Fast Flash and Zip Tape Together
SeanRyan
| Posted in General Questions on
I feel like I’ve seen videos of this before, but having a hard time tracking those down. Curious to find out how well Prosoco’s Fast Flash and Zip Tape work together in a rough opening flashing.
If they do stick to one another, do they have preference on which sticks to which? Ie. Could I use Prosoco’s liquid flash on the sill and up the corners and then transition to the more affordable and faster Zip Tape?
Thanks,
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I've been using zip liquid flash at the foundation to sheathing transition. If the liquid flash touches the tape, you should use a little acetone to clean the backing release off the tape.
I would not trust tape over liquid flash
Liquid over tape, never the other way around. That is the specific directions from Huber on using their tape and liquid products together. Definitely wipe the tape with acetone.
If your windows have nail fins, think about what you will use to flash over the nail fins, knowing that (if you mix tape on the sides and liquid for the sills) a single vertical fin will be covering two different products. That's another argument for doing the entire rough opening in a single material system. You don't want to use ZIP tape to flash over a fin in the liquid flashed sill area, for example (it's assumed that the nail fin likely isn't covering the rough opening flashing).
If you're taping the sides, why not use stretch tape for the sill, unless your sill has some fussy geometry that would work best with liquid?
Else use liquid on the entire rough opening, and flash over the nail fins with liquid?
Thanks Chris -- Good point about the nail fin. We ended up doing 80% of the windows with Zip stretch tape / regular tape and the others with the fast flash. Just because we wanted to make it complicated (but really because we had some we couldn't return any longer). So, we'll just have to flash over the window fins with more liquid flash on the few that have the Prosoco.
Chris, are you saying that you can't put zip tape over zip liquid flash? I'm not seeing that in the literature....It makes sense to wipe the tape with acetone before applying liquid flash over the tape, but I dont see the issue with tape over the liquid flash. I read over the website instructions and don't see that.
There's a Huber technical bulletin about that. Their official stance is that it's really not recommended, and that liquid over tape is the better of the two permutations. You can do whatever you want, but I generally wouldn't go against manufacturer recommendations that specifically call that out.
https://www.huberwood.com/technical-library/compatability-of-zip-system-tape-with-zip-system-liquid-flash
Thank you for pointing that out Chris.
Also -- for anyone with a similar question.... I asked the Prosoco team about what tapes would work to take a nailing flange that had an RO prepped with Fast Flash. They say the Protecto Wrap BT 20 or PS 45 Butyl would work.