Upgrading Insulation
我的问题特别涉及我的故事和半房子的倾斜区域。我有机会升级该领域的绝缘材料。我住在第6区。将从外部和新的屋顶上获得访问权限。不幸的是，就像我附近的大多数房屋一样，afters是2×4的建筑。目前，绝缘是倾斜区域中的香脂羊毛绝缘材料。The plan is to expose the slant portion when getting the new roof by removing the roof sheathing in the slant area and then removing the insulation and installing 3.5’’ of XPS insulation in the stud cavities with all seams sprayed with canned foam although this is not enough insulation, it definitely is an improvement over the current situation.
Here is a link which closely resemebles my situation. This about the size of my knewalls and the slant portion in my house is only about 4’
http://thumbandhammer.com/projects/attic-3.html
特写
http://thumbandhammer.com/projects/images/attic/guestfiredamage.jpg
I clearly understand this is not enough insulation in this area. And to do this correctly I will need to remove the sheetrock on the interior and increase the framing depth to allow for more insulation. However at this time money does not allow for this as it requires a complete remodel. I would like to at least use the opportunity of the roof being removed and having access to this area WITHOUT having to disturb the interior living space.
我的问题是：
Would using XPS in these stud cavities be acceptable?
Would polyisocyanurate rigid insulation be a better choice?
我了解SPF闭路是一种替代方法，但是，因为我没有足够的深度框架来实现理想的r值，因为SPF是最昂贵的，这将是浪费金钱。
在这样的链墙上……。建议的R值是什么……我想脊区需要更多的绝缘。这些被认为是墙壁或天花板还是两者兼而有之？
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Replies
多发性硬化症，
能源代码没有区分平面天花板 - 它们都是天花板 - 区域9的要求为R -49。但是，如果after脚的深度不足（您的afters必须比2x4更深），则可以使用R-30，不超过500平方英尺或总天花板区域的20％，以较少者为准。
如果您要剥夺屋顶，我建议将香脂羊毛（纤维素棒）放在适当的位置，并安装4“ -6”厚的刚性泡沫钉钉面板（通常是EPS带有OSB的一侧），然后重新固定屋顶。如果您想要一个通风的屋顶（总是一个好主意），则会有一个自动通风的钉子面板，由多丝氰尿布酸盐制成，称为cool-vent ii。
This will bring you to or close to IECC standards and won't require any interior renovation.
M.S.,
Although Robert wrote "zone 9," I think he meant to write "climate zone 6." In climate zone 6, you need R-49 ceiling insulation. That means about 14 inches of EPS or 7 1/2 inches of polyiso.
在您的情况下，您应该在屋顶的顶部安装刚性泡沫 - 覆盖整个屋顶。然后，您应该安装新的屋顶。
感谢您的回复。我已经调查了XPS在原始护套上的想法，但由于几种不同的原因，它不可行。其中之一是2x4 afters是否可以支撑绑带的额外重量和另一层护套
Would insulating between the slants with XPS cause any issues besides lack of R Value? I revert back to the simple premise that I should at least make an attempt to do something while I can access this area. Although your suggestions are what ideally I would like to do they are simply NOT in the budget.
I was considering adding the XPS between the slants as I originally propsed….Then down the road in the next year or two remove the interior drywall in the slant portion add 2x2’s to the face of the studs (which will allow for more depth to add another layer of XPS in the slants) and then add a final layer of XPS horizontally across the face of the studs like this.
http://www.hammerzone.com/archives/energy/insulation/ceiling_sloped/rigid_foam.htm
This would get me apprx another 3.5’’ to 4’’ of XPS on the inside.
Would this be acceptable? This would be around 7’’ to 7.5’’ of XPS total…Is there a limit to how much XPS you can add from a perm perspective?
是的，当我写“气候9”时，我站在头上。
“除了缺乏R值之外，用XP的斜率之间的绝缘会导致任何问题吗？”
屋顶护套的潜在腐烂，通过将水分捕获到现在无法干燥到内部的未通风屋顶中。一分钱明智和愚蠢。第一次做正确的事情，您最终会节省资金。
I really feel some alternative exists vs. simply leaving my inferior balsam wool insulation intact or trying to detail the roof by adding XPS on top of existing sheathing and then re-sheathing over that. That alternative is what I came in search of here
罗伯特（Robert）您对通风的评论是公平的。我认为您的基础是假设倾斜区域将完全充满绝缘，因此索菲特区域和山脊之间不会发生任何沟通，但不知道您没有指定。
One alternative I was considering was if I have 3.5'' of space in the slant area why not only fill the slant portion with say 3.25 of XPS . This would leave a .25 gap for ventilation. I would run but the ventilation chutes from the sofit up to the slant area
Then when budget permits remove sheet rock, add 2x2’s to bottom of studs for depth additional layer sheet of XPS in the slant bays with a final layer sheets of XPS horizontally.
这种方式我通风sofit脊。I upgrade the insulation in the slant cavities over the current inferior balsam wool. Thus when budget allows can get up to necessary R value by adding insulation from the interior.
我知道这有些非常规。但这将为我当前的情况提供2个公然的改进
提高倾斜区域的R值
倾斜区域的缝隙将允许从索菲特通风到山脊
Thoughts?
多发性硬化症，
你必须有至少1”差距已经足够的屋顶ntilation. However, any gap is better than no gap in terms of drying potential of the sheathing.
But, unless you have some other reason to pull off the roof decking in order to access the slant ceilings, then it's a waste of time, effort and money. The balsam wool is no worse and probably better insulation than fiberglass batts. There is no good reason to remove it until you're ready to do the job right.
但是，如果您现在没有良好的拱腹和山脊通风口，那么重新屋顶是将其切入的时候了。
但是，可能有理由去除屋顶护套。除非您处于没有降雪的第6区的某个未知部分，否则2x4 afters不足，卸下屋顶甲板将允许姐妹姐妹尺寸合适的afters。这将产生连续排气通道和体面绝缘所需的屋顶腔深度。但是，在这种情况下，我建议浓缩纤维素。