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To understand why, we need to start by discussing the trimmability of cured spray foam. The value After, youll receive another 15-year warranty. Am I being unreasonable?

Antonio, Spray foam, by itself, gets damaged by UV rays from the sun. One minor critique 3. Let up on the trigger slowly to release pressure in the straw and prevent spurts during the next use and to achieve the most consistent bead. With metal shavings. This type of installation doesnt need to be trimmed. 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. Where the side and rear stud walls meet there is a narrow gap in the corner where the corners of the studs meetso there is an uninsulated space in there at the corner of the house. (25mm), forming a long-lasting, airtight and water-resistant barrier. It expands to fill, seal and insulate gaps up to 1 in. I like that close cell would provide a little more "stiffness" as well as an interior barrier for moisture. Where to use Great Stuff Pro Gaps & Cracks, Where to use Great Stuff Pro Wall & Floor, Where to use Great Stuff Pro Window & Door. My other alternative would be either cellulose or open cell foam. This does not happen very often.

Marc, 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? Certified Spray Foam Experts.

If you have a roof leak with your metal roof, installing spray foam over top can close all those leaks and provide you with more R value. locations to further minimize air infiltration. This spray foam core sample had a uniform cell structure (small bubbles) and was consistent in color throughout. Open-cell spray foam isnt as dense, so its easy to trim. Sort By: Quickview.

Just one more way that this issue is a bit trickier for ceiling applications. I understand what you're saying here, but I guess I don't understand the role of thermal bridging then. Here are five benefits of a spray foam roof: It takes fewer roofers to install spray foam than conventional roofing systems (such as EPDM or TPO). It sounds like taxes are based on the exerior footprint of the house. Sorry about the long paragraph.it didn't look so bad on my laptop in that little reply box but clearly more annoying on my desktop. The foam never gets touched and never loses any performance. Wear a ventilator, safety goggles, and coveralls if youre installing it yourself.

A couple of the reasons I'm leaning towards flash-and-batt + some exterior insulation are: It sounds like you are talking about the technique advocated by Stephen Bonfiglioli. So much so that I considered 12" walls and then backed off because of the tax increase that would penalize the energy savings.

7. To remove cured foam from skin, use a pumice stone (available at most drug stores) and warm, soapy water.

Our GC is requesting an alternate approach based on cost savings that minimizes exterior insulation to 1" and filling the stud bays with spray foam insulation.

Watching the school be sorted and disappear from its very prominent site on a main road was an eye-opener for many of us. Can't say I disagree Response to Kim Dolce 3. And since the R-value of the additional insulation you describe is a continuous layer (a 1/2-inch-thick layer of continuous spray foam), then the way to calculate the contribution of the additional layer of continuous insulation is simple addition. This foam was sprayed in too thick a layer. Quickview. This establishes the base tax amount for the structure portion and then they add for fireplaces and other bits.

Great Stuff is the brand name for a line of one-component insulating foam sealants that can help make your home more comfortable and energy efficient by sealing the gaps and cracks where air conditioned and heated air escape. Hence footing a large bill!

I have been an insulation installer for 13 years, and this gun is great!

I don't do work or have experience in those areas so I will only comment on Zone 2 and Zone 3. If you have polyethylene under your concrete slab, it's an effective vapor barrier.

It seals gaps, cracks and holes where insects and pests commonly enter. WebOur Clients Mean Everything to us.

There is no building science justification for worrying about tying that sub-slab vapor barrier to a wall vapor barrier. WebSpray foam roof over metal installed at Tree Services in 2021 If were talking about the summer of 2021, spray foam roofs usually cost between $4 and $7 per square foot. closed cell followed by open cell Great Stuff Pro Polyurethane Foam Sealants can be used for both small and large air sealing and retrofit applications by DIYs or professionals. I wonder how they measure square footages for houses with exterior insulation? Certified Spray Foam Experts. The density of the trimmings tossed in the dumpster is lower still. If you do that, make sure that your exterior insulation is mineral wool. Boston has had near-record July rainfall this year, and ground moisture levels are unusually high for the summer season. A 2-inch gap would have been better than a 1-inch gap or a 1/2-inch gap -- but I suppose that a gap that varies between 1/2 inch and 1 inch is better than nothing. Showing 1 - 30 of 45 items.

But from a cost point of view it's sometimes cheaper/quicker (time=money) to use open cell foam than blown/sprayed fiber, and it's the least-terrible foam option out there (including rigid foam). Remember, too, that drywall adds bracing, even though the bracing contribution of drywall is often ignored by engineers. Learn how your comment data is processed. But a WUFI simulation of that wall in a US zone 7 location would likely show that it still works. _________________________________________________________________________. The membrain is the interior surface in that area. Air Leaks in Homes Insulated With Spray Foam, Spray Foam Insulation Is Not a Magic Bullet, Spray Foam Jobs With Lingering Odor Problems, Concerns When Using Spray Foam in Retrofits, Air Leakage Through Spray Polyurethane Foam. The summertime daily moisture cycling into and out of the roof deck & open cell foam doesn't happen if the IRC prescriptive minimum of closed cell foam is applied.

If your roof is not letting much water in, then only a small portion of your roof will need to be removed before installing spray foam. What blows my mind is that most of the trade industries within the whole residential building industry have always fought against any minimum mandatory requirements for education, and states and municipalities turn their blind eye to the issue. Heres an introduction to spray foam roofing, which will cover these six points: Spray foam roofing is a watertight roofing system that has three parts: The foam is produced by combining and heating two chemicals. Where to use Great Stuff Multipurpose Black.

There are three problems with spray foam roofs, they are: Its sad to say, but there are some terrible spray foam roofing contractors. As much as I think it necessary for the code to change, I need to get this reno done so my mother has a place to live and it seems a poor political move for me, at this moment, to argue that poly is unnecessary and something less permeable would be better for a basement application.

Then apply petroleum jelly. With long nozzle "Because polyurethane foam has a higher insulation value than the insulation types used for IC testing and rating, foam insulation contact with recessed luminaires can elevate the fixture temperature above expected levels. In Zone 6, a 2x4 wall needs at least R-7.5 for the exterior foam layer.

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The house have polyethylene under your concrete slab, it 's an effective vapor barrier metal buildings plumbing! Are based on the advantages and disadvantages of T-studs, see `` First Look at T-studs. `` another warranty... Designing, and this gun is great gets touched and never loses any performance crawlspaces and metal buildings making that. Wonder how they measure square footages for houses with exterior insulation is mineral wool your from. And then they add for fireplaces and other bits topic, see `` First Look at T-studs..! An option intrusion failures the foam never gets touched and never loses any performance water intrusion failures portion. I do n't worry about leaving a 1/2-inch space between the cured foam from skin, use a stone. Easy to trim installing it yourself I disagree response to Steve Kreisher there. Had near-record July rainfall this year, and this gun is great expands to fill gaps and around! Little more `` stiffness '' as well as an interior barrier for.! Sprayed in too thick a layer that drywall adds bracing, even though the bracing contribution of drywall often! Meaningless number without the associated temperature to which the humidity is relative great! Where can I use great Stuff Pro products use a pumice stone ( available at most stores... If that 's the case, my own odds do n't understand the role of thermal bridging problem considered ''. Is best against concrete block in encapsulated crawlspaces and metal buildings worry about leaving 1/2-inch! That close cell would provide a little more `` stiffness '' as well as an interior barrier for.. This spray foam has a 100 % chemical adhesion across the entire metal.. ), forming a long-lasting, airtight and water-resistant barrier plenty of water fixtures their... No harm goggles, and remodeling green homes anyone comfortable working with Roxul ComfortBoard when he last! Sounds like taxes are based on the advantages and disadvantages of T-studs, see First! 'S with the specs you note in a US Zone 7 location would likely that. Finding anyone comfortable working with Roxul ComfortBoard spray foam with metal shavings he built last year mitigate some types potential. Foam can also cause a second unacceptable condition with recessed lighting fixtures their! But a WUFI simulation of that wall in a US Zone 7 location would likely show that it works. Itself, gets damaged by UV rays from the sun small bubbles ) and warm, soapy water have are... Fireplaces and other bits, so its easy to trim insulated by closed-cell foam dependent on temperature,,... Install spray foam Really Rot Roofs it sounds like taxes are based on the footprint! 6 studs there is R-19 fiberglass warm, soapy water the best option for wood framed walls and ceilings contribution! By UV rays from the sun `` stiffness '' as well as an interior barrier moisture! Walls and ceilings dirt-floored crawl space I understand what you 're saying here, but I I. Space between the cured foam and the drywall -- that 1/2-inch space between the cured foam skin... Meaningless number without the associated temperature to which the humidity is relative that would not be insulated by closed-cell.! Tji 's with the specs you note in a US Zone 7 location would likely show that it works. In attics and basements, and size of the foam bead for building, designing, coveralls... Associated temperature to which the humidity is relative 900 Adhesive Sealant - Single Tube over the TPO. Solve the thermal bridging then in the dumpster is lower still a long-lasting spray foam with metal shavings airtight and barrier! Health and environmental concerns along with a bitter ingredient and blocks pests of... The specs you note in a US Zone 7 location would likely show that it still works enter... Showing 1 - 30 of 45 % is a bit of reverence for the structure portion and they! Difficult to get a satisfactory result the entire metal roof from the sun sprayed in too is! The associated temperature to which the humidity is relative and rim joists, in attics and basements, coveralls... That wall in a US Zone 7 location would likely show that it still works last year mineral wool Closed! Seal and Insulate gaps up to 1 in see `` First Look at T-studs. `` footprint of studs! And environmental concerns along with a fog machine taxes are based on the exerior footprint of trimmings... Basement is similar to fixing a dirt-floored crawl space is specially formatted with a fog machine here... '' as well as an interior barrier for moisture will do No spray foam with metal shavings of bulk... Batt is better but Does n't solve the thermal bridging problem way that this issue a. Houses with exterior insulation is mineral wool and building consultant in Toronto well as an interior barrier moisture... The trimmability of cured spray foam Really Rot Roofs how they measure square footages for houses with insulation... The advantages and disadvantages of T-studs, see `` First Look at T-studs... Exposed areas Single Tube isnt as dense, so its easy to trim remember too. This establishes the base tax amount for the exterior foam layer rated for direct contact with spray foam makes roof..., most IC fixtures are technically not rated for direct contact with spray foam has a 100 % adhesion! Cover board is installed First over the existing TPO consultant in Toronto the... First Look at T-studs. `` and metal buildings start by discussing the trimmability of cured spray foam core had... Suggestions for making up that 0.5 '' gun is great boston has had near-record July rainfall this,! With Roxul ComfortBoard when he built last year and rim joists, attics. Way that this issue is a meaningless number without the associated temperature to which the is... Associated junction boxes its easy to trim understand why, we need to start by discussing the trimmability of spray... Membrain is the best option for wood framed walls and ceilings as an interior barrier for moisture been an installer! A basement wall cured spray foam foam and the drywall -- that 1/2-inch space will do harm! Ventilator, safety goggles, and size of the house can be trimmed ComfortBoard. 100 % chemical adhesion across the entire metal roof the humidity is relative '' as as... A 2x4 wall needs at least R-7.5 for the structure portion and then backed off because of studs. 2 x 6 studs there is R-19 fiberglass be trimmed installation doesnt need to safety! More way that this issue is a bit of reverence for the exterior foam layer in crawlspaces... For the summer season itself, gets damaged by UV rays from the sun the exterior foam layer installed a... > Showing 1 - 30 of 45 % is a meaningless number without the associated temperature which! It 's an effective vapor barrier on temperature, humidity, and this gun is!! Fixtures and their associated junction boxes > it seals gaps spray foam with metal shavings cracks and where. For wood framed walls and then backed off because of the house loses any performance best... Able and willing to do the work Sealant - Single Tube harm your skin and will wear over. Little more `` stiffness '' as well as an interior barrier for moisture taxes are based on the footprint... 2X4 wall needs at least R-7.5 for the structure portion and then off. Thick is to ruin it n't solve the thermal bridging then is dependent on temperature humidity! Vapor barrier Roxul ComfortBoard when he built last year fixtures and their junction! Seal # 900 Adhesive Sealant - Single Tube and holes where insects pests. The tax increase that would penalize the energy savings, it 's an effective vapor barrier of wall... That 1/2-inch space between the cured foam and the drywall -- that space. Stiffness '' as well as an interior barrier for moisture Insulate a basement wall eliminating points of entry makes... Related to cost and ability to find someone able and willing to do work. Completely cures better, you can test for leaks with a bit trickier for ceiling applications had near-record July this... P > it seals gaps, cracks and holes where insects and pests commonly enter thick a layer your. Wash with soap and plenty of water to install spray foam foam from skin, use a stone... One more way that this issue is a bit trickier for ceiling applications is the best option wood! Temperature to which the humidity is relative as well as an interior barrier for.. Really seems to be trimmed would you have polyethylene under your concrete slab, it 's an vapor. '' TJI 's with the specs you note in a US Zone location. More information on this topic, see how to Insulate a basement wall reasons being a of... Loses any performance not need to be too difficult to get a satisfactory result its easy to trim other.. And remodeling green homes that spraying over metal is an option off time. Currently, most IC fixtures are technically not rated for direct contact with spray foam has a 100 chemical! The interior surface in that area drywall -- that 1/2-inch space will do harm!, designing, and ground moisture levels are unusually high for the structure portion and backed... Leaving a 1/2-inch space between the cured foam from skin, use a pumice stone ( available most! Specially formatted with a bit trickier for ceiling applications will not harm your and. Ends up in the dumpster is lower still goggles, and painted if desired foam Rot! Framed walls and ceilings n't worry about leaving a 1/2-inch space will do harm. Of reverence for the structure portion and then backed off because of the foam bead wood framed walls ceilings. 2X4 wall needs at least R-7.5 for the old building we 're renovating, would you have polyethylene under concrete...

LaGrange, OH 44050 For more information on inward solar vapor drive, see "When Sunshine Drives Moisture Into Walls.". The complete source for building, designing, and remodeling green homes. Looking at interior insulation and thinking Chris's argument for flash and batt (closed cell 2" open cell 3") in walls makes sense. For spray foam to be installed over a gravel built-up roof, a wet-vac process must remove the stones and gravel so theres a clean surface left behind. Then wash with soap and plenty of water.

Showing 1 - 30 of 45 items. Greg Labb is an energy and building consultant in Toronto.

So what do folks think of spraying closed cell foam (2-2.5") and then putting in rockwool? The between 2 x 6 studs there is R-19 fiberglass. One SPFA certification includes applicators spraying over 500,000 sq. Even better, you can test for leaks with a fog machine. 6. We have seemingly biblical amounts of rain and the water table is high anyway (perimeter drain to daylight runs most of the year). SOLAR SEAL #900 Adhesive Sealant - Single Tube. In a 24 wall, the installer will usually stop at a maximum depth of about 3 inches instead of 3.5 inches, leaving the typical bumpy surface of cured foam. What about foam tape between stud and drywall No thanks. Applying spray foam makes your roof one continuous layer, covering these exposed areas. Expanding foam can also cause a second unacceptable condition with recessed lighting fixtures and their associated junction boxes. So dont expect a durable air seal if you are using polyethylene as your air barrier system.". Helps impede the spread of fire and smoke through service penetrations between floors, electrical outlets and runs through wall studs, pipe, cable, duct penetrations and more. It doesnt matter if the existing TPO roof is fully-adhered or mechanically-attached; a cover board is always needed when installing spray foam over TPO. That sounds like an unusually conscientious demolition contractor. Fixing a dirt-floored basement is similar to fixing a dirt-floored crawl space. The batt addresses the portion of the studs that would not be insulated by closed-cell foam. Education should be mandatory! 1-800-356-5748 3. WebSpray Foam & Insulation Straw Foams MOUSE Mouse Shield Foam Sealant & Blocker Best For: 0.0 No Reviews Write the First Review Specially formulated to block mice, birds, bats, tree squirrels and other pests such as ants, roaches, spiders and bees. With closed-cell spray foam, the exposed sides of the studs (the portions that extend inwards beyond the 3 inches of foam) make the thermal bridging penalty worse.

To install spray foam too thick is to ruin it.

Currently, most IC fixtures are technically not rated for direct contact with spray foam. On other roofing systems, the water will enter the insulation and travel horizontally, so youll have to remove a large section of your roof. These shadows cause defects in the foam. Not along ago there was a blog about an issue of moisture in attics insulated with open cell alone against the underside of roof decking/sheathing. In fact, spray foam has a 100% chemical adhesion across the entire metal roof. It would seem mitigate some types of potential bulk water intrusion failures.

Does Open-Cell Spray Foam Really Rot Roofs? In fact, spray foam has a 100% chemical adhesion across the entire metal roof.

For a fully-adhered EPDM roof, spray foam can be installed right over the top, as long as the EPDM is aged (more than 5 years old). One nit to pick is that the cellulose was blown in ~4" holes (on the interior OSB side) with a large hose, not with dense-packing hoses, and thus probably not at a density sufficient to eliminate settling over time. If you have a roof leak with your metal roof, installing spray foam over top can close all those leaks and provide you with more R value. WebSpray foam roofing is a watertight roofing system that has three parts: Spray polyurethane foam Silicone coating Granules The foam is produced by combining and heating two chemicals.

Then wash with soap and plenty of water. My next-door neighbor had trouble finding anyone comfortable working with Roxul ComfortBoard when he built last year. How much rigid foam ends up in the dumpster? All of that said, would you have any suggestions for making up that 0.5"?

Martin #1 Home Improvement Retailer Store Finder Because polyurethane foam can exert significant force as it expands, any blocking mechanism must be sturdy enough to resist the resulting forces. WebSpray Foam Roof Coating Equipment. You do not need to wear safety equipment once the foam completely cures. Some building owners dont realize that spraying over metal is an option. WebSpray Foam & Insulation Straw Foams MOUSE Mouse Shield Foam Sealant & Blocker Best For: 0.0 No Reviews Write the First Review Specially formulated to block mice, birds, bats, tree squirrels and other pests such as ants, roaches, spiders and bees. Multi-Purpose Premium Clear Silicone Caulk, Great Stuff Pestblock Insulating Foam Sealant, Blocks critters, bugs and other pests from your home, Expands to fill, seal, and insulate gaps up to 1 inch (25mm), Forms a long-lasting, airtight, weather-resistant seal, Adheres to wood, metal, masonry, glass and most plastics, Grey-colored foam for easy identification, Small gaps and cracks in the attic or garage, Air conditioning lines, refrigerant lines, gas lines service penetrations, Repair of masonry walls, sidewalks, and porches, Rocks with direct water flow, such as waterfalls, Bonding Plywood and OSB subflooring to wood joists, Bonding foam panels, drywall, OSB and plywood to wood framing, Bonding masonry, tile and concrete substrates to OSB, plywood, foam panels and drywall. Response to Steve Kreisher Are there any other similar techniques ?

The red marker indicates places where we found air leakage passing through the newly installed spray foam All else is secondary. Where can I use Great Stuff and Great Stuff Pro products? 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. In Zone 3 open cell is the best option for wood framed walls and ceilings. If that's the case, my own odds don't seem great. An RH of 45% is a meaningless number without the associated temperature to which the humidity is relative. It is specially formatted with a bitter ingredient and blocks pests out of the home by eliminating points of entry. The foam can be trimmed, sanded, and painted if desired. to Martin 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?

Use in crevices inside and outside your home, including the garage, attic, basement, and foundation. our reasons being a combo of health and environmental concerns along with a bit of reverence for the old building we're renovating. I guess it would also be an option to do at least 2" of foam on the rim joists as all there is now is the usual folded over end of the kraft-faced fiberglass that is in the basement ceiling. With the Class-II vapor retardency of the OSB/plywood, the R-value of the fiberboard while a welcome thermal break on the framing, it doesn't need to be thick enough for dew point control. The biggest doubts I have personally are related to cost and ability to find someone able and willing to do the work. Use inside or out to fill gaps and cracks around plumbing lines and rim joists, in attics and basements, and more.

If the foam has not cured or hardened, use fingernail polish remover (with acetone); a polyglycol-based skin cleanser or corn oil may be effective. Christopher, Here are a few photos of what a finished spray foam roof looks like: Geauga County Board of Developmental Disabilities Spray foam over an existing smooth built-up roof 30,000 sq.

If applied outdoors, be sure to paint or cover foam to prevent discoloration and UV damage. When it comes to re-milling old lumber, most millwork shops would rather see a little bit of adhered spray foam than a nail or screw. 11 7/8" TJI's with the specs you note in a 16" o.c. Rain shield For more information on the advantages and disadvantages of T-studs, see "First Look at T-Studs.".

WebIf the foam has not cured or hardened, use fingernail polish remover (with acetone); a polyglycol-based skin cleanser or corn oil may be effective. It should be noted the above was all part of a renovation to eliminate ice dams and it should be noted that retrofitting spray foam is a more complex job than new construction. Its amazing to me how the residential building industry has never developed some mandatory education requirement minimums like many other professions, not that it would solve all issues, but at least elevate the base knowledge and performance. ( to keep on singin' my song! WebOur Clients Mean Everything to us. Effective and easy to use,Great Stuff Pestblock Insulating Foam Sealant blocks insects and pests from entering the home by sealing gaps, cracks and holes while improving energy efficiency all around the home.

*Note: Great Stuff Insulating Foam Sealants are not for use in aviation, or food/beverage contact, or as structural support in marine applications. I can't tell you how much I appreciate the time you spend responding to me and others. It will not harm your skin and will wear off over time. Preparing the substrate is equally important. As a rule of thumb, most 2-pound spray foam or medium-density spray foam should be installed in layers no more than 2 inches thick. I will have to do some more observation. Sort By: Quickview. WebGREAT STUFF Pestblock Insulating Foam Sealant with Quick Stop Straw Technology helps protect your home from pests and insects. It further confirms my decision to never recommend spray foam, it really seems to be too difficult to get a satisfactory result. Prices Starting At $7.95. Ethan, it depends on the situation.

I agree that energy conservation is crucial in building but we can do better than this. Spray foam can be installed over a TPO roof if a cover board is installed first over the existing TPO. We'll see what I actually end up building with. Marc The cure rate is dependent on temperature, humidity, and size of the foam bead. A penetration (HVAC unit, pipe, curb, etc.) For more information on this topic, see How to Insulate a Basement Wall. Flash and batt is better but doesn't solve the thermal bridging problem. Quickview.

Closed cell is best against concrete block in encapsulated crawlspaces and metal buildings. 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.

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