Be sure built-ins are tall enough. Sloped ceilings can cause some height issues, so be sure you can access built-ins without bumping your head. “I advise applying the same the code height for doorways, which is 6 feet, 8 inches to 7 feet, when creating built-ins,” says Schold. “This assures safety when walking around and up to drawers, shelves, hanging clothes etc.”Don’t forget: Energy efficiency is important for attic spaces. The temperature of your space should be comfortable for you and for proper storage of various items. “Calling in the heat and air guys for their opinions, suggestions and bids should be done up front,” says Schold. “Energy-efficient ideas could alter other plans and be costly down the road if not done correctly off the bat.”