More low cost furniture ideas for your sustainably built home. The least expensive, high quality furniture is typically made from free salvaged/recycled materials like pallets and barnwood, and free natural materials such as branches, twisted wood, stumps and tree roots that most logging companies leave behind. Tree root furniture is strikingly beautiful because its twisted, rustic shape is 100% natural and unique. You could pay hundreds of dollars or even way more for this incredible furniture at a boutique store downtown. Or you could put on your hiking boots and head for the forest to gather your own tree roots for free. Either way, you’ll end up with a one of a kind piece that could last for centuries. And unlike that pressed board crap, this stuff is super strong and doesn’t offgas formaldehyde.