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Can Tyvec drain wrap be used over Zip taped system?

green654 | Posted in General Questions on

It’s a little too late for changes as the house is finished….. but I am wondering if it’s going to cause problems if the house has:
1.Hardy cladding
2. Tyvec drain wrap over
3. Taped Huber zip
4. 2 x 6 studs
5. mineral wool insulation
6. CertainTeed Membraine
7. drywall
8. latex paint 

house is in Chicago which is zone 5. And if it’s a problem, anything we can do to fix it at this point? Hoping the consensus is that is a-ok. 

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Replies

  1. Steve Knapp CZ 3A Georgia | | #1

    It's not a problem. Some on this site refer to this approach as a "belt and suspenders" strategy.

  2. Jamie B | | #2

    There's nothing 'wrong' with it. But I believe you'd get a more durable system if you used ½" or ¾" furring strips instead of drainwrap.

    My thought process being that affixing the cladding directly on top of the drain wrap, yes would allow water to drain, but wouldn't give much drying potential. You've spent good money on zip and Hardie, to prolong their performance and life, I suggest letting them dry faster with an air gap, via furring strips and vented at the top and bottom.

    Just my thoughts,

    Jamie

    1. Expert Member
      Akos | | #3

      +1

      Less cost, similar or maybe a bit more of labour and you have a more robust wall at the end of the day.

    2. green654 | | #4

      Unfornately, the house is already built. The Hardie is already up so it’s too late to add furring strips. Think it will be ok the way it is?

      1. Expert Member
        Malcolm Taylor | | #5

        green654,

        If the houses in your area do fine with standard house-wrap, yours will perform at well or better. Jamie and Akos were just pointing out it's a bit of a lost opportunity.

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