墙上装配 - 验证或评论
在我出去之前，我希望在竞标之前完成计划，在密尔沃基和芝加哥之间的WI / IL边界（技术上气候区6，而不是结束它是5）的边框。
This will be a forever home, so we want it to last 500 years (keep it in the family) :). Was originally hoping for ICF but the cost was just not in the cards, so it will be stick frame. So looking for the longest-lasting wall assembly I can afford which led me to the perfect wall, a la the remote or persist wall style (from what I read doublestud may be cheaper -although not sure with where wood prices are today actually – but that remote is a sure thing if you get it right).
我们还希望能够高效，因此我们希望墙壁r为25或以上（减去窗口影响）。
My architect wants to put interior insulation in as well to keep us under 4″ of foam on the exterior. I am for some reason super-afraid of moisture issues, so was hoping to use a self-adhered rubberized membrane to cover the sheathing and keep all of the outdoor moisture outdoors. With interior insulation I have to be weary of indoor humidity then, and so I was looking at the SIGA Majrex as a way to keep indoor humidity out of the wall without creating a vapor barrier sandwich – plus I can use this as a ‘netting’ to blow in cellulose to the cavity. I’d then strap 2X horizontally to give me a 1.5″ service cavity for electrical, and not have to worry about puncturing what would essentially be a fully airtight frame.
总而言之，从外面的层将是：
-Vinyl Cladding
-RAINSCREEN（思考撕裂3/4“PL胶合板到3英寸的板条，但不会处理1x3，相反吗？）
-2“GPS（最大持续r的石墨eps）
-Another 2″ of GPS with seams overlapped (total 18-19 R)
-grace perm-a-blarier或henry blueskin
-7/16“OSB.
-2×6 Studs 24 o.c. advanced framing (dense packed with cellulose, total 19.8)
-majrex空气/蒸气屏障
-2x3或2×4水平捆扎
-1/2″ drywall
-Latex paint
What concerns me most is REMOTE says 2/3 of the R should be on the outside, but elsewhere it seems I could get by with 50/50 and I think this would technically meet code – I’m just hesitant that we’ll get colder winters over time or something where I end up regretting the extra R’s of the interior. Is this just overkill? Would it be more cost-effective to go 6″ of GPS on the exterior (only R27) and not worry about the interior insulation or air barrier?
我会喜欢任何和所有意见和见解。
- 谢谢，约翰
GBA Detail Library
由气候和房屋部件组织的一千个建筑细节的集合
答复
Unless you plan to keep constant high interior humidity during the winter, you would be better off omitting the Siga membrane to allow as much interior drying as possible from the primary air barrier/vapor control, especially with it being an essentially perfect one in a self-adhered membrane on OSB. The 2/3, 1/3 rule of thumb comes from Canada. You'll be in a better range for zone 6 with your proposed continuous insulation over 2x6 cellulose. Mid-wall air barriers like this are great because they almost always stay dry above the dew point whether you're heating or air-conditioning by being insulated inside and out.
I would opt for untreated 1x4 for the rainscreen. 1x3s like to split near the ends. Last thought: I can't say I've seen a vinyl cladding product made to last 500 years, nor one I'd want to look at for even 5 but that's personal preference. The biggest issue is it can't usually span unsupported between furring strips. Better to go with a wood or metal product up for the long haul.
谢谢你的输入杰森。
My wife has several fish tanks (which I am currently investigating on how to make airtight, or at least not humid somehow - seems like they should be able to dehumidify and put that heat back into the water, but until I get there they are basically evap humifiers), and requires we run a fan-powered humidifier in the kids rooms if they are sick, so controlling indoor humidity will be a challenge. I'm looking at leveraging a CERV for ventilation which seems keenly focused on humidity, and a standalone dehumifier in the basement, so that may do the trick but I was hoping to be safe vs sorry. I like your perspective though so I appreciate the comment.
我现在的乙烯基现在更便宜，所以我可以在5到10年内做出更好的事情（我只是希望贝壳去过最后500个），但我也会重新评估这一点。非常感激。
>我可以通过50/50来获得，我认为这将在技术上符合代码
This significantly exceeds code, even in zone 7. Which means that you could simplify the interior side with no Majrex and no strapping (just drywall and low side of Class III paint).
考虑胶合胶合板加排水瓶。如果外部水更加弹性，它会更加弹性。