Built-in furniture offers advantages over freestanding furniture by being less expensive and allowing for more creative interior design with unlimited space. Built-in furniture can be part of the interior architecture. Straw bale construction uses bales of straw as an insulative building material stacked like blocks. It provides economic and environmental benefits but has challenges with moisture and permitting. Structurally, it can be load-bearing or use a post and beam frame, and testing has shown straw bale walls outperform standard wood frame walls in terms of fire resistance and strength.