开放单元V闭合电池
GBA Editor|发布绿色建筑技术上
几个月前，马丁和罗伯特·里弗森（Robert Riversong）帮助我思考了自己正在建造的新房屋中的选择。讨论的重点是我出于预算和其他原因做出了一些妥协的想法，这意味着我将安装代码最低隔热材料，并且不会解决热桥梁。考虑到这一点，我认为我对泡沫的使用，即闭孔或开放，主要是由防止空气浸润的驱动。预算问题加上精美的房屋建筑文章（2009年6月/7月），表明封闭和开放的牢房泡沫分别显示出大约3英寸和5英寸英寸的回报，这使我付出了3英寸的闭路和5英寸的价格。打开。我的问题如下：（1）开放单元是否需要蒸气屏障？（2）开放单元会随着时间的推移而保持吗？（3）考虑到这些警告，我还应该解决哪些其他考虑？
提前致谢
Al Charbonneau
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Whomever wrote that FHB article has clearly drunk the SPF koolaid. The only "diminishing returns" from increased SPF thickness are the financial returns to the supplier and installer, since they can't sell such an overpriced product in thicknesses required to meet or exceed code minimum standards.
如果将任何绝缘材料的厚度（并因此）加倍，则将导电热量损失减半（当然忽略热桥梁）。这是简单的物理学，所有泡沫制造商都知道这一点。但是他们已经繁殖（这与宣传是相同的根源）错误的想法是，真正良好的绝缘水平没有热优势。
是的，开放单元需要蒸气屏障。我们根本不知道任何喷雾泡沫的耐用性或寿命，尤其是那些在无限可变条件下使用的地点的耐用性或没有质量控制的那些泡沫，但是所有塑料随着时间的流逝而失去了增塑剂，并且扩大的泡沫会随着时间的流逝而失去其低电导性泡沫性泡沫性泡沫状态（这些代理中的一些对人或环境有毒）。其他考虑因素是，石化塑料是不可再生的，环境毒性的，不可降解的，并且是地球上最伟大的祸害之一。
As I've said umpteen times before: there is nothing green about plastics. Zip, zilch, nada.
Al,
The usual question:
1.你住在哪里？蒸气延迟问题的答案取决于您的气候。但是，如果您要在墙壁上安装绝缘材料，并且如果您的墙壁上覆盖着油漆的干墙，那么在美国任何地方都应该很好
2. "Code minimum" means different things to different people. Three inches of closed-cell foam provides about R-19 or R-20; while 5 inches of open-cell foam provides about R-18 or R-19. That isn't much in a cold climate, but if you live in Texas or Florida you'll probably be happy.
As I've written before, it's too bad that the FHB article on spray foam insulation added to the widespread confusion about the "diminishing returns" of thick insulation. Those of us who have been promoting superinsulation techniques since the 1980s have been trying to convince builders and homeowners of the advantages of very well insulated envelopes. Unfortunately, the spray-foam salespeople have been working diligently to convince people of the opposite idea -- the acceptability of thin insulation.
Martin I am glad to see you have upgraded Texas and Florida from "R-10 is probably plenty"
Maybe 40 years from now the idea of Superinsulation in Hot and Mixed Climates may not be so ridiculous.
John,
Actually, all you really need in a hot and humid climate is a loincloth and a hat.
Robert,
我仍然认为“更喜欢户外活动的勒罗伊”可能会让您“淘汰”
//m.etiketa4.com/community/forum/energy-efficiency-and-durability/15460/pv-peak-demand-and-beopt
;-)
我一直怀疑Leroy可能是Martin的Altergo
or perhaps Michael Chandler
come on Leroy ......Fess-up
马丁：
回答您的问题
(1) Rhode Island
(2) R 19, R38
我对减少的返回图的起源感到好奇。IT行业发展了吗？我们地区的SPF销售人员将卖给我的销售量与我将购买的闭孔或开放式隔热材料一样。
I feel like I am speaking with Moses and asking the question "Could you get along with two commandments?" As I said previously, we have had to make a series of decisions which put us where we are. The new house replaces an old house that had a max of R13 fiberglass and no air barrier. At least we are moving up, however slightly. If I had it to do all over again, I would have not planned as much on SPF because it seems that the way to go wrap the house in rigid foam.
无论如何，如果我在墙壁上搭配开放的牢房泡沫和大教堂的天花板都在1/2英寸的石膏板上和石膏板上，你们建议使用蒸气屏障？闭孔，您不建议使用蒸气屏障吗？
Enjoy the discussion and website.
Al Charbonneau
AL：很抱歉得知您不在Bill Gates俱乐部，不得不妥协；那是生活的主题，不是吗？问题：除绝缘材料外，还有其他地方吗？我个人的看法是一个绝缘怪胎，是试图在其他地方弹sk。也许不戴上壁板，或者也许没有完成几个房间，登上一些窗户并在明年购买，一年少浴室...等等。您以后总是可以完成房屋；我很容易说，对吧？无论哪种方式，祝您房子好运。约翰
Al,
If by "vapor barrier" you mean "polyethylene," I would always omit it in Rhode Island. If you end up using open-cell foam, the latex paint you install on top of your drywall will be your vapor retarder.
If you can possibly afford it, maybe you'll consider 5 inches of closed-cell foam.
是的，您是正确的，“退货减少”图表以及臭名昭著的R值栏图，将各种R值选项与未绝缘帐篷的性能进行了比较 - 是由喷雾泡沫行业开发的。要阅读比您在这个问题上介绍的更多，请访问
//m.etiketa4.com/blogs/dept/musings/it-s-s-ok-skimp-skimp-insulation-ycilnene-says