vfem
Garden Addicted
What I see happening is the 2 3/4" boards eventually warping and not being so tight together. I would have used a wood caulk and glue AFTER screwing them together. You would get them to last longer. In fact go out and get a water resist caulk, and caulk inbetween the 2 pieces you have screwed together. It will give it a water resistant barrier and help hold them together longer. Just think you may have to touch up the caulk where it cracks each year, just like in your bathroom or around your windows.
I do not think one board alone that thin will work well. Good luck!
and
sclanimals, I have not done a stone raised bed, I've done brick and I do a LOT of weeding in between the weeds. However, if you want to cut back on weeding I'll suggest mortaring the joints of the stone/rock. I recently bought some mortar for a small project, and they come in tubes now like caulk to use in a caulk gun. They have them at lowe's or home depot in their lumber area... I found them with the decking supplies. Its good for just some spot mortaring where you have large gaps.
I do not think one board alone that thin will work well. Good luck!
and
sclanimals, I have not done a stone raised bed, I've done brick and I do a LOT of weeding in between the weeds. However, if you want to cut back on weeding I'll suggest mortaring the joints of the stone/rock. I recently bought some mortar for a small project, and they come in tubes now like caulk to use in a caulk gun. They have them at lowe's or home depot in their lumber area... I found them with the decking supplies. Its good for just some spot mortaring where you have large gaps.