I am building a stitch and glue dinghy and the plans call for 4" or 6"
glass tape for the inside and outside seams. The inside is specified to
be taped with 2 layers of this tape offset by a couple of inches giving
a 6" or 8" total tape width. The whole underside and most of the inside
is also sheathed with glass cloth as well.

The instructions do indicate that the boat is very very strong and is
possibly over engineered.

I have a big roll of 2" tape and am interested to know if using two
staggered layers of 2" tape giving a total 3" width would be considered
sufficient by those who have experience in these things. I still intend
to sheath the whole thing with 3 oz cloth as well as the tape.

Any input gratefully received.

Brian