Learn how to stain wood stairs in just a few easy steps. Staining wood stair treads is a simple DIY project, let me show you! Have I ever mentioned that we have a “back house?” It’s a completely separate home with a full kitchen, two bathrooms and a bedroom upstairs. We’ve had a friend living there who recently moved out. Needless to say the carpet that was on the stairs and bedroom floor had to go! We hired someone to lay the stairs but I decided I would stain the stair treads.