砖砌内部侧面的闭孔泡沫？
I’ve attached a quick sketch (not to scale) of what I’m up against, but the basic gist is that I am faced with an exterior porch that was long ago converted to additional conditioned space. It looks like the side walls are fine (framed on the slab), but when they bumped out for a bay window, they muddled it up. It appears that the brick cladding on this porch was placed in contact with the interior framing/sheathing. The sheathing is all but dust at this point, and the framing is rotting from the footing up. Interior finish is T&G wood paneling.
It would be pretty tough to incorporate an air/drainage space between the framing and the brick when working from the inside out, and the exterior is all garden shrubs and trees, not ideal for excavating for weep holes.
我的第一个想法是拆除腐烂的墙壁并在混凝土上重新构造，我会倒入该墙壁，以填补下台的下部，以使其与其余的平板保持水平。然后，我认为也许像在地下室里有石粉底墙一样在地下室中涂上喷雾泡沫来阻止水穿过砖块？现在，我想知道这是否可以解决水分迁移问题，甚至可以解决这一问题，但只要注定砖块以保持水分并引起剥落问题。
基本上，我担心解决当前水问题的最佳方法（是的，沟槽和等级坡度将得到纠正），而不会引起另一个不同的问题。
I didn’t build it this way, just trying to fix it. Any thoughts?
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Replies
如果像似乎从你的插图,海湾window walls are below grade, then you need to bring that footing up to the level of the slab. Then you could install 1" of XPS against the inside face of the brick cladding and reframe the wall with 2x3 with no sheathing. The XPS will isolate the framing from the brick, limit thermal bridging and still allow some vapor permeance in both directions (unlike closed cell spray foam).
Justin,
How far below grade is the brick footer?
您能从内部看到框架底板吗？
Roy,
在这一点上，框架底板几乎是灰尘。此时，门廊的外部被深雪所包围，所以我无法进行准确的测量，但是即使在门廊地板上，我也可以猜测等级的水平。也许有点以下。看来，砖平底可能是门廊地板其余部分的顶部下方8到10英寸。
罗伯特 - 但是，在这种情况下，这两个方向都需要蒸汽渗透吗？担心水会被困在砖中吗？我之所以问，是因为我通常试图建造旨在仅在一个方向上干燥的墙壁（例如，在未绝缘空间中改造成品的地下室...墙壁上的泡沫是绝缘的，但可以使内部干燥）。
Justin,
This is a complicated situation, and I need to be sure I understand. You're saying that the exterior grade is equal with the porch floor. So how and why did the original builder install a framed wall that begins below grade? Are you sure that you are sketching this accurately?
If your understanding and my understanding are both correct, then it's clear that there shouldn't be any below-grade wall framing. So you'll have to figure out a way to support the porch roof, remove the wall framing, and pour concrete from the lower footing to the top of the slab, just as Robert advised.
只要您的砖墙不会获得非凡的水暴露，您就应该能够比Robert更多的泡沫安装更多的泡沫。如果您在内部安装3或4英寸的刚性泡沫，我认为您的墙壁会运行正常。
One other potential problem: most brick veneer walls are stabilized by brick ties that tie the veneer to the wall framing. If your wall framing is rotten, your brick wall may not be stable and may have to be demolished.
Martin,
雪被清除了，以便我可以确认周围级别的高度，但是正如罗伯特所建议的那样，计划绝对是用混凝土填充那个较低的空隙。我最关心的部分是泡沫的选择和应用。具体而言，应使用闭孔泡沫来密封水蒸气，或者是更可渗透的泡沫（例如XPS），因为它具有干燥的潜力，因此是更好的选择。我当时在砖块上描绘了闭孔泡沫（或polyiso刚性泡沫），以防止外来水，而被困在泡沫内部侧面的任何蒸气都可能干燥到内部。两面干燥的概念是否需要？
Justin,
If I understand the situation, ther are only a couple of feet of brick below a bay type window. The framing under the window is toast. Do yo see any movement related to the window? If not , the brick veneer may be carrying a bit of the load . Is this a 1 story bay or higher? If 1 story- no big deal, couple of feet of wall under a window being supported by a couple of feet of brick. I would simply brace, or transfer the load of the window in to the slab and remove the bad knee wall. Depending on the depth to the footer, pour it solid as noted in Robert and Martin's posts or you could lay CMU if the footer is deeper than you expect. Once the framing is above grade the foam detailing won't be so important. I would recommend wall ties of some sort if the brick under the window is more than a couple of feet above grade. They may already be there when you take the bad wall out.
Justin,
Here's a link to a relevant blog by Joe Lstiburek:旧砌体建筑物的绝缘改造。
These situations are complicated. I'm still worried about the fact that you have a brick veneer wall -- but that the brick ties aren't tied to anything anymore.
如果砖平底不在霜冻线以下，我会从窗户下方拿出整个墙壁，然后开始刮擦。如果树木和种植在路上，您可以从内部做整个事情。支撑单层凸窗的负载根本不难。