Comparing Closed-Cell Spray Foam Manufacturers and Suppliers
You have told us that the chemicals are in short supply or not available at all for closed cell spray foam, My project involves mostly closed cell so, I’m trying to understand the facts about the quality of the product I will be putting in my framing cavities. I understand that Honeywell is the major supplier of the blowing agent for closed cell and currently they are not able to provide it. I was told by Victory Polymers that unless the insulation Contractor has his own stock no new stock is available. Should I be concerned about which spray foam brand name the Contractor is using as long as it is closed cell or open cell? I would really like to use a closed cell that is using HFO as a blowing agent, due to the higher R value. But from what I hear it is completely unavailable. Looking at their specifications the R values differ slightly other than that I don’t know what I should be concerned about regarding the different makers? So far it seems most of the local installers are using Victory or Thermoseal.
Thank you, Kevin
GBA Detail Library
由气候和房屋部分组织的一千个建筑细节的集合
答复
The R values should all be pretty similar. If your goal is maximum "greeness", then the blowing agent is more important. If your goal is just to get your project completed on time, then the R value of most spray foams is pretty similar, especially when you consider aged performance. All spray foam insulating value drops off a little with time as the blowing agents diffuse out, so most of the difference in R value is a different in initial R value only, which isn't as important over the long term as aged R value.
关于the best you'll see claimed for closed cell spray foam is around R7/inch or so. I typically use R6/inch for planning purposes regardless of claimed performance by any particular manufacturer.
顺便说一句，如果您使用开放式电池而不是闭孔，则可以获得更多的喷雾泡沫，因此，如果您的材料可用性很紧，则可能需要评估项目以查看开放单元的工作原理。例如，我通常建议不要在未通风的屋顶组件中使用开放式牢房，但是如果您喷洒泡沫的墙壁，开放式牢房通常是一个不错的选择（请注意，墙壁比喷雾泡沫更好的选择）。
Bill
开放式电池还可以怀疑以下（例如，地下室墙壁内部或爬网墙的低于级别的部分。尽管有些人看起来不错。（例如，在此讨论中：//m.etiketa4.com/question/crawl-pace-open-cell-spray-foam).
Hi Bill,
Thank you for your advice. You mentioned there are better options for walls. The reason I'm considering CCSF is the odd sized 2" x 4" wall framing bays and beam joist bays. the house was built in the 1800s and needed a lot of squaring and plumbing. as well as air sealing. There is no exterior sheathing, just clapboard nailed to the studs, however the house was resided over the clapboard with a layer of felt paper and asbestos / cement board finished siding composed of 2 foot by 1 foot pieces. Please do tell me what you think might be a better method of insulating the walls and beam joist bays
Thank you, Kevin
If you are concerned about the building beyond 8 years, I'd use more like R5.6 for CCSF.
It looks like HFO foams have double the shrinkage of HFC.
>"It looks like HFO foams have double the shrinkage of HFC."
我没有听说过。如果是这样，如果使用HFO吹出的泡沫，我将更加关注随着时间的推移将泡沫分离出来。
Bill
Hi Jon R,
Thank you for your advice. So you are saying for CCSF I should use R 5.6 for the real per inch calculation for the long term life of the project?
Thank you, Kevin
So the components of closed cell spray foam can be added to the list of short supplies?
这是一种轻描淡写。即使是大SIPS制造商也无法掌握制造尿电烷泡沫的组件。因此，听到小承包商在任何地方都找不到它，我并不感到惊讶。最近几个月，我一直在与SIPS制造商合作，并且不得不切换面板类型3次，因为现在他们也无法购买GPS（石墨增强EPS）泡沫核心。您仍然可以获得的唯一一件事就是EP。
HFO is advantageous mostly for avoiding the huge climate impact of HFC.
If you can't get that, I'd look at using a mix of open-cell and rigid foam--polyiso, EPS, GPS, or perhaps NGX. What are the specific places where you need closed cell spray foam?
From the articleUsing Closed-Cell Spray Foam: There is a more environmentally friendly option, a closed-cell foam that uses an HFO (hydrofluoroolefin) blowing agent called Solstice, made by Honeywell, which is a much less potent greenhouse gas. Equivalent to carbon dioxide, it still has higher embodied carbon and is more damaging to the environment than most non-foam insulation, but it’s better than conventional closed-cell foam. Several brands and product lines of foam are now using this blowing agent, such as Lapolla Foam-Lok 2000 4G, Demilec HFO High Lift and HFO Pro, Icynene ProSeal HFO, and EcoBay from BaySeal.
Hi Kiley,
Thank you for your advice. Do you know if the products you mention are available in the New York State area?
Thank you, Kevin