Flashing a Window Using ZIP Tape

It appears that Joe Lstiburek changed his view on nailing flange caulk in 2014. Prior to that time he recommeded its use to set in windows but in BSI 085 he says "Note that sealant is not necessary (or desirable) behind the window flanges" So you might think you are providing belt and suspenders when you "smush" the sealant for an additional air and water seal. I have never seen a scientist wear both a belt and suspenders.🙂 This time and material is unneeded and costly to the homeowner and the environment. It may be capturing any moisture that naturally occurs and varies in building products - especially wood.. It does not make sense that you use impermeable sealant behind the flanges but permeable tape above them. According to a well respected and seasoned builder Hammer and Hand who learned from mistakes that sounded good at the time of construction "we use a high-performance all-weather exterior flashing tape over the flanges. The tape need not be vapor-permeable, but it must stick well in damp, cold weather and effectively bridge flange to flashing." So the building science seems to vary a lot over time and needs to follow up to date current recommendations... Thanks for the video however.

What is the little white piece that I'm seeing in the top corner of the window at 5:28? They seem like a very quick and effective part of the flashing assembly. Does anyone know where they can be purchased?

When a nail fin window is installed, the "air barrier" at the jambs is INSIDE the house--an air barrier of interior air from interior air, but still a good detail. Seeing many methods of using Zip tape, this looks like the most expensive. Some only use stretch at the corners, regular seam tape for the rest, and many omit seam tape under the fins at the jambs and head--just using it over the fins.

I am very interested in construction videos and all the new technologies. One thing that I am always wondering about these type of glued on solution is how many years the glue will remain adhering. I understand the siding will by nature push the seal against the wall, still the seal is formed using multiple pieces, so I fear there will be transitions and other places where intact glue may be needed.

the zip system also sells this glue that comes in easy to drink juice boxes. just pop it and drink

Is that ok to use Big Stretch (acrylic latex caulk) over Zip tape?

Does it come in white

Used zip tape on plywood with temporary weather treatment and it didnt have a great bond. Certain spots the tape didn't stock. My expectations were let down some.

👍📐🔨

It's only a matter of time before this system falls to the wayside and we hear: "remember when we were told this was a good idea?" Based upon what we know about butyl tapes we're going to see rot behind this tape at every joint- not just around doors and windows. New building product technology is great but this is destined for disaster. It's popular because its applied to the sheathing so just tape joints which makes production faster but for the end user this is garbage. Just like 6mil plastic over insulation has proved to be.