WEATHERPROOF - Vent holes are cut at an upward angle to keep rainwater out. Door and floor are recessed by 3/4" to keep the nest dry. Dado joints keep this birdhouse dry and less drafty. WELL-BUILT - Made from 3/4" thick cedar wood. A stainless-steel guard protects the entry hole from squirrels and woodpeckers. A 1" thick wooden guard thwarts predators like cats and raccoons. Holes in the floor allow for waste drainage. EASY TO INSTALL - With a bottom hinged door to allow for easy cleanout. This is a great nest box for creating a trail of multiple bird houses to attract different species. BIRDS LOVE IT - Inspired by the very successful Gilwood and XBOX birdhouses. This nesting box has a floor size of 4.25" x 3.5" (15 square inch), and a 1.5" entry hole that is suitable for Eastern Bluebirds and many other species. TRUSTED QUALITY - Designed by a family of bird watchers. No corners were cut or cheap materials were used in making this bird house. We stand by the quality of this bird box and we are confident that it will last longer than other bird houses for outside!