Solid-core doors say quality. Whenever we consult on a design project, we recommend an investment in solid-core interior doors: there's something about the solidity and heft that just says quality.
Typical solid-core doors are built over a chipboard core that is often bound by formaldehyde adhesive. Now, there's an alternative: Humacore Wheatcore Doors.
Even better? They're made out of wheat!
OK, Humacore Doors are not 100% wheat. They are made by layering wood veneer over wheatboard cores. But wheatboard, which is made by binding wheat chaff together with adhesive, is a near-ideal material for a door; it's dimensionally stable and highly resistant to moisture, while also being lighter in weight than traditional wood composites like MDF or chipboard.
Bonus: wheat chaff is considered industrial waste from the mass production of grain. It is typically burned.
• This blog has more on wheatboard. Note that Dow no longer manufactures wheatboard in sheets: the company now making the doors bought the factory from Dow.
• The greenest solid core door? A salvaged one. Here's how to find one.
• The door we spied at Portland's Environmental Building Supplies (soon to be ecohaus) was finished with OSMO Polyx Oil... read about that and other natural finishes here.