Boards covering the top plate to air seal in attic – Top plate is not accessible
Many of my top plates are completely covered by other boards. I.e. Some of the top plates have 2 2×4 boards butted together on top of it (Effectively making a 2×8 with a split in the middle.) While this ‘covers’ the gaps I do not believe it creates an air seal.
Should I assume it will be sufficient to seal around and between these boards?
– It would increase the length of my sealing by ~ 50% since I would be doing two sides and a middle. (Not counting the ends which are negligible). However would be much easier than prying them up.
– Maybe I should assume these boards are actually helping me somewhat by covering defects. * I have have moderate gaps to seal while air sealing so far.
- 如果建议，我可以撬开电路板并直接密封顶板。
Picture 1: Intersection of two top plates. 1 top plate looks ‘normal’ and I have sealed it (Please excuse mess, I was not planning a photo shoot.) The other top plate is covered by 2 2x4s butted against each other. (These ARE covering a top plate. The wall only goes in one direction.)
Picture 2: Exterior Wall. Interior edge of Top plate is covered by single boards running diameter of wall. Picture shows a rare gap where wiring is installed (Picture is of non-insulated portion above garage, but insulated areas have this same board.)
-This is the ‘roomy’ side of the attic with no rafters. I’ll be inspecting the rafters later but 1 thing at a time.
FYI这所房子建于2007年。看起来他们在我的邻居中快速推出它们。第6区，具有R13-R19绝缘（最佳）。至少空气密封将更容易到达。
答复
查尔斯，
它看起来像顶板上的额外2x4s被用作干墙的背衬钉/拧入。如果你试图撬开他们，你会猜出一些问题。
I personally would not worry about sealing these as they do not penetrate into the living area and really only create more of a thermal bridge. I would however be sealing all of the wire holes etc. that actually penetrate the envelope.
Thanks for the timely response. If this is the case, my work load will be reduced greatly since many of the top plates are covered this way.
I'll certainly be spending some time pondering this. I'm trying to wrap my mind around lumber essentially acting as a substitute for caulking / spraying the top plate. I would think air could still bypass the lumber through any places the lumber doesn't butt perfectly with both the drywall and top plate. - Then again I'm sure the majority of air leakage is occurring through holes drilled for wires and pipes. (But if not a lot of air is leaking along the top plate why do we seal it to begin with?)
我想我的思想是为了密封任何远程可疑的东西，同时我的绝缘较少处理。填缝委员会不会伤害任何东西。所以如果它给了我一刻来的话，我仍然可以去那条路线。
- Certainly will not be prying on any boards.
Photo: only 1 'extra' board on this top plate. One side of top plate covered. Other side of top plate open (and will be sealed). - This photo helps me visualize what's going on under the boards in the other photo. (Can't see the second top plate under the two boards photo since they are covering it.)
查尔斯，
与迈克不同，我会“在这些板之间密封”，即使“它会增加密封的长度〜50％，因为我会做两侧和中间。”
There are too many uncertainties about what is under those 2x4s, and you aren't going to be prying them up. A little extra time and material spent air sealing is time and money well spent. This is your only chance to get it right.
马丁，
I've attached a picture of what it looks like he's describing.
For my benefit, If it doesn't enter the envelope, why would it need to be sealed? Is this just in case these are not drywall backing? The top plates should have been caulked and or glued together, and possibly even caulked in the gaps. How would any thing leak through these into the home? I can only see air getting between the top plate and backing.
Seal it, there is still opportunity for air leakage behind/ontop the drywall and around the blocking.
麦克风，
你的蓝色箭头指向钉子。
我们密封顶板和安装在分隔壁上的干墙之间的间隙，因为空气可以在墙壁上的干墙和顶板之间泄漏。
裂缝上方的钉子不是气密的，因此钉子不能防止空气（其在相对于阁楼的正压下）进入阁楼。我们需要密封木头接缝以及干墙到木材接缝。
再次感谢所有的回复。很棒的图片，这可能是我的情况。迈克在理论上就是正确的。
However the issue here is assuming other people did things correctly.
基于到目前为止所遇到的一切，我必须假设一切都是错误的。（除了他们在油漆里面做的填缝之外）除了家庭或阁楼的任何地方都没有填缝。我的HVAC系统的空气摄入量通过带有螺柱和干墙的螺柱腔作为管道，直到它到达天花板。如果我没有找到一个1/2“间隙，这可能不会那么糟糕，管道在阁楼里附着在阁楼里，这让能够从阁楼吸引空气。 - 我知道房屋拥有相同的房屋比我的海峡电炉更低的电纸币比我在高效的热泵中大。不应该发生的情况。
这些入门家庭被视为一次性，没有人想将任何努力或金钱放入其中，因为“无论如何他们计划在几年内移动。”我不知道我住了多久，但我至少可以知道我做了我的部分，在我可以的范围内。
- 谢谢，我在很多网站上享受了我的阅读，特别是这一点。我还有一个方法。
图片：通过我的阁楼跑的主要摄入量。我可以到达管道内部。（现在在这里放置泡沫和2x4）
我在很快成为新家的阁楼里度过了一天。我发泡电箱，凹陷灯和电线渗透。现在我正在泡制薄片和顶板或钉子走到一起的每个地方。我在高清销售时有一个喷雾泡沫枪。如果你没有一个人，他们就是每一分钱。