The Portland birdhouse is constructed from sustainable FSC wood. It is easy to clean by opening it from the small hook on the side. Only clean the birdhouse once a year after the young birds left the nest in september/october. Try to find a sheltered place facing north or east to prevent rain coming in to the birdhouse. Choose a quiet place out of reach from cats and other animals. Birds can use the birdhouse year round when there is not a lot of natural shelter around.