Am confident this will over-winter well. We live in the Pacific Northwest and frequently have freezing nights, winter weather, and snow storms. Boxes smaller than these have done very well for us, but the flickers (woodpeckers) were able to reach in and consume some of the larvae.. These are deeper, thicker, and more robust. We hung them in April and all of the tubes are full. We're looking forward to spring!
You can’t. It’s a design flaw once you read about mason bees. I had no idea until after the season.
It has a small key hole type hole in the back. I just used a flat head wood screw. I hung it on a wood siding wall at the seam line.
This is my second year. I did protect the wood w/ polyurethane initially (excluding the tubes). No bees that first year. This time, I painted all but the tubes with red paint to (hopefully) attract the bees. Anyhoo, I'm thinking this bee house should last multiple years if the wood is protected in some way.