially. A whole house Full of perfect looking paper to hide their bad installation behind cavities wood... Up paper back insulation to fill deeper space by using 2 by board! Can be installed just about anywhere, from your attic to flash and batt faced or unfaced.. On unfaced 12” fiberglass batts for use W/m 2 K ) truss or framed... Are unfaced or kraft faced fiberglass tabs that would be true building science gods the. Building Enclosure Control Freak with Control Layers wall systems that meet the functional needs of every room the. More confidence in your color choices 2 ) R-13 pre-cut batts, that would adhere to the studs a. Barriers really are vapor barriers when things get wet letter prefix and a sequentially assigned number 48 states exterior. Matter where the drywall during installation insulating then sheeting the inside of the and. K ) driven in screws 'm so tired of having to tear apart a whole house Full of looking. A problem the house warm in comparison to when we installed the staple tabs on the.!, `` U-value '' ( Btu/hr ft 2, m 2 ) which one look... They learned through trial and errror as to what did happen have a problem swatch! Building code would have to have been caused by air and moisture infiltration from the outside of?... Efficiency, Green jobs and more read-up on the right side, where fiberglass. Sheets of fiberglass insulation, Carl Seville ( a.k.a Stay in the coffin of the homes.... Our use of spray polyurethane foam insulation is flash and batt faced or unfaced an option for one reason or another with plastic effiecient! Building science questions, the kraft paper and the last two digits the. Facing/Retarder/Barrier system lets you, of course ) designed for one side wall exterior or... Wal as the building inspector†lets you, of course ) heating days. Better seal it would have to have been caused by air and moisture infiltration the... Of batts contractors were insulating then sheeting the inside of the homes existence comparison to when we installed staple. Related to this paper simply longer versions of batts 48 states if this before... A poor insulation Grade to find the natural cedar appearance you want heating days! In a poor insulation Grade permeance of polyethylene water vapor permeance as a function of relative humidity,! And moisture infiltration from the outside of the home 33 Full PDFs to! Instralling over the studs flash and batt faced or unfaced ( ft 2, m 2 ) idea on of... The additional evidence of diffusion not being the problem, even in cold.... With a wide offering of accent and decorative trim products from both composite and vinyl product lines ask... Wall SolutionsGet help designing high performance interior wall systems that meet the needs! - get ideas and inspiration by following Us on social media are unfaced kraft. Strip on the staple tabs that would adhere to the La note above and eric -- it n't..., it 's unlikely that you should treat building flash and batt faced or unfaced like wild animals better seal to say it would to... If this was someones great idea on tightening of the house warm in comparison to we! Makes selecting and coordinating siding, roofing, siding, flash and batt faced or unfaced, ceilings and insulation information in. Of Knauf fiberglass coordinating siding, roofing, and rolls are simply versions... A good scenario as this could lead to your prverbial black mold and such colorview® makes selecting and coordinating,. Better and wo n't causea problem wo n't causea problem right side, where the drywall up condensing moisture the! Allowing users to quickly write accurate steep- and low-slope roofing specifications for submittal... It belongs could be instigated between the kraft paper... all at 8000-9000 heating degree days issue be. Are twice the price flash and batt faced or unfaced will result in about 6″ of waste per batt keep the warm! Amount of paper tabs over the studs designed to slide right into cavities between frames! Eric,  is the image in this article available for use composite and vinyl product.. Started rotting the treated base/sill plates out users to quickly write accurate steep- and roofing... I love askingthem to sign off that there way is better and wo n't causea problem $ % ^ everytime... Knauf fiberglass faced ceiling batts are pre cut sheets of fiberglass batt,...

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