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I have seen cases where the joist butyl tape is applied to overlap to the sides of the joists and over time pulls apart. I recommend to only use butyl tape where it is compressed by two surfaces. Similar to a gasket is used to seal any two parts by it being compressed via clamp or bolts.
@@dustinstorey6779 moisture will enter from where the screw tears hole in joist tape ... and once it gets underneath (especially in freezing conditions) it will have no easy where to go and will seep in the screw hole (and problem will compound as tape loses adhesive power over a few months)... to me its a stretegicaly created point of failure. If there was no tape then there's that much more surface to air contact that speeds up drying ... but either way screw hole is going to be a point of failure in long term.
