Every birdhouse is built weather resistant and designed to be a comfy home for birds. Below are instructions for cleaning and mounting your birdhouse onto a steel pole, should you desire to do so.
Cleaning: Simply remove the screws that attach the roof (typically 4). If the roof consists of two panels, only one side panel needs to be removed. Clean out the inside and replace the roof panel.
Go to the plumbing section of a hardware store (pictures below are from a Home Depot). You need a threaded “Galvanized Floor Flange” (A), you can get either a 1/2” or a 3/4” depending on what size pipe you want. Then buy the threaded pipe (B) at whatever length you want (at least 1 foot of pipe needs to be underground). They will cut the pipe if necessary for no charge. Then pick up one container of Quikrete (C) red label, and a bag of pea gravel (D) in gardening section.