DURHAM – Plantd, a startup focused on what it calls “carbon-negative building materials,” has formally announced closing on $10 million in venture funding.

WRAL TechWire reported on the Series A fund raiser earlier this month.

The funding was led by American Family Ventures.

“We are thrilled to back this exceptional and visionary team,” said Kyle Beatty, managing director at American Family Ventures., in the announcement “Plantd is creating fundamentally better construction materials that are cost-effective and truly carbon negative. We have been impressed by how they have reinvented every step of the production process from first principles, all the way from input material to logistics.”

Co-founders include CEO Josh Dorfman and former SpaceX engineers Huade Tan and Nathan Silvernail.

The startup’s proprietary technology “transforms fast-growing perennial grass into durable, carbon-negative building materials that outperform competitive products on key attributes, including strength and moisture resistance.,” the company says.