We're remodeling and the old flooring (lino and carpeting) has been taken
up to install hardwood. I noticed many of the 4'x 8' x 3/16" underlayment
plywood has lines of stitching. Yes, stitching, which goes through to both
sides, and is made of nylon or cotton multi-strand thread.
What is this? I've never seen it before.
In the fingerjoint flooring and in boat building - most definitely.
In boat building, the whole boat gets stitched together before any
gluing/resin application .
The stitching holds everything in position for gluing AND it
re-enforces the glue joint.
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