连接车库的绝缘墙
kevek101|Posted inEnergy Efficiency and Durabilityon
Hi I just wanted to double check my thinking here with the pros. Got a 50s prefab cape in VT. An addition was built ooff back of house connecting existing garage to house. They now share a wall. On the house side it’s 2x4framing with batt insulation and a vapor barrier on conditioned side of house. On the garage side it’s now 3/4 sheathing (yup 3/4) and 2×6 framing. Looks like the garage sheathing between house may have house wrap on it.
我正在考虑在车库的螺柱之间添加5_1/2岩盘。车库窗台板上（未填充）CMU，下雨时车库通常会变得非常潮湿。我有点担心在该墙壁系统中捕获湿度，因为它本质上是双螺柱墙，两者之间的护套以及其中一个墙壁上的蒸气屏障。可能会在车库侧增加隔热材料，以防止框架和护套干燥。
总体而言，这房子是相当有效的，所以我不一定需要车库和房屋之间的隔热材料，我只是在寻找令人震惊的质量。
Thoughts?
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在组件的2x6侧增加隔热材料将使冬季保持3/4英寸的温暖，以减少水分含量。
只要您不将任何太紧的蒸气紧紧地放在车库侧（墙板上的乳胶油漆很好），那就不会有问题。
最佳声音抑制第一次仔细地空气al any penetrations of the 3/4" sheathing, and caulk the perimeter of each stud bay to the sheathing. Then rather than installing a full cavity fill install some 3.5" thick R15s in the middle, with an inch of space between the batt & sheathing, and an inch of space between the garage-side gypsum, making sure that the batt makes good contact with the framing- no gaps, and minimal or no contact with the plywood or gypsum. Air-seal any electrical boxes and wiring penetrations of the framing, and air seal the boxes to the gypsum board. Taking it a step further, caulking the gypsum to the framing with Green Glue™ can also make a difference.
Thanks Dana. That makes sense. The insulation on the garage side would moderate the cooler temps from the garage before they hit the warmer surfaces of the framing on the house. I just wasn’t sure if the house wrap between the garage and the house would have any effect.
关于隔音，我在墙壁上混合了2x4和2x6螺柱。除非我使用刚性玻璃纤维或岩石板板，否则可能很难在两个不同大小的螺柱的中间进行绝缘材料...我认为它们往往只有两英寸厚2x4，就在墙壁中间，两侧留有空气屏障。是否认为两个空气腔不仅会削弱一些隔热材料？
Kevek，
达娜回答了您的隔热问题。但是我担心您提到的另一个问题：“车库下雨时通常会变得非常潮湿。”
I'm guessing that your garage has insufficient roof overhangs, or that the grading around your garage is flawed. To address these issues, you may need to adjust the grade on the three exposed sides of your garage so that the grade slopes away from the building. If there is an "uphill side," you may need to install a swale to interrupt water that comes down the slope.
最后，如果您要隔离车库的墙壁，请记住，您需要在平板周边安装垂直刚性泡沫。两英寸的刚性泡沫（理想情况下，EPS）效果很好。泡沫应至少宽24英寸，并且应从平板的顶部延伸到土壤中。（您必须在车库周围挖一个沟槽才能安装此泡沫。）请记住，您需要用耐用的材料保护上级泡沫，以防止阳光的身体虐待或退化。您还需要在泡沫顶部和最低壁板的水平接头处进行金属Z刷。
这种刚性泡沫将有助于在冬季保持热量。这也将有助于防止您的平板在暴雨期间吸收水分，这将有助于解决车库中的湿度问题。
Kevek，
Q. "I’ve got a mix of 2x4 and 2x6 studs in the wall. Might be difficult to get insulation right in the middle of the two different sized studs."
答：在有此问题的墙壁上，在2x4s的边缘安装2英寸乘2.5英寸且与螺柱的垂直条，以制作干墙的共同平面表面。然后，可以用5.5英寸厚的烤面包将螺柱托架隔热。
我描述的垂直条可以由软木木材制成 - 在您的桌子锯中运行一些框架碎屑 - 或刚性泡沫。如果使用刚性泡沫，则需要长的干墙螺钉来填充2x4。
I think the humidity in garage is partially due to grade, but I’m not at bottom of a hill and the soil is sandy so any damp from slab drys quickly. However it could also be from condensation, but that’s getting into a completely different topic. I know how I may address grade so there is more positive drainage, but I wasn’t sure about rigid in ground on outside of block wall. I should add the block only sticks out of ground by a few inches. There isn’t much of a stem wall. Also I only have access to two sides of garage foundation. The third side is covered completely by driveway, and forth side is shared with house. Any value in insulating just two sides of foundation when most of it is below grade?