Our birdhouses are built to last! They are pretty enough to use indoors, but hardy, and intended to be used outdoors. ALL models have removable walls for easy cleaning and seasonal maintenance. They have real shingled roofs that are either pine or red cedar, feature exterior grade ply-board for the walls and underlying roof, and feature kiln-dried hardwoods, pine, and poly-resin detailing. They are painted using water-based non-toxic exterior paints to make them long-lasting, and are left unpainted on the inside. There is ample ventilation and drainage guaranteed in all models. Unless otherwise noted, all birdhouses feature a 1.25″ opening that is suitable to accommodate common cavity dwellers such as Wrens, Finches, Titmice, Chickadees, and Nuthatches. Happy Birding!