That should work fine as the back for it. No rain can get in there right? My nest boxes are on my half wall, the bottom is solid and the top 1/4 inch HWC and I have a large awning and have never had any issues with rain coming in.I am gonna put it against a wall, 1/2 solid (top) and the bottom wire (1/4 hardware, 1x2 Welded wire then chicken wire).