泄漏的壁板
Hi, We live in NW Montana and our house has cathedral ceilings. In the winter, water will leak out of the siding on the side and the top of the front door only and form icicles. There is no rain or snow on the roof so I am assuming it is condensation? How can this be remedied?
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答复
Is the water leaking out only in those areas where there are catherdral ceilings? I'm assuming these are VENTED cathedral ceilings (ridge and soffit vents)? I'm also assuming the water runs out ONLY on the EXTERIOR, you aren't having any issues with things like wet ceilings in the winter or other water issues inside the home?
Chances are you have the usual ice damming going on here. What happens is that heat leaks through the roof, sometimes from air leaks, sometimes just from insufficient insulation, and melts the lowest layer of snow that is directly against the roof. This water runs down the roof, then re-freezes when it runs out onto the colder eaves. Depending on where exactly this happens, the water can run off the edge of the roof and form icicles, or it can get inside the roof and run out from soffit vents, or down inside of exterior walls or siding. Water running into the exterior walls can be a big problem.
您通常需要处理的最基本的事情是至少两个宽度的冰和水上盾牌在屋顶的屋檐附近。冰和水上护罩的目的是在木瓦下形成一个防水层，以防止水在屋顶边缘附近的冰坝后面后退，然后可以在木ex带下木瓦并泄漏到屋顶组件中。一些承包商只安装了一个宽度的冰和水上盾，这实际上还不够，尤其是在更北部的气候区域或非常浅的俯仰屋顶中。
To stop the snow melt in the first place, you usually need some combination or more insulation, better air sealing, and sometimes better ventilation of the roof/attic.
如果您在根本没有积雪的情况下看到问题，那么您可能会在屋顶组件内遇到冷凝问题。这可能是来自房屋内部的空气泄漏。这个问题的经典原因是catherdal天花板上的嵌入式罐头，众所周知，这是空气泄漏的。您可以获得会有所帮助的LED改造，但这可能不足以完全解决问题。
My guess since you mention it's only above that door is that there may be an issue with ventilation in that part of the roof assembly. Vented roofs have much less issue with condensation than non-vented roofs since the ventilation carries most of the mositure away before it can condense and cause problems.
您能提供更多细节以帮助您在特定情况下缩小事物的范围吗？也许是一些照片或图纸？
Bill
Bill,
去年夏天，我们刚刚更换了门廊上的带状疱疹，然后进入屋顶。这样做时，我们将新的雪和冰放在山谷和屋檐上。显然，这无济于事。我的丈夫进入屋檐，看看发生了什么事，屋顶板上有玻璃纤维棒。他删除了一件被认为没有足够的空气流动的作品。我们整个房子都是大教堂的天花板。我们确实在前门旁边的泥室里有灯光。这是水用完的唯一地方。我附上了一些照片。感谢您的回复。
Was the fiberglass your husband removed wet, and did he see any signs of water or mold in the area he removed it from? Does the water run out when it rains, or does the rain not make any difference?
如果您看到这种水在没有下雨时耗尽，并且屋顶上没有雪，那么唯一剩下的就是屋顶组件内的凝结。这应该是只有在寒冷的天气下才会发生的事情。我会怀疑那些可以照亮潮湿的内部空气（如果您正在运行加湿器）到天花板上的潮湿的潮湿的内部空气（尤其是一个问题），在那里它在屋顶护套的底部凝结并最终从屋顶上延伸。
You may have some other plugged vents, but what you'll likely need to do is try to seal up those can lights so that they don't leak air. The easiest way to do this is with some of the better sealed LED retrofits with either a perimeter gasket or some rope caulk to seal the LED retrofit to the DRYWALL (not the recessed light housing). Many of the LED retrofits out there give nice light, are dimmable, and last a lot longer than a typical light bulk so they have other benefits besides improved air sealing.
Check that the ridge vent above that area is not clogged. I can't quite see what kind you have from your pics, but some tend to get squished after a while (you don't want the kind that look like foam that gets shingled over, for example).
Your overall solution is likely to be better air sealing and making sure none of the ventilation openings or channels are blocked. Roof ventilation helps to carry away any moist air that leaks up into the roof assembly before it can cause problems.
我还考虑让某人带着孔口看着那个屋顶，看看您是否需要担心任何腐烂或霉菌。
Bill
Bill, it is definitely condensation as it's only cold weather and regardless of rain or snow. The can lights make the most sense to me. There are four in that room and that's right next to where it's weeping.
Thank you so much for your insight!