老房子 - 绝缘地下室天花板与边缘托梁？
Hi all,
感谢大家，我有一个不错的喷雾泡沫状态的阁楼空间，现在支持我的交流设备。它很棒。
现在到地下室。这所房子是波士顿地区125岁的Foursquare类型。它有一个野外石头粉底和部分完成地下室。地下室的地板是水平的，环氧化，最近将墙壁指向，石灰涂层并看起来不错。没有水或水分问题。我们将其用于健身房和车间。一楼地板是原始的硬木，没有地下。它的形状主要很好，但是在一些景点，如果您发光光，您可以从地下室看到它。例如，地板不牢固。
From the previous owners, the basement ceiling is packed with fiberglass batting and covered in tyvec. Mice have been in it for awhile so you can see mouse poop and urine stains on the tyvec. Occasionally you can hear a mouse running around. It’s nasty and all has to go.
My goal is to get rid of the funky old insulation, maintain the first floor temperature, seal the house better against mice and air, and use as little labor/materials/effort as reasonable. I’m ok if the basement continues to get down to around 55F, but of courser warmer the better.
问题是，我是否可以重新弥补地下室天花板，还是可以消除所有这些，只是用2英寸的刚性板隔离周围的边缘托梁，然后将泡沫喷在罐中？冬季，它永远不会在地下室中的55鱼低于55鱼，蒸汽锅炉确实散发了一些热量。我真的不想隔离整个墙壁，因为这似乎很参与，我们会失去地板空间。我想最坏的情况我可以尝试进行轮辋托梁，并稍后再添加天花板隔热材料？
万分感谢，
Dan
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答复
Glad you have a rim joist at that age instead of the joist buried in the foundation like I run up against. That 55F still has a big delta T if you keep the upstairs at 70ish in winter so heat is going down as well as up with air leakage. Insulating the band (rim) "boxes" will certainly help. I usually drywall basement ceilings and blow in cellulose to within 2' of walls around the perimeter. I'll use fiberglass batting at the outboard perimeter so that we can get to plumbing and wiring along edge if needed (or new mice holes).
这是一个有趣的主意。因此，您认为绝缘地下室天花板仍然是必经之路吗？我想即使我这样做，我仍然想密封/隔离轮辋托梁？我需要确保我密封任何老鼠的进入孔，否则它们会在吹纤维素中拥有一个快乐的家。
There is no problem insulating the rim joist with rigid foam panels and canned foam. I like EPS for this purpose since it allows a little bit of drying since EPS is more vapor open than XPS and especially foil faced polyiso. Cut the rigid foam panels a little small, leaving about a 3/8-1/2" gap all the way around. It helps to cut the edges with a bevel too, which makes the canned foam push the panels against the rim joist instead of trying to pop them out. You want to avoid any air space between the rigid foam panel and the rim joist. A hot wire cutter is the best way to cut the foam.
I like to use Loctite's Tite Foam to seal in these insulating panels. Tite foam is a little more dense and tougher than the regular Great Stuff product. Tite foam also costs quite a bit more, so keep that in mind if you want to use it.
I find it helps to cut pieces of wire to hold the panels in place while foaming. I cut pieces of 12 or 10 gauge copper wire an inch or two longer than the gap between joists. I place a foam panel against the rim joist, then a I press in a wire so that it locks against the joists (the ends bite into the wood a little), and holds the insulating panel in with spring force. I then adjust the position of the panel until the gaps are fairly even all the way around. I set all the panels like this, then make a second pass to foam them all in place. Doing it this way lets you do the foam rapidly so that you don't have issues with foam setting up in the straw. It goes fairly quickly once you get started -- cutting all the foam panels takes most of the time.
Bill
Great info, thanks. What is your take on how the insulated rim joists will perform compared to the old basement ceiling insulation in terms of heating efficiency of the house (1st/2nd floor) itself?
The two areas being insulated aren't entirely comparable. Basement ceiling insulation is there to insulated the conditioned living space from what I would assume to be an unconditioned basement. That does work, but is not idea.
绝缘边缘托梁是一个好主意，但是当完成而不是绝缘天花板时，您还应该真正将地下室墙壁隔离，以将现在有条件的地下室与无条件的户外隔开。这个想法是隔离所有表面，这些表面是条件生活空间与无条件的户外活动之间的接口。仅靠边缘托梁绝缘就会使地下室的墙壁失去热量。
您当然可以暂时仅隔离轮辋托梁，并获得更好的绝缘和空气密封的边缘托梁的好处 - 请记住，众所周知，轮托托梁是空气泄漏的，因此密封它们确实有好处。对于完全绝缘的空间所需的任何地方，您都不会绝缘。
无论您是否打算在某个时候隔离地下室墙壁，我都会亲自隔离轮辋托梁。与隔离地下室天花板相比，绝缘边缘托梁和基础墙通常在性能方面要优越。
Bill