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Hydro Ban as liquid flashing on Zip system sheathing

doughpat | Posted in Green Products and Materials on

Hi all –

I will be installing Zip+R (R-6) sheathing on a 2 story ADU (700 sq foot living + 700 garage).  A guy in my area is selling surplus Hydroban (by Laticrete) for a very good price.  Considering using it as liquid flashing instead of the Zip system tape or Zip liquid flashing.  Concerned it may be too thin — they seem to recommend it for gaps of up 1/8″.  I’m not sure how big the gaps are going to be between the ZipR panels.  

Seems like dang useful stuff to just have around for other applications though!

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  1. JC72 | | #1

    Look up the install requirements for Zip-R. I believe there are no gaps because foam layer is offset by 1/4 - 1/8 of an inch on one side of the panels and they interlock with recessed edge of another panel.

    Of course with your route you'd likely void any warranty on ZIP-R.

    1. doughpat | | #2

      Hi John - you know, that seems like a really basic consideration that I hadn't actually considered. I'm paying big $ for these panels and voiding the warranty to save 1% is probably a great example of tripping over a dollar to save a dime. I guess I'll stick with Huber stuff. Just need to find the best place to get the sausage tubes as the price seems to vary wildly.

      What is the most common use of Hydroban in new residential construction? The bargain hunter in me hates to pass up a deal on what seems to be a pretty awesome product. I do plan on tiling the shower walls, and floor, sounds like this would be a 'on-label' use of the stuff.

      1. JC72 | | #3

        I don't know anything about Hydroban. If you really want to use it then perhaps consider going OSB + Hydroban + Exterior rigid foam? You'd have to contact the manufacturer about that set up.

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