什么是最好的方法绝缘金属结构从内部?
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什么是最好的方法绝缘金属结构从内部?
Jacky Surber
May 2, 2021Last updated: May 25, 2021
你好。我非常担心我最近购买的所有金属家庭套件的适当绝缘，钢结构和螺柱，屋顶和壁板。金属壁板作为纯粹的墙，所以我不能在壁板和外部螺柱之间绝缘，除了包括一个非常薄的泡沫蒸汽屏障。我读过这里所有的文章都说由于热桥接，空腔绝缘不会很好地工作。闭孔喷雾泡沫呢?那将工作在螺柱&可以通过喷雾泡沫拧干墙或将混乱的热打破?或者在干墙之前在螺柱内部安装EPS泡沫板?我需要R38在屋顶(4:12间距)和R21在6“x 10' H外墙。计划在房子的大部分大教堂天花板(2052平方英尺)和685平方英尺以上的9'天花板。我很困惑这个设计是如何通过CA的第24题的，并强调我的设计很糟糕，无法通过第三方验证。 Thanks so much for any help.
Switching to closed cell foam would not make a difference, the type of insulation changes nothing. It’s a simple matter of having metal pass through the thermal envelope every 16 to 24 inches around the entire building, which can reduce the ‘effective’ R value of whatever insulation is there, by as much as 25%. So you can think of insulating between metal studs as if you were paying a 25% premium on the cost of insulation, since you will only be getting about ¾ of the performance you paid for.
当潮湿的空气遇到墙中的冷点时，热桥也会导致凝结。Here is our page about thermal bridging, check this out first –
Thermal bridges and thermal breaks – how to build energy efficient walls
The fact that you are in California means the stakes are probably a bit lower for you, as you are likely in an area where it is quite dry I assume? Condensation therefore isn’t a problem. Also it is not as extreme a climate as if you were in the northern states or Canada with really hash winters.
And a question back to you, what does the manufacturer say? Ideally you would have a seamless blanket of insulation surrounding the home either inside or outside of the metal stud wall, that would be the best design. And the idea that you cannot insulate outside the metal or risk wind shear, is that the recommendation from the manufacturer?Adding insulation to the exterior of walls is very common, so I’m not sure how that would negate the structural integrity of the frame.
And honestly these aren’t issues a homeowner or even a builder should have to concern themselves with, since a manufacturer should have the solutions to provide you. And as for 3rd party verification, that should be resolved ahead of time in the permitting process so that by the time you start building you know for sure you will pass inpection if you follow the plans. If you give us a few more details we can probably help more, but I think your first step is to find out what the manufacturer suggests.