Pack of 100 Spray Foam Nozzles, Durable Spray Foam Replacement Tubes Nozzles Long Gaps Filling Insulating Foam . Thanks for your comments. The result is a more consistent temperature in your home. Christopher, I would like to find an obvious site in the vapor retarder that might be allowing cooler basement air to mix with humid air from the outside but I cannot find one. That's an unfortunate incentive for thinner walls. Insulation performance is properly assessed by reviewing the combination of air movement, moisture control, health, safety, durability, comfort and energy efficiency with SPF scoring high marks in all categories when applied in metal buildings. They almost always go by appraised value, with the size of the dwelling being one factor. I've heard of a few owners of energy-efficient homes who managed to convince the local assessor not to include the entire area of a thick wall. A primer may be involved. Its fluid-applied and expands 30 times its size within a couple of seconds. Do you have any thoughts on addressing the thermal bridging issue (and lower R-values at the wood framing) with T-studs vs. continuous exterior insulation? School System, Indiana, 112,000 . We use both open cell foam and closed cell foam. . Open cell foam is a semi-rigid .5 pound per cubic foot and is low density. Response to Antonio Oliver (Comment #8) Spray foam insulation costs $1.00 to $4.50 per square foot, depending on the type, R-value, and job size. Spray foam installers didn't understand the building envelope and sprayed either too little or too much. The friction is due to a lack of oil and lubrication. Our rigs travel throughout the United States. I can't say I want to tear off clapboard to see if there is some area deficient of Tyvek so I was hoping I could just create a better vapor barrier using closed cell spray foam. Consideration must be made to protect against contact with liquid and airborne chemicals developed during and shortly after application. Regular inspection, cleaning, repair, proper storage and maintenance are essential. (In much warmer or mor humid climates you might still need an exterior side vapor retarder, since the fiberboard may too vapor permeable to avoid problems in air conditioned buildings.). FROTH-PAK. We don't have an ultra cold climate. Install a thermal barrier or ignition barrier (coating, gypsum board, or other material) over the spray polyurethane foam insulation if necessary based on the material properties of the spray polyurethane foam or as required by code. Response to User-6881247 Pros: 1 thick spray foam has an initial R-value of 7.2 per inch and R-value of 12 at 2 thick. He has a B.S. The residential portion represents 5,000 square feet. Or will the gap in r-value between the foams still remain low enough that I should still consider open cell to the face? The closed cell portion appears to provide a nice way to address condensation issues, and it feels like it's an extra safety measure against water intrusion. To follow current & predicted outdoor dew point levels, Wunderground isn't bad: https://www.wunderground.com/forecast/us/ma/boston, (See the green line in the graph below the temperature line.). Cedar shingles We install foam over every type of existing roof, including metal. I just list some answers and comments, 1. (@ Rick Wertheim) It can be designed out. They can be raised, which will add additional cost instead of a lesser cost to cover. But with the product shortages and the supply chain issues currently going on, everything costs a lot more. Itll cover all the rust and stop the rust from progressing. John, Retail Center, Florida, 104,000 square feet. Can mice chew through Drywall? - Every additional inch of wall depth adds to my much too high NJ property taxes. A gallon of mineral oil can be ordered from chemical suppliers for around $25.00. When open-cell spray foam insulation is installed on the underside of OSB roof sheathing, the sheathing sometimes gets damp, A manufacturer of open-cell spray foam advises building officials to approve insulation that doesnt meet minimum R-value requirements, Two spray foam experts explain their preferences. The amount of foam you really NEED in a new home design is pretty small (if any), and going without doesn't necessarily have to be more expensive or lower performance. Your description is confusing, and there is a lot we don't know. You're right that spraying open-cell spray foam on the underside of roof sheathing can be risky. Even OPEN cell foam isn't the greenest or most sustainable solution. To understand why, we need to start by discussing the trimmability of cured spray foam. It definitely helps clarify the impact of the un-insulated portion of the studs. It seals gaps, cracks and holes where insects and pests commonly enter. And using rigid foam for dew point control is also greener than sprayed closed cell, but in new construction why use any foam at all? Froth-Pak 12 Spray Foam Sealant Kit . Like many materials found in a home or building, spray foam can ignite and burn if exposed to a sufficient heat source. Closed cell has blowing agents that off gas over time versus low VOC Icynene products. The table in my article accounts for the thermal bridging through the studs. Once this is done, youll be granted a brand-new warranty. Youll learn how it gets installed over a metal roof. That's 700% (7x) as much polymer, for a paltry net performance gain on the order of 10%. They are expensive, relatively hard to source compared to 2x4s or 2x6s, and require coordination with a plumber. Boston has had near-record July rainfall this year, and ground moisture levels are unusually high for the summer season. Metal shavings in oil are caused by friction of the engine's components. It just depends on the condition of metal the foam is going to adhere to. The SPFAs ISO-compliant Professional Certification Program (PCP) is available to all professionals involved in SPF installation and allows the contractor to demonstrate knowledge, skills and abilities. The facility includes a two-hour rated fire wall with IBC fire wall code certification, safely separating the commercial and living spaces. It rises in less than a minute and can be fully cured within an hour. Get your hand a bit closer when pointing up, and use a lighter trigger pull so you don't "bounce" the foam off the surface. I like that close cell would provide a little more "stiffness" as well as an interior barrier for moisture. It's also suitable for narrow and deep joints without additional moistening. Dont want to pay for a complete tear-off and replacement? The thermal bridging through your 2x6 wall studs tends to undermine any advantage from using spray foam between the studs -- as noted in the article above -- so I would recommend cellulose. Don't worry about leaving a 1/2-inch space between the cured foam and the drywall -- that 1/2-inch space will do no harm. 386. Hence footing a large bill! This is more common with closed cell foam, but it happens with open cell foam, too. Its a good cost-effective solution to any metal roof. Spray foam installers missed some of the air leakage sites. Assess weather conditions when applying spray foam. The first issue to clarify: Are you really operating a "sizable humidifier"? I wasn't planning on finishing it but had put up some plywood on the adjacent wall with the plywood attached to a double stud wall to keep vapor retarder intact. (Although the article I linked to discusses rigid insulation and fluffy insulation, the R-value ratios in that article also apply to the minimum thickness of a layer of closed-cell spray foam.). This won't delete the articles you've saved, just the list. Two coats of coating go down. Model # 12031908. UV rays will degrade foam within 72 hours, so any roofing contractor that does foam will install a coating over the top of the foam to protect it. Or is the MemBrain the interior finish material? Spray foam is a combination of two materials, a polyiso and a resin that get pumped from 55-gallon containers, through a hose that runs up the side of your building. A 32-ounce bottle of mineral oil can be purchased for around $7.00 at department stores like Walmart and Target, at pharmacies, and hardware stores. Shop All Men's Grooming Premium Shaving & Grooming Hair Care & Styling Cologne & Fragrances Men's Grooming Under $10. In this article, youll learn about spray polyurethane foam roofing. I can't say I disagree with that. Spray foam is a combination of two materials, a polyiso and a resin that get pumped from 55-gallon containers, through a hose that runs up the side of your building. I understand what you're saying here, but I guess I don't understand the role of thermal bridging then. The A-component contains polymeric isocyanates (or pMDI), and the B-component is a proprietary blend of polyols, blowing agents, catalysts, fire retardants, and surfactants. Thick walls can, indeed, have expensive tax consequences. Spray foam has an R-value of 6.5 per inch of thickness, which is the best of any roofing insulation out there. There are a couple of different kinds of coating. This calculation is close enough for the discussion at hand, but there are a few other fine points that quibblers will note -- namely, the contributions of interior drywall, exterior sheathing, siding, and air films on the interior and the exterior of the wall. So what is the convensional wisdom regarding TJI framing factor?Worst case scenario is a 3.5" flange at top and bottom and a 3/8" flange? a. I don't just have to rely on the tape and zip panels to provide a robust air barrier. Climate Pledge Friendly uses sustainability certifications to highlight products that support our commitment to help preserve the natural world. Also, metal roofs have a lot of seams. and this seems to be supported by the observation that the condensation is only seen when it is hot and humid outside and I keep the basement at 45% RH so there shouldn't be enough moisture in the basement air to cause a build up and there is no condensation in the winter. I'm assuming that this gap will eliminate the penalty due to cutting off thermal bridging and the closed cell would maintain its substantially higher r-value in this case? Among its many benefits, SPF can be used in any climate. 7. ft - or 0.8%. traditionally here they have used the framing dimensions from the plans and ignored siding, trim etc. For better options, see this article: "How to Design a Wall.". The residential portion includes a steel exterior skin but incorporates wood frame construction on the interior as a cost-effective solution. You may have to show your mechanic if the particles keep coming after the first fix. You can also enter "Bonfiglioli" into the GBA search box to find links to several Q&A threads on GBA discussing the Bonfiglioli approach. The moisture is coming from the outside as best as I can tell. The solar vapor drive is interesting and I didn't know it had a term. 0 My Cart . I've never heard of property taxes being primarily driven by house size. Open-Cell Spray Foam and Damp Roof Sheathing, Its OK to Skimp On Insulation, Icynene Says, Upgrading Five Common Building Assemblies, Webinar: Choosing Materials and Products for a Green Home. 3) Durability - Spray foam roofs are very durable and can last for many years. ACCOUNT CONTACT MY CART. The total assessed value of an area then gets multiplied by a mill rate so that the total taxes necessary are raised. The Center for the Polyurethanes Industry (CPI) offers guidance to contractors and builders handing spray foam. For more information on the Bongfiglioli approach, see "Breaking the Thermal Bridge". The Spray Polyurethane Foam Alliance (SPFA) and Metal Construction Association (MCA) technical bulletin, Spray Polyurethane Foam Insulation on Interior Surfaces of Metal Panels, provides guidance based on research conducted on the installation of SPF onto metal panels and is accessible via download at www.sprayfoam.org/technical/spfa-technical-documents. Respiratory protection for interior insulation requires the use of a supplied air respirator (SAR). If you shop around, you may find it cheaper than this. The best solution would be to remove the siding and install a continuous layer of exterior rigid foam -- but that's expensive. Theres a sweet science to applying good spray foam and when a contractor doesnt understand the heating, cooling, curing, mixing, pressures, temperatures, and adjustments that are needed to install a good spray foam roof, problems can happen. Not all open cell foams are created the same. In a 24" o.c. Profoam's new ProFill HD is a more affordable alternative to closed cell insulation. There is no evidence of water sneaking in from abovethe rim joist area is dry and I have checked ceilings on the first floor underneath the master bathroom to make sure nothing is coming down. After use, "Great Stuff" spray foam often seals itself and the can is no longer usable. Allow the foam to expand completely and harden before you start working with it. This topic makes my head spin. Because SPF is manufactured on-site during the installation, there are specific guidelines and measures that are mandatory to maximize product performance and to ensure safety for installers and facility users. Yes. If you want to leave a gap between the logs and your 2x4 stud wall, to allow room for spray foam between the logs and the 2x4s, then the larger the gap, the better. Note the Icynene open cell foam does not hold moisture in walls or attic assemblies. In the dead of winter, monthly energy comes in under $100 despite significant regional winter temperature drops, high winds and the buildings large size. 1. Safety Precautions and Personal Protective Equipment (PPE): SPF is formed on the job site by mixing equal volumes of two liquid components. If I did remove the membrain and fiberglass and apply at least 2" of CCF after the summer would it solve the issue? 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