I posted a photo a while back about the new roofing tile on our earthbag roundhouse. The exterior looks great, and the roofing tile won’t take any maintenance for 20-30 years. But like I said in that blog post the ceiling is unfinished. The thatch roof that was on it before made a gorgeous ceiling, but the upkeep was too much since thatch here only lasts about three years. It occurred to me that bamboo would look really good on the ceiling. One option is golden or yellow bamboo as shown in these images.