We're going to build a 12' x 16' separate guest room in our back yard. It will have 2x6" frame construction, a simple peaked roof, and insulated double-pane windows. It will be used mostly when family comes to visit for two weeks in the summer and at Christmas and other shorter holidays. What's the least expensive type of heating and cooling unit that will keep them comfortable with our hot summers and wet winters?
The asphalt shingle roof of my Redding, California home is flowering with mold. What causes this? Is it dangerous? What can I do about it?