寻求有关壁板和水分的建议…
最近，我注意到在寒冷的冬季天气中，我的胶合板护套的内部水分（进行了接线维修，让我进入内墙）。这可能不足为奇。我处于寒冷区域，标准壁结构约35年前；-sheetrock，3.5英寸的玻璃纤维，带牛皮纸或箔纸面对钉在螺柱上，胶合板护套，建筑纸/包裹（我认为Tyvek，我认为），然后在5英寸的曝光下呈雪松木瓦，染色。幸运的是，似乎并没有朝腐烂旋转，但这只是一个区域。
I’m now thinking of residing, in part due to moisture issue but also due to maintenance of keeping shingles stained at my age now and with a two story house. But now I’m stumped as to what would work and be an upgrade. I’d like to use rigid foam outside the sheathing (for moisture control and more R), but per Martin, none is better than not enough in a case like this. And “enough” is R-7.5, which translates to 1.5″ of xps, or more, since xps loses R value over time (eps might be better here but more depth is needed for R value). I was considering vinyl for it’s low maintenance. Installers usually use half inch of rigid foam below the vinyl, which in my case would seem to be a negative (not enough). If I were to consider more foam, what in the world does one do about the added depth for windows and doors? Some of my windows could be fairly replaced, but some are good vinyl windows only a few years old. No way I would want to discard those.
有人有类似的经验或有用的建议吗？
Thanks so much.
GBA Detail Library
由气候和房屋部分组织的一千个建筑细节的集合
答复
采访乙烯基壁板公司，让他们知道您想要的R值。雇用有经验的经验，因为您自己没有自己做工作。
In my area the installers do know how to retrofit vinyl with added insulation.
aj
霍华德，
任何具有一些闪烁体验的良好的修剪木匠都应该能够为窗户安装外部装饰。很难描述每个步骤，但是基本上您的窗户需要外部JAMB扩展（类似于内部JAMB扩展）。
You also need a sill extension for each window, and the sill extension must be watertight; most installers use metal flashing. It's important to try to get the interior edge of the new metal sill under the existing sill if possible, and to turn up the flashing on the ends so that the installation is watertight.
使用防水材料进行JAMB扩展 - 也许是细胞PVC装饰。
感谢Martin和AJ。您的回答很有帮助，也可以缓解。我以为整个窗户的事情都比这更重要（并不是说这不是很大的工作和费用）。我认为值得重复使用的窗户必须被删除并放回原处，以便与壁板合适地集成在一起。我认为这可以用乙烯基法兰的窗户比木框更容易完成，但绝不是一件容易的事。
顺便说一句，R因素呢？鉴于XPS失去R因子，我将需要什么？
问：“ r因素呢？考虑到XPS失去R因子，我需要深入什么？”
A. In your original question, you mentioned using R-7.5 foam. That matches the minimum R-value for exterior foam on a 2x4 wall in your climate zone, as recommended in my article (Calculating the Minimum Thickness of Rigid Foam Sheathing).
与Polyiso不同，XPS的热性能不会在低温下降解。实际上，在低温下，XPS的热性能略有改善。
The R-value of XPS falls with TIME not temp, as the blowing agents escape. At year 50 expect no more than about R4.3/inch @ 75F, making that R7.5 rated foam more like R6.5, barely more than EPS of the same density.
EPS is made of the same polymer, has a stable R over time and offers a higher drying rate toward the exterior.
On 2x4 construction in a zone 6 climate figure on 2" of type-II (1.5lbs density) EPS. At 2" it will run about 1.5 perms which is somewhat higher than the vapor permeance as 1" of XPS. At 2" it'll be R8.4, sufficient R to protect the sheathing from a dew-point considerations, yet sufficiently permeable that it won't matter for the sections of wall that may have foil faced (highly impermeable) batts, avoiding the moisture trap. It would also roughly double the thermal performance of the walls.
如果对于您的预算来说太昂贵了，只要水分的角度使用1份或更高（这意味着乙烯基或箔片脸，）从水分的角度来看，半英寸的底层方法可能会很好。
Number crunchers verses reality. I insulated a home exactly as being discussed here. Vinyl siding over 1.5" fanfold EPS. The savings in energy use is not as great as my next experiment in using open cell spray foam.
空气密封....必须做得很好，以降低能源成本。
AJ; at this early stage I was thinking 2" of EPS would be most appropriate. I had to look up the "fanfold". Interesting idea, -I couldn't tell if it came in 2". If I use xps I would likely also go with 2" to cover the loss of R value over time, wanting to wind up with 7.5 if possible.
I did other research regarding Martin's comments about windows, and found much good stuff, including Martin's own article on "innie" and "outie" window installation and retrofit when using foam or other thick walls. It sounds like no great advantage one over the other, -perhaps mostly appearance.
哦，AJ，是对改造的开放式细胞泡沫的想法吗？- 如何应用？在外部喷洒似乎是一个挑战，尤其是因为似乎需要平坦，均匀的表面，这在喷洒的泡沫中很难。
霍华德（Howard），要真正注意到能源使用的减少，除了在房屋中添加刚性泡沫外，还必须做更多的事情。使用搜索功能。