地下室天花板绝缘
I am interested in insulating my unfinished basement ceiling. The primary reason I would like to do this is so that I can have separate conditioned zones since the temperatures between floors are not consistent. The main floor is about 2200 sqft, as is the basement. Currently there are only 2 registers feeding the basement and no returns. I calculated that the heat loss between the main floor and basement via conduction is around 9,000 btu/hr (R-value of floor is 1) when the temperature difference between the main floor and basement is only about 4 degrees F which it is usually at least that. The heat pump for my main floor is only a 3-ton and has difficulties keeping up when the indoor/outdoor temperature is more than 45 degrees. Eventually I would like to add a separate conditioning system to the basement once I finish the basement, but for now I was thinking about using some Roxul safe-n-sound in the ceiling and that should significantly reduce the heat transfer from the main floor to the basement.
请给我建议，关于这是否有效或我错了。
谢谢
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Their is already R-10 insulation on the walls that are unfinished without any framing. The basement is a walkout with a bunch of full sized windows and two doors. Like I said, there is typically at least a 4 degree temp difference between the two floors and I would rather not heat 4400+ sq ft with a 3 ton unit b/c it does not seem to be able to handle it when it gets cold outside and I would rather it not use the aux heat. I just want to know the downsides of insulating the ceiling (like if there will be water vapor issues) or if my math is wrong and I really am not losing at least 30% of my heating load trying to heat the basement that is currently only used for storage and mechanicals.
谢谢
For zone isolation "contractor roll" R11s or R13s snugged up to the subfloor is enough. Even if adding the insulation turned it into a 20F difference between the basement and first floor (it probably won't be that much), it's hard to rationalize more than R13.
R10连续绝缘仅满足IRC2015代码在4A/b和较低的区域中的最小值。4C区及向上呼叫R15。
https://up.codes/viewer/utah/irc-2015/chapter/11/re-energy-efficiency#N1102.1.2
Would you use faced or unfaced fiberglass as opposed to Roxul. How do they compare to each other for noise isolation as well. Any concerns with fire safety if I don't plan on sheetrocking anytime soon. Also, any concerns with vapor build up between the insulation and subfloor above it?
谢谢
Think cheap. Kraft faced fiberglass in long rolls is cheap, and will do the trick.
使用两个绝缘空间之间的绝缘层时，没有“蒸气堆积”。如果地下室太冷，以至于在真正的蒸气屏障上形成冷凝水，则意味着您的室内湿度高得荒谬，或者地下室是如此漏水，以至于它是一种冻结风险。
为了减轻噪音，您需要首先空气密封地板，并在不压缩它们或留下大间隙的情况下尽可能靠近地板（1/8“缝隙）（岩石岩）。
The better option is to insulate the walls. See this article for details://m.etiketa4.com/blogs/dept/musings/how-insulate-basement-wall