This was a kit. All 4 corners are anchored into concrete. I didn't expect it to hold up as well as it has. I followed the directions exactly, the key to holding the panels in is the clear caulking. It glues the panels to the aluminum frame.
My heat source is 3 small electric heaters. They are place at different heights, ground level, knee height and waste height. All three heaters are on different circuit in case a breaker trips. That has only happened once.
