QuiltE

Mine is stapled to the back of homosote, then the boards screwed with washers to the wall.
That's the 10ftx7-1/2ft design wall.

I have an other that is corroplast .... 4'x8' sheets
Fleece is duct taped to the back. Then the sheets are screwed to wall.

I have smaller ones of homosote, 2'x4' ... same stapling to the back.
Works great, leaned up, right next to the sewing machine.

Likewise for smaller corroplasts. Lightweight, and can slide into oblivion behind/under furniture or wherever you want.

Then the single block design walls are perfect right at the machine.

I mentioned earlier that pins are not needed for my quilts on the design wall.
However, that being said, I do think it's important for the walls to be pinnable (when you can).
..... All of mine accept pins nicely, as I tend to pin patterns or other notes to the design walls.