Flashing a Window Using ZIP Tape
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- čas přidán 17. 04. 2023
- Travis Brungardt and Joe Cook of Catalyst Construction walk through the step-by-step process of prepping, caulking, and flashing a window using stretch tape and flashing tape from ZIP System at Fine Homebuilding House Kansas.
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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.
Not true, in a traditional window install outside air can get in though the bottom of the window and from there can get into the house through the gaps between the sheathing and framing. Taping all the sheathing/framing seams prior to window install prevents this. The taping outside the window is just for water, not air.
Because the bottom fin does not get tape. I see. @@ryan52403
Is that ok to use Big Stretch (acrylic latex caulk) over Zip tape?
the zip system also sells this glue that comes in easy to drink juice boxes. just pop it and drink
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.
I figure by the time the adhesive has worn out the home itself will be decrepit and time to be torn down and rebuilt or its the fourth or fifth owners years and years down the line problem to get the windows removed and resealed. Also like you said, the window itself will help keep the tape in place to some extent. Just like cars, no one is thinking about the third or fourth owner outside of warranty, whatever breaks is their problem years down the line.
Valid point. You have to look at the track record and testing of the system. Zip is not totally new, and the testing is extensive. There have been systems that were popular in the past that turned out to be bad ideas years later, so beware..... Even time-tested methods have a failure rate. Building paper that everyone used early 20th century eventually deteriorates. Improper installation is probably the biggest issue in any system. If you want something that does not depend on tape adhesion, consider liquid flashing. If chemical adhesion is a worry altogether, I'd opt for well layered and flashed felt paper, and mineral wool insulation, the approach being that, in any case, the wall is able to dry out if there are leaks. Painting and maintenance is the other part of the longevity equation. Now everyone uses tape on windows --not just Zip users. This started before Zip. Not long ago we only used non-adhesive flashing and sealant.
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 designed for Zip sheathing. What is "temporary weather treatment"
It's a system that's used within itself. Most tape adhesives aren't going to stick to traditional materials that have been weather treated.
👍📐🔨
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.