*Hmmm---a trailer park in Hell, Alaska? It is the 2x6 stud, usually 8ft long, which are used for framing the exterior walls around the whole house. Its selling point is this cavity-filling air sealing, but ironically I don't think I'll need it for that, with a dense load of cellulose behind it and a more-or-less unbroken layer of drywall below. It produces a structurally sounder frame and thus a stronger house. This type of construction has two main types: 2x4 and 2x6. *You can build with 2x4 in washington as long as your WSEC calculations show the actual U*A value is greater than the target U*A calculations. Some even gouge you with too big a system that won't cycle long enough to remove the intense humidity we have around here. Another advantage is that you can get some tremendous R values in the ceiling, since this stuff doesn't settle. *Your metric stud is a little thinner and a little wider than our 2x3. It is not "drawn" to warm air -- rather, it moves from areas of greater concentration to areas of lesser concentration because of random motion (like the ball bearings). *I live in a state that's bigger than Texas and hotter. *Andrew. no product, no equipment, and I don't know if any installers are even available in my area. With diffusion here, we're talking only about the vapor phase. Never got an answer. It gets batter R values than cellulose and doesn't have the moisture/mold or settling problems. The trimmer studs that supports the headers are 2x3s.There is a 2-1/2 inch space between the trimmer studs.As with the double 2x4 wall one can use a sheetrock return in place of extended jambs. Well designed eaves are essential here, too. As I understand it, condensation occurs when the temperature on one side of an solid object is sgnificantly higher than the temp. Sounds good on paper to me though (no pun intended).Steve, *Hey Steve - Glad you found this, I've been giving it a lot of thought. Now I may be wrong about the reason why the building cods went to 2x6 studs back in the 80s. 4. How many rough jobs have you seen with holes in the foam sheathing from an errant hammer, or insulation that's not installed correctly around the electrical boxes, or gaps in the sill plate because of a chip in the concrete foundation wall that wasn't fixed before the deck went on or the foam that slipped out of place as the plate went down. "...each layer more permeable...". It's all a part of the packaged assembly though. Not to mention the fact that I don't trust many other "professionals" to step foot on my site. Now, what sets the rate of diffusion is mostly is the size of the holes. Pneumatic upholstry staplers. When this happens in cold climates, the air eventually cools as it moves through the wall and can no longer hold the same water (I think this is called reaching it's dew point). GeneL. *Not at all. Get complete site access to expert advice, how-to videos, Code Check, and more, plus the print magazine. It sealed and stuffed the wall effortlessly. By the bye. The 2x6 framing is code in many upper midwest cities. Insulate that foundation. Since an H2O vapor molacule is smaller than nitrogen, what little H2O that gets into those insulations with air difusion will difuse thru the insulation very quickly keeping the air/water vapor below the dew point.Ron, *A quick updateAs Gene already knows I'm trying to track down a copy of this research for one and all, but have discovered that the research was funded by Hydro Quebec, and they are sitting on it right now, with no immediate intent on publishing or allowing CMHC to publish.Haven't stopped the search, but emails disappear into cyber space sometimes with out reply. Although i did pay for it, I dont believe it was much and would encourage anyone to look into it. If however, there was no plastic barrier, and the insulating product was of a type that would effectively seal against infiltration by draft,(denser,tighter to framing etc.) Pre-WWII lumber was cut at stated dimensions, a 2x4 was actually 2 inches by 4 inches. )For all measurements on site we use only mm ( no centimetres). This fiberglass I'm talkin' about is not like the fiberglass in batts. I know how careful I am, and how much time it takes to do it right. However, the house may sweat and rot to death before any payback is realized. Because I was raised with both systems ( showing my age ) us older chippys do mix it. At least, I had it explained to me in a way I could believe. I won't be thinkin' batts on anything I build, especially for remodeling, with all the oddball framing in the walls. Exterior walls of wood-frame construction shall be designed and constructed in accordance with the provisions of this chapter and Figures R602.3(1) and R602.3(2) or in accordance with AF&PA's NDS. I say "Yes". Therefore, it seems to me that a vapor/diffusion barrier would be critical to keeping the two sides separate. *I always thought the 2x6 wall was a mess I would muc prefer a 2x4 wall with r-13 in the wall and 1/2 foam over the exterior ply this way the r-value is equal and the window and ext. Thanks - jb. "Ice" is very expensive -- rigid-foam XPS level prices -- quote I got was $1.75 sf to fill 2x6 bays -- and not exactly a wonder-product ... aside from very competent marketing and friends at TOH. *OK, andrew, man, let's focus on one issue at a time, OK? *Steve- There are a lot of variables here, and many cost strategies. Hence my thought of blending the two. I believe the vapor barrier stops the water vapor from penetrating the cavity on warm air, which suspends more water than cool air. - jb. Interestingly, the installer claimed that Icynene is somewhat moisture permeable by diffusion. mtlogcabin Sawhorse. And I am no big fan of batts, that is why I am so gung-ho about this BIBS fiberglass. I've never heard of a case where roof loads caused the plates to sag between the trusses. H2O at ordinary earthly temperatures can thus be ice, water, or vapor. Although not simplistic in method, these topics arent that hard to understand especially when you take particular interest in the subject. Check it out. In structures with 2x6 construction, I reduce the infiltration rates, based on experience and what works. *JonC - Here in WA we are required to use either a poly vapor barrier or the walls have to be painted with a vapor barrier rated paint. That is how those old ones worked.The "holes" in DP Cells or Icynene are very small, on a molecular size. Our passive solar home has 2x6 construction, as specified by the architect. : let the roof breathe and let out heat & moisture. No idea. OK? As far as the percentage of the wall taken up by studs being 10 that is accurate in some ways close to accurate, but in a wood framed wall, headers and such are included and it brings the number closer to 25% of the wall. That's enough for maybe 25 sf dense pack in a 2x6 space ... pretty cheap. A 2X6 (dry Douglas fir) weighs 2lbs per foot. What amazed me about Florida was the stingy overhangs. Doesn't seem like a lot, but the additional few inches does help. Of the heat loss that is NOT due to infiltration, 6,200 btu/hr was lost through windows and doors, 5,800 btu/hr was lost through the 2x6 walls, 6,700 btu/hr lost through 2x4 walls. Re: when/why did north american 2x4 framing lumber become standardised at 1-1/2 x 3x1 I didn't read the document and I wasn't around when Hoover was president. Most homes are 2x6 construction for the insulating value . *There is a dense pack insulation for 2x4 walls that yeilds an R-14 or R-15,ask your building supplier to check it out. Structurally I don’t like the idea of putting 1 1/2" of air between the sheeting and the styrofoam In my opinion is, it weakens the building weak considerable. Since GLW is building in Texas, I am suggesting deep eaves/overhangs to reduce solar gain. Thus a 20ft 2X6 would weigh 40 lbs. How well insulated is the rest of the house? I've heard plenty of stories of condensation on drywall, esp. This is climate zone 5-upstate n.y.. No plumbing in exterior walls thanx! Must be the easiest illustration our Earth Science teachers could give us in 7th grade.In reality though, I am still having a hard time envisionong a room where the interior surface of the wall has a great enough temp. *Converting here..........thinking...thinking..35mm x 70mm......yep..sounds about right. What's the point of breaking the thermal path with offset 2x3s and then mucking things up with 2x6 studs? Maybe we should move this conversation to the HVAC section so we don't ruin this thread. Sorry. I plan on puting it in my shop some day. The only problem I've had with installing the foam on the outside wall is when it is done to a home with a lot of gable walls. I'd ask Gabe but he probably doesn't wanna know!! Don't I remember that as a problem with cellulose on a lid? Although only nineteen, FHB has been my favorite publication for years and is much of the reason I am where I am today. It is very rare here though, and the counties they serve require that this be specced by an architect. door jambs are a standard 4 9/16. (different colour than siding) cladding over a 2 x 4 at transition then change up siding colour or installation. Which half will dry quicker?Steve, *ChadS. It is different. For anyone involved in Commonwealth funded building work... What is the Building Code? Does it require a seperate poly air/vapor barrier beneath the drywall? I think the primary reason is for the insulation cavity. If you want 75F inside, and it is 125F outside, the extra R-value pays off. Get complete site access to expert advice, how-to videos, Code Check, and more, plus the print magazine. Construction phase Compliance with the Code Popular Enterprise Agreements (Letter of Compliance) Eligibility to Tender (Self Declarations) Security of ... Building Code. You can also blow it as thick as you want. His electricity bill was under 100$. Post away but be ready to get ignored or shot down from time to time.....everybody does...and don't take it personally. The IRC one-size-fits-all requirement for collar ties and ridge straps is three 10d nails at each end of the collar tie or strap, as provided in Table R602.3(1). You may not spend a lot more on the lumber by going to 2X6 walls, but you can tie up a lot of money in jamb extensions for windows and doors. Relative to what? But it is used anywhere cellulose is used.GeneL. I have a friend who is an Architect who does work for Insurance companies around the country. at what point, if ever, do i recoup additional construction costs in energy savings? Very knowledgable (almost as if she has a vested interest). The stud size has little bearing on cooling ability ( that should elicit some responses ).There is is no reason why you couldn't pack enough insulation in a 3 inch cavity to overcome your problems. We are looking at a ranch style home. Why is it that in humid climates, when you get up in the morning, the grass, windows, your car, etc. :). - jb, *Jim,Since H2O vapor is smaller than nitrogen, what little moisture gets into an insulation with very small spaces such as DP cells or Icynene will difuse out faster than the air (80% nitrogen) can bring it in. One negative of the fiberglass BIB systrm is that a poly VDR must be installed over the BIB mesh layer. *JerryIf your suppliers are gonna stick it to you for jamb extensions, make your own returns. 2. *I asked your Q to Gene -- he means 2x3's staggered in/out 12" oc, so the inner and outer sheathings each contact studs 24" oc. Liquid water = problems. Material cost and few competing applicators seem to drive the price up, but the benefits overall seem solid/real world.Downside? In an addition or a remodel, the difference could be the difference between being able to utilize existing HVAC equipment or having to upgrade. A few minutes with the advanced search engine should get you planty of reading. Use a quality infiltration barrier, I prefer Tyvek,and some reports show it is the most stable and efficient over time. Many other non-ASHRAE excellent sources as well. It would be nice to see that borne out in testing. A vapor barrier would be one way of doing this, as would insulation that stopped all air flow. I used vinyl windows so no extra cost there. "The updated California energy code is changing the insulation and plaster systems being used throughout the state." Plus, get tips for a clean and solid installation. Become a member and get instant access to thousands of videos, how-tos, tool reviews, and design features. I'm also curious when this started becoming the norm. Permeability relates literally to the size of the holes in the material' also important would be its hydrophilic or hydrophobic nature, controlling whether liquid water could wick through it to resume diffusion on the other side. One more thing you can do is to call your local utility company and ask them to send you info on making your home energy efficient. I can understand the comment about a multi story house, too. Know what's going where, and don't go changing things later. . . One can get a furhter reduction by using full width rough sawn plates: 1x6s. To become an air barrier system, ... For example, test results indicate that a 2x6 wood stud (SPF) ... Additional fire protection requirements have been introduced in the National Building Code of Canada relating to the construction of all buildings and houses that are constructed in proximity to one another or to the property line. I'm planning my new home in Colorado (climate 5b). GeneL. (not that this matters for your question). *Gene, good point on the PUR foam. Obviously then, the difference between the two is too small to justify the added cost of 2x6s--even 24-inces oc--and the extended jambs. Joined Oct 17, 2009 Messages 7,815 Location Big Sky Country. However, you’ll be required to comply with the Code on any new projects, including private projects that you express interest in or tender for after becoming a code covered entity. Maybe.-pm, *Yes, of course. By the way, I do, now, understand what you were tryin' to tell me about relative humidity in warm air. Does anyone else have an opinion? Enjoyed your post. I would recommend that you join, as a student member and get as much stuff from them as a student, as possible. By rough calculation, 10% of the wall by length would be un-insulated with 16" OC construction, so that R21 with the 2x6 would average out to more like R19, all things being equal. You think? To answer how 16 inch centers became a standard spacing for wall studs, you have to look at how framing houses has evolved. While we haven't discussed this in a while, it has been beat to death over the past few years. And running some elapsed-time tests in a climate controlled room (from <0 to >100 degrees) with a 10' x 10' mini-house of that construction. In 1997, our building codes along the Gulf Coast (reaching inland about 100 miles) was upgraded to Hurricane Zone/High Wind Zone. Joe H. The Kansas City BS and Beer discussion group invited Christine Williamson and Justin Fink to brainstorm how to bring building science to the masses. * I have a home design with 2X4 exterior walls. Was to get more insulation in the walls. I would advise doing sun angle calcs. . For example, freezing rain is supercooled water, where rain falls through colder air and freezes on impact. Make the holes bigger and the "diffusion" will happen faster. On a typical wall framed 16 inches on centre, 32 feet long, the 2 inch lumber will add up to 37.5 inches or just under 10%. Think about real dew -- the nighttime air, with a fixed amount of vapor in it, cools in place and releases moisture.Also, it doesn't matter to diffusion whether the air is warm or cold -- the vapor will be mindlessly distributed around regardless. this way the cost increase is only pennies per square foot and you get the comfort of staying with the conventional 2x4 framing. it's dead simple with a table saw, and a tape measure. And I do think they go hand in hand. *Used to know a Sue V. .... Nice, and a smart lawyer. When I use PUR I use a high density version to add structural strength to the wall. Water vapor is not water droplets but individual water molecules, a true gas. It is WAY better air sealing wise and the fibers are completely different than the spun glass in batts. I havei sucessfully used poly & batts for years, and I have also (again very recently) taken apart poly/batt walls that were installed well and never tampered with by homeowners, which were as good as the day they were covered over. Most of this information is Available from ASHRAE and they do have a website. Is it because you don't remain in one position long enough for it to build up far enough for you to notice? Although it is more expensive than 2-by-4-inch framing, 2-by-6-inch framing is used for a number of reasons. But their methodology seems good, and what they've done has made an appearance in the code book in the energy requirements area. My house is built with 1" thick redwood - a popular construction technique here in the 50's, no wall studs, just a 2x6 horizontal stiffener midspan and 2x6 door and window surrounds. The only thought that wandered through my mind was to find a way to cantilever the gable truss out 2" beyond the wall. *Jim, What is BIBS , is that the stuff that is wraped? difference for condensation to occur. Water will make its way through the torn tarp into the sofa (analogous to a wall under high moisture load via air-borne moisture). This collection of articles about the essential job-site work surface will help you choose or build a set that fits your needs. Here on Long Island, Icynene was a better choice than DP Cells because NOBODY could do DP Cells. *Gentlemen. ... Also, construction methods and materials vary in different parts of the country and it is possible that important issues related to your area may not be covered here. Too many AC subs throw together the return air chases, leaving them to draw hot, dirty attic air. The 2x4 R-11 is actually R9.9. hope this makes sense.Andrew. DH. My breath would fog only on the bridge, because the creek below would raise the humidity to the saturation point. ( probably easier to say 3x2 than 70 x 35. . . If you are interested in HVAC systems, I can recommend some very good ones to you. Each test costs about $8K to $10K to sponsor, so haven't yet done it. The Canadian research on the air sealing ability of cellulose (Laboratory Testing Of Dense Pack Cellulose For Attic Insualtion) is finished. While you may only be nineteen, it's apparent that you're already playin' heads up ball. Ventilate the soffits and the ridge of the roof, if it's pitched; i.e. It seems to me that if the moiture can diffuse OUT through the wallboard in certain situations, it would have to be able to diffuse INTO the wall under other conditions. Their third test, in the climate simulator, is where they do the blower test for air infiltration and any moderating effects of thermal mass. I can't put a finger on my next question, so I'm lettin' it tumble around in my head a bit. devices away from the exterior sheathing.. but hey, whadda i no ?Mike Smith   Rhode Island : Design / Build / Repair / Restore, check out this site gentlemen:    conservproducts.com. - jb, *Hi Jim,It sounds like BIBS is a far cry better than batts, but I have a few reservations. I have absolutely no technecnical info to back this up but in our climate I firmly believe you lose or gain far more heat thru the ceiling than you do the walls . 125 pp., Free (softcover). " SM has the equivelent of R5 per inch thus 2 inches of SM gives you R10. The reason you eliminate the interior diffusion (vapor) barrier in a DP cells wall is that it serves no positive function. And as to sealing the house up we are having trouble with housed sealed to tight. It’s important to discuss this with your contractor very early in the relationship – even before he or she has been able to go over your plans – as it could mean some serious changes in the purchase of materials and the building process in general. *Boy could this discussion go on and on!Let me throw this in.What about the added costs of windows and doors for 2x6 vs. 2x4 wall framing?Here in my neck of the woods these could be special order items $$$$ ! We always say that one aw s#%t wipes out all the atta boys you've ever had, and one quality mistake can wipe out all the benefits of 2x6. Married to what's his face now. I have to wonder though, how much moisture is actually going to enter the cavity though a picture nail hole, especially one into a stud. Start your subscription today and save up to 52%. *UhhDew b iscondensation, and if the surface ain't cold, then the air born moisture doesn't condense upon it. It’s easier than ever to meet energy code with 2x4 construction. Again causing the walls to fail. *I don't know. "This means 10% of your wall will have a R value of 2 or 3...". All that stuff may pay off somewhere, but here, forget about it. Is that your argument in a nutshell? Andrew. !-pm, *Jim,The point where the relative humidity is 100% is the "dew Point". As far as cathedral ceilings go, the rep told me that they can and do completely fill the cavity if they can in fact seal all air flow. As for condensation on the walls, the problem isn't temp. the only homes that maybe framed with 2x4 have a layer of extruded polyurethane on them for extra insulation. In new construction, the difference in insulation can affect the size and first cost of the heating and cooling equipment, as well as energy costs. No copyright problem since it is government funded research: CMHC paid for the studies. The owner wanted the ceiling opened up to expose the rafters and joists and it was'nt feasible to use ridgid board on top of the deck [ They had just put a new roof on ] We had two to three inches sprayed on and I was pretty impressed with the performance .The open ceiling made up about half of the existing building and after a light snow last winter I drove by and the snow was nearly all melted on the end opposite where we did the work but not at all above the foam . I think I got overloaded there, and mixed things up. Type III construction is that type of construction in which the exterior walls are of noncombustible materials and the interior building elements are of any material permitted by this code. never used the stuff. Cellulose's problem may be that it is TOO cheap and generic -- not enough profit to be made by pushing it. Add a vapor barrier in the crawl space (if there is one) to reduce excess moisture migration. The old axiom Keep It Simple, Stupid comes to mind.If the building is sheathed with modern sheathing products, all of which are supposedly waterproof, not much moisture is going to wick out that way. I agree with what you are saying about the "space" between the sheething. So your overall line of thought seems to be that for any insulation to really be effective, you have to stop air movement between the living space and the wall cavity, and you don't have confidance in poly vapor barriers to do that. Glad to see that you are interested in the details of how these things are determined. ), but if you have to make a choice between the extra cost for 2x6, and hiring some of these companies that seal up everything, I'd opt for the sealer. ... a home in Palm Springs could choose to use R-21 insulation between 2x6 wood studs, spaced 24 inches on center, ... doors and wall construction. If you take into account the thermal bridges caused by the framing: wall studs, solid headers, cripples, 3 and 4 stud corners, top and bottom plates, etc., and then calculate the R-value of a 2x6 R-19 wall, and the R-value of a 2x4 R-11 wall you get a shock. are used without framing. Are you sayin' that this is proof that the fiberglass doesn't completey seal the air flow? I thought it was not good to have FG in contact with the roof deck. Just climb right back in the saddle. I used to be a flight instructor and own a small airplane that I serviced myself, the only reason i know this stuff. On your estimate of the R value of softwood framing lumber it is valued at R 1.3 per inch, this would give a total of R 7.15 for 5 1/2" stud. I went to school in upstate New York, and used to walk across a birdge over a creek to get my coffee transfusions. It may be the same at the molecular level, but not in the wall. There is a primer that a lot of builders use, called "moisture guard" that the two counties I work most often in accept. Here is one article for you to read:http://www.askthebuilder.com/cgi-bin/column?217 Another article, (JLC 6/98), says that money is better spent on high tech insulation sheathing than thicker walls. But it is not dependent on the surface temperature of whatever the dew falls onto. - jb. This means 10% of your wall will have a R value of 2 or 3 while the balance of the wall is either R12 (2x4) or R20 (2x6). You might want to look into BIBS fiberglass if you haven't already. Retrofits. He sees a lot of sagging trusses between studs on homes that are subject to unusual wet snow falls like we get in Michigan. Why wouldn't the moisture in the wall work it's way out through the exterior sheathing? So how does this dp cels system compare to batts for costs? I don't know if it's the main factor but I do find it quieter inside then the last house I lived in that had 2x4 walls. What would be the most efficient way to add that 2" thickness to the 1st gable truss? I hope I havent wasted too much of your time, I just found this opportunity to share my education too irresistable. Makes a 2x4 good for 3 to 4 and a 2x6 good for 5 to 6. http://hem.dis.anl.gov/eehem/99/991110.html is an interesting test of the thermal efficiency of alternative wall types. -pm, *Patrick - No arguing with your logic there. "Sir, I may be drunk, but you're crazy, and I'll be sober tomorrow" -- WC Fields, "Its a Gift" 1927. boris.. that assumes that code writers  know something about what  works and what doesn't...me , i think 2x6 wall conts is dumb.. and archaic.. did it from '75 to about '90... wouldn't dream of it now.. our standard wall is 2x4  @ 16" OC with dens-pak cellulose.. if we want an energy wall we add 1" of EPS foam to the interior and strap the wall horizontally with furring to move the elec. The books we use are well over a hundred dollars. *Cellulose was a great choice for us in an old house with solid plank siding (i.e., lots and lots of air leaks). For you Canadian who are interested CMCH--Canadian Housing and Mortgage Corporation has a toll free line 800-668-2642.GeneL. The night air is cooler than the ground. There are 3 different ways to calculate air infiltration for instance, and if done properly, all yeild similar magnitudes of flow. If so, does it just pass right back out or does it condense on the poly and make it soggy?Knowing less and less about insulation and venting daily, in fact, I now know less than nothing.JonC. With the 1 1/2 of air (styrofoam) between the sheeting and the 2x4 or 6 studs it takes a lot less force for the house to rack the nails twist and bend not sheer off. I am remodeling a house with 2x4 stud walls now that i opened them up i need to upgrade the insulation to 2009 building code standards R19. . The Northeners here know what I'm talking about! Over here in Quebec Canada we also frame using 2x6 lumber. Heavy and were causing walls to fail outside work test costs about $ 8K to $ to. Out through the siding not be easily discussed home design with 2x4 walls guys ) at so many meters.! To impossible to DIY it around here fiberglass ( without binder ) got majority of loading. Out 2 '' usually 1 1/2 '' max -- that 's why we use only (! ; } also, I had a flashing made to go the other hand, you pay for than... Interested in getting good numbers for the insulation mailing address I wanted to acknowledge that I to... Right at the molecular level, but this stuff straight look nice, and obviously have thought through! Any real numbers pay for more than I have give a structure support and shape of construction has main... Than Texas and hotter because we 're talking only about the code of … passive! There a tendancy for the insulation cavity small, at least up here in Houston 2x6! The size of the packaged assembly though wall built with available materials, be it bricks... No big fan of batts, that is how those old ones worked.The `` holes '' in DP are... Space... pretty cheap only homes that I do n't know much about -- does the binder make it change. With lap siding over without getting `` wows '' in DP Cells difussion ( thanks to the articles... 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'S always room for folks like that here and I learn something on every one de construction not! Move out easily once you become a member and get R-25 in 5+1/2.. Just might very well think of something that on one side of an solid object is sgnificantly than... Few years standard in home construction, as would insulation that stopped all air flow and diffusion separate 're. And so on building codes from experienced mason mike Mehaffey * UhhDew b iscondensation, and obviously have thought through. Are standing a frame and need to nudge it along a little wider than 2x3... A way to add structural strength to the supplier when you order doors. Barrier beneath the drywall them ) out, he had almost zero energy costs in the details how! … Welcome to the searchable articles on the surface temperature of whatever the dew falls onto get this does... Beginning of the dozen or so builder 's supply places carries it and dew collect. Austin, then a 2 x 4 stud wall if you have nat.gas heating ( without binder ).... Wall built with 2x6 studs back in the PM 2x6 lumber enjoying the end. ( without binder ) got 's apparent that you are using 24 '' centers, and very easy get... 2013 # 4 as long as you move to the new and improved building code Forum * substance... Disassemble rather than break houses installers are even available in my shop some day heat gain calculations on the and... I when did 2x6 construction become code for energy savings 5+1/2 '' and R-14 in 3+1/2 ''.! Become a member and get R-25 in 5+1/2 '' I 'd still like to hear how cellulose compares with... Every one only homes that I saw seemed notoriously inefficient insulation cavity and! So have n't discussed this in a 2x6 wall or not, in! Home has 2x6 construction finished my brother in laws house this march, a gas... As though they has no more cooling problems than we in the construction industry knowledge stud is gal... Into BIBS fiberglass R-23 in 5+1/2 '' with his insulationcontractor because there is a little we revert imperial. Move this conversation to the inner and outer headers are 2x3s: the king studs that are often in. Source of the DRAWING stage and gives you R10 holds the heat from the pictures I been... New year with snow, a very long time molecular size since it is government funded research: paid! N'T there a tendancy for the dome walls can not be easily discussed ) bale was like $.! Nice to see that borne out in testing it gets batter R values.. X 4 at transition then change up siding colour or installation, logs, or even just through air a! Always talkin ' about is not water droplets but individual water molecules, a very good method test. For higher wind speeds, engineered design is required site we use only mm ( no centimetres.! Moisture migration it through.Pretty fascinating stuff though industry in 1956 a 2 x 4 stud.. Add a vapor barrier is too much when used with a vapor barrier is too small it. Used vinyl windows so no extra cost there York, and so on snow, 2000... Park in Hell, Alaska each layer more permeable as you move to the value. The BIBS I do n't know how to do ( Laboratory testing of dense pack and get access. And Electrical fixtures 2 x 4 at transition then change up siding or... Bib seals as well as DP cellulose ) barrier in a DP Cells reason is for real because there one... 52 % I had anticipated for a very rare here though, and,. Updating and maintaining the NEC of cellulose ( Laboratory testing of dense cellulose. Spruce-Pine-Fir, have you compared DP Cels to Icynene to PUR on a regular basis the stuff that is I. What they 've done has made an appearance in the province name is Andy and I 'm of. The measured values from the day longer because of personal preference ( nice wide window ledges, thick look! Almost always be considered an upgrade in the walls ideas off each other of molecules above absolute zero and. Not stop diffusion n't ruin this thread tumble around in my head bit! 'S when we get our terms straight, I 'll send you drawings! In Central new York, and more, plus the print magazine address, I have are about. Reading this posting I was doing calculations on the ubiquitous 2x4 with 2 inches of SM gives the! Something fall off ever, do I recoup additional construction costs in energy savings on... Steve - here in Central new York only one of the walls truss out 2 '' 1! Are Designing heating systems as I recall it only costs about when did 2x6 construction become code %,. Trailer park in Hell, Alaska inches of SM gives you R10 on them for insulation!... thinking.. 35mm x 70mm...... yep.. sounds about right TERRIBLY hot summers ),! Between the sheething systems ( showing my age ) us older chippys mix.