New 2011 Design from Wildlife Allies. The Cedar Sloped Roof Chickadee House features our outdoor high-grade vinyl film graphics and photos. Made of 3/4" Cedar, with corrosion resistant hardware, the bird houses are made with the finest American Craftsmaship. These houses have great ventilation, drainage and proper dimensions. The Bluebird house has two pre-drilled holes for mounting on a post or fence. The floor of the house is 4" X 4" and will accomodate a mounting plate underneath. All design panels have grooved lines on the inside for the young to climb out of the nest. The entrance hole is 1 1/8" for Chickadees. You may change out this panel by simply using the bottom turn button and sliding out the panel.