Amherst, NH, US
Really on the Red Rosin? What did you save $.03/sq ft? If you didn't think you need a vapor retarder why use anything at all? I believe the NWFA calls out the none-use of rosin paper specifically because it wicks moisture. In other words, any moisture that does get through is just going to be held by the paper.
Also, agreed with Bobbydoggy on material choice. As well as the floor expanding could cause gapping, just as easily as it could from shrinking, by crushing the wood. very good.
I can understand how the extra $12-13 a window over a project with a lot of windows can add up, but I'm not sure I follow on the difficulty in the corners? Don't you mean outside corners and aren't you using it solely for the purpose of sealing the corner? Also in practice because you still bought the stretch tape, I think you're really only saving a few dollars a window. I went through this exercise with our window replacement project.
We've been replacing some windows in our house and using Zip stretch tape. If you score the release paper as described but also score where the 90 degree is, it makes corners much easier (Inside corner in my case).
I also don't see the three layers as a thickness problem but as an intrusion problem. Shouldn't we be minimizing intrusion points? In this case you have two rather than one. I know it's a lot of sealed/bonded tape for water to work through but just doesn't seem like what I would expect you all to be using in practice.
Why not just use the stretch tape rather than having three layers of tape in each corner? Cost?
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