Originally Posted by RST
Mine has 4 screw into the wall. We used large metal washers to keep the screws from biting into the foam. If it was a snug fit from floor to ceiling, you could probably just wedge it in there.
The problem with the velcro technique is the adhesives on velcro do break down over time, accelerated by heat. You might get a couple of years out of it in a cool climate, and if that's all you want, you're good to go.
RST
Command strips. Not sticky backed velcro. Two different things for different purposes. Command strips are meant to stick things to the wall.