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关于创建条件阁楼的问题

约翰·戴维斯|Posted inEnergy Efficiency and Durabilityon

我一直在阅读Martin的其他问题和文章,我认为我对自己的选择有所了解,但是我真的觉得我需要一些专家建议。我在芝加哥(5A区)的郊区,刚刚买了一栋带有阁楼的房子,该房子基本上是在三楼建造的,上面有一套楼梯。它有8英寸的after子,目前已排气。实际上,夏天很热,很容易超过120度。阁楼的地板是绝缘的,并在其上面有胶合板,因此当前的热封底位于2楼的天花板上。我想用喷雾泡沫将其隔离,以使其成为条件的阁楼并密封通风孔。我有几个承包商出来了,他们俩都说在这种情况下,他们宁愿使用开放式牢房。有了开放的单元格,他们相信如果有泄漏,我将能够快速发现与闭塞牢房相比。

我给每个人的问题is what is the best way to insulate this space with the understanding that I would want to finish it in the near future? Additionally, I would want to diminish any thermal bridging and provide a thermal break by installing 2″ foam board (is 2″ necessary? can I do 1″?) on the rafters after the spray foam goes in and before the dry wall goes on, maybe in a 2nd phase before I put up drywall. Would an ignition barrier be needed right away? What is the most scientifically sound way to insulate here? Would using closed cell on the knee walls (3.5″ deep) be advisable? I’ve provided pictures below and also have provided pictures of what looks like a metal chimney pipe, I read somewhere on here that there needs to be a gap around the pipe of an inch or more? I’m not actually sure if it’s used as the furnaces and hot water heaters vent outside. Bonus question on finishing, it probably makes sense to run any electric for lighting and outlets/switches before I spray foam, correct? Thanks in advance for your responses!

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答复

  1. 史蒂夫·纳普(Steve Knapp)CZ 3A佐治亚州||#1

    约翰。我认为您需要收集其他信息。您至少需要R-49才能在您的气候区域满足代码。你的屋顶怎么样?您会考虑将泡沫放在护套上和reOOF上吗?

    Also see this article for more info://m.etiketa4.com/articles/dept/musings/how-install-rigid-foam-foam-top-frof- sheathing

  2. 约翰·戴维斯||#2

    嗨,史蒂夫,谢谢您的答复。我阅读了有关屋顶护套顶部的刚性泡沫的链接文章。我的屋顶大约8岁,形状非常好,有25年的建筑带状疱疹,所以我目前对重新启动不感兴趣。根据您的建议,我需要收集什么其他信息?我知道该建议正在实现R49,我应该能够用闭孔喷雾泡沫来处理8英寸的afters。但是,这对热桥梁无济于事。鉴于我当前的当前情况,任何建议是正确的建议情况?谢谢!

  3. GBA编辑
    Martin Holladay||#3

    约翰,
    首先,关于烟囱:如果您直接在烟囱穿透下查看房间,则应该能够弄清楚烟囱配备的设备。如果该烟囱下面的任何地板上确实没有设备,则可以安全地卸下烟囱。

    八英寸深的after是不寻常的。您确定它们不是7 1/4英寸深,还是9 1/4英寸深?

    按照您提供的限制施加的逻辑:
    1.您不想将此屋顶组件与外部隔离;
    2. This is a hipped roof -- in other words, a roof that is incompatible with a vented roof;

    。。。here's what I would recommend:

    1.将3英寸的闭孔喷雾泡沫安装在屋顶护套的底面(提供5号区域所需的可侵蚀性绝缘的R-20)。

    2.通过在现有afters板下方的更多框架材料上扫描或通过某种类型的交叉搭饰,将after湾加深3英寸。这个想法是在after子和框架成员之间引入热中断,以支持您的天花板。

    2. Install 8 inches of dense-packed cellulose on the interior side of the spray foam to provide the R-29 insulation that you need to hit R-49.

    这是一篇文章的链接,其中包含更多信息:如何建造绝缘大教堂的天花板

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