新家:墙面设计帮助
好的,所以我们很快就应该已经解决了细节,但这里有......
我们有一个新的家庭正在建设中,在我们说话时,破碎机正在铺设屋顶。我们在PNW(区域4c),并有2×6墙。它们的设计和设计有16英寸中心的铆钉。我希望我们有24英寸的中心,但不想回到工程。它们用7/16胶合板张开了。目前的计划是使用Tyvek排水瓶,一英寸的刚性泡沫,3/8英寸雨屏,以及纤维水泥板或雪松面孔覆层。在浏览墙/窗口的细节和GBA上闪烁时,我发现的每个人都显示出作为护套和防水屏障的泡沫。所以它让我想知道:我的墙设计从根本上有缺陷吗?如果我有泡沫,我需要一个WRB吗?它会导致问题这会这样做,还是冗余? And finally, where can I find details drawings for the window flashing for MY wall? I am going to do the exterior envelope myself, so any help would be greatly appreciated.
谢谢,
戴夫
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答复
您提出的方式是常见的并且运作良好。窗口详细信息称为“Innie”样式窗口。在泡沫的最外层位于WRB(和窗口)的对应部分被称为“outie”。搜索这些条款应该在GBA和Web的其他地方给您提供大量信息。这是一个以GBA文章从://m.etiketa4.com/blogs/dept/musings/innie-windows-or-outie-windows.
是的,你真的需要一个WRB,无论你使用什么类型的泡沫。如果这是一个有24个“屋顶悬垂的1层,但即使那么盎司预防速度超过了一磅治疗,那么每世纪的一个大风暴雨,那么每世纪的大风暴雨,那么你可能会离开它壁板。
关于泡沫:箔面积的Polyiso在XPS上具有一点性能边缘,并且是由于所用吹风剂的差异导致的更环保的产品。用FSK胶带密封面板和任何东西都是快速的。带有箔片面板,Studwall和护套只能朝内部晾干,但在护套外部的r6 +上,〜R20在空腔中,您将从露点/冬季湿度累积的角度下进行。(IRC 2012处方为2x6 / R20施工外部R的R3.75分钟。)
A 16" o.c. studwall typically has a ~25% framing fraction, and with either the fiber-cement or the cedar-ply siding you'd have a whole-wall R a shade north of R20 in that stackup. If you went with an inch of type-II EPS (R4.2-ish) instead of iso you'd still be above the IRC prescriptive value, but your whole-wall R would be about 10% less. With only an inch of EPS on the exterior the R value of that foam would be about R4.5 at a zone-4c mean January temp, but only ~R4-ish during the mean July temp, but it would also have considerable drying capacity toward the exterior more than 100x that of foil faced iso, and 2-5x that of XPS. So despite slightly higher wintertime moisture accumulation as compared to polyiso due to it's lower R, the additional drying capacity makes up for that. Either makes a fairly resilient assembly.
在螺柱腔中喷涂或密集包装的纤维素也增加了组装的水分弹性。