Hi All,
Today was a warm, sunny, windy day here, and each board shrank an additional 1/16" today.
I took a carefully measurement of the width of one of the cut offs that I doped the ends with water base spar. Today it was 5&17/32nds" wide today. I am hoping to measure it every few days.
I got all of the decking boards for the first section screwed down. Hopefully they will now mind their manners. We will see.
Stew
With pressure treated deck boards, Butt the sides as tight together as possible. When dried, perfectly even 1/4” gaps.