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Any updates on Huber Zip Wall R Sheathing?

Jim Orasky| Posted inEnergy Efficiency and Durabilityon

A while back I asked for opinions on my proposed insulation plan for a home I’m getting ready to build in PA – zone 6. The original plan was as follows:

(from inside to outside)
5/8 drywall
2×6 studs 24OC
cellulose sprayed in stud bay (R19)
OSB sheathing
housewrap
两层聚iso foamboard(交错& 1taped) (R12)
3/4 strapping
fiber cement siding
approx r value R31

I’m now considering the following

From inside to outside
5/8 drywall
2×6 studs 24OC
3.5″ Roxul batts (R15)
2 ” closed cell spray (R12)
Zip wall R6 sheathing (joints taped) (R6)
fiber cement siding
approx r value 33

So I have 2 questions –

Any udated info on the Zipwall R6 product ? (haven’t seen any comments since the Aug thread on this product)

What do you think of my “new” plan?

Thanks

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Replies

  1. GBA Editor
    Martin Holladay||#1

    Jim,
    My only comment: be sure you have a plan to brace your walls, because Zip System R Sheathing can't be used for bracing.

    我以为你读过他们的安装nstructions:
    ZIP System R-6 Sheathing Installation Manual.

  2. Jim Orasky||#2

    Thanks Martin - will keep that in mind. What do you think of the insulation plan?

  3. GBA Editor
    Martin Holladay||#3

    Jim,
    I think it will work. There may be some people who wonder if you couldn't get equivalent or better performance using less expensive (or less "foamy") materials -- but your wall assembly will work.

  4. Jim Orasky||#4

    Martin - I'm open to "less expensive/better performance", but like I mentioned in the posting last year with my original plan, the options out there are mind numbing and the choices cascade into many integrated design issues. Can you give me an example of what a less expensive/better performing option would be. Thanks!

  5. GBA Editor
    Martin Holladay||#5

    Jim,
    Costs vary widely, depending on local costs from insulation contractors, and the cost of framing labor. But in many areas of the country, the least expensive way to build a high-R wall is with two parallel 2x4 walls that create a 12-inch-thick cavity. Such a wall assembly is usually insulated with dense-packed cellulose.

  6. Aj Builder, Upstate NY Zone 6a||#6

    Martin is right on but also with proper bracing and the sprayfoam your home will be braced well, insulated well and very airtight at least the wall will be.

  7. Bob Irving||#7

    Keep the strapping! A rainscreen won't add to your R value but may prolong the life of your siding. Its also inexpensive to buy and to install.

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