Better Building Materials Are an Underwriting Strategy, Not Just a Climate One

Josh Dorfman moved to China in 1995, a year out of university, to teach English in Nanjing. He ended up working in a bicycle lock factory for an American company, watching a country transition in real time from a billion people on bicycles to a billion people who wanted cars. That was the moment climate and sustainability became his actual career question: how do you keep letting people live well without that appetite colliding with the planet’s limits.

Everything since has orbited that question. A SiriusXM radio show called The Lazy Environmentalist, built around the idea that sustainable choices have to be easy and desirable, not a sacrifice people are guilted into. A stint running a center called The Collider, using historical climate data to build risk models for and with the insurance industry. And eventually, in 2021, co-founding Plantd with two engineers who’d each spent nearly a decade at SpaceX — one of whom led the life-support systems team keeping astronauts alive aboard the Dragon spacecraft.

Plantd’s premise is straightforward once you hear it: grow a biomass that outgrows trees ten to one, and use it to make better building materials than wood. In Episode 146 — the first InsurTechTalk episode of 2026 — Josh and I covered why one of the largest property insurers in America chose to invest in a construction materials startup, why supply chain control is becoming a bigger competitive edge than price, and why resilient building materials might matter more to the future of homeowners insurance than any pricing model.

About Josh Dorfman

Josh Dorfman is the co-founder and CMO of Plantd, a materials science company that grows a fast-growing biomass and manufactures it into engineered structural panels for home construction — walls, roof decking, and flooring — as a lower-carbon, more moisture- and fire-resistant alternative to traditional wood composite panels. Founded in 2021, Plantd has raised roughly $19.5 million across seed, Series A, and strategic rounds, plus a $22 million Series B shortly before this conversation, with American Family Ventures — the investing arm of American Family Insurance — leading the Series A. Plantd has signed a contract to deliver 100 million panels to D.R. Horton, the largest homebuilder in the United States. Josh also previously ran The Collider, an insurance-focused climate data and analytics center, hosted the SiriusXM show The Lazy Environmentalist, and founded Super Cool, a media company covering the real-world rollout of the clean energy economy.

Grass That Outgrows Trees Ten to One

Plantd’s core innovation starts with agriculture, not manufacturing.

• The company grows a biomass that matures roughly ten times faster than trees and is harvested annually rather than on a decades-long timeline
• Because it pulls carbon from the atmosphere as it grows, an acre of it yields roughly nine to ten times more usable biomass than an acre of forest
• Unlike trees, which grow where trees grow, this biomass can be cultivated much closer to population centers — directly shortening the supply chain between raw material and construction site
• In North Carolina, Plantd’s growing operations are giving tobacco farmers — an industry in structural decline — a new, economically viable crop to plant on land they were at risk of losing productive use of

Why the Panels Solve a Real Construction Problem

The manufacturing process is where Plantd’s SpaceX engineering background actually shows up, and it targets a specific, well-known failure point in American home construction.

• Most pressed-wood building panels are made from wood chips bonded with adhesive, which leaves inconsistent gaps where air and moisture can penetrate
• Plantd’s biomass fiber is far more consistent, so it can be sliced thin and pressed with a much smaller amount of adhesive — in the range of 3 to 5% — leaving little room for air or moisture to get in
• That matters because moisture intrusion, mold, and mildew are significant structural problems in home construction across much of the US
• The material’s fire resistance comes from the composition of the plant itself, not from added chemical treatments
• Josh’s blunt observation: the home building industry doesn’t buy materials because they’re better for the planet — Plantd competes on price, strength, and moisture resistance first, with the climate benefit as a secondary result rather than the pitch

Vertical Integration as a Supply Chain Hedge

For a builder operating at D.R. Horton’s scale, Plantd’s pitch isn’t primarily environmental — it’s supply chain certainty in a materials category that has become increasingly volatile.

• Plantd controls its supply chain end to end — growing the input material and manufacturing the finished panel — which lets it offer builders price visibility a year or two out
• Traditional wood-based materials are exposed to real geopolitical shocks: disrupted Baltic birch and plywood imports tied to the war in Eastern Europe, tariff changes affecting Canadian lumber, and Canadian wildfires affecting timber supply
• For builders operating at scale, locked-in inventory and pricing stability is a strategic advantage independent of any sustainability argument

Why an Insurance Company’s Venture Arm Led the Series A

The clearest signal of where this story intersects with insurance is who wrote the biggest early check.

• American Family Ventures, the investing arm of American Family Insurance, led Plantd’s Series A — a carrier that insures a large number of the roofs Plantd’s materials could eventually go under
• The strategic logic: materials that are stronger, more moisture-resistant, and hold up better against extreme weather translate directly into fewer and less costly claims over time
• Homeowners insurance markets in wildfire-exposed California and hurricane-exposed Florida have both seen carriers pull back or exit entirely — a dynamic that makes more resilient, more insurable construction materials directly relevant to whether coverage remains available at all in those markets
• The embedded carbon-capture story in how the biomass grows also has appeal to European reinsurers actively looking for ESG-aligned investments and underwriting exposure

Raising Capital for a Manufacturing Business

Plantd’s fundraising story includes one of the more memorable “how we got our first check” anecdotes in early-stage climate tech.

• An early investor connection came through a guest from Josh’s old radio show, who connected him to Biz Stone, the Twitter co-founder — Stone understood the pitch immediately, called it civilizational-scale change, and wrote an early check that made the rest of the round easier to close
• A number of former Facebook employees have also become climate tech investors and backed Plantd, which Josh only half-jokingly attributes to a desire to do some good after their time at the platform
• Total raised to date is roughly $19.5 million through seed, Series A, and strategic investment, plus a $22 million Series B closed in the months before this conversation
• As a capital-intensive manufacturing business, Plantd is now in a position to diversify its funding mix further, including a larger future role for debt financing alongside equity

Key Takeaways

• Plantd’s core pitch to builders is price, strength, and moisture resistance — not sustainability, which Josh is explicit the home building industry doesn’t buy on
• Vertical integration of the supply chain, from growing the input to manufacturing the panel, is a genuine hedge against the geopolitical and climate shocks now hitting traditional lumber pricing
• A major insurer’s venture arm leading the Series A is a concrete example of a carrier investing upstream in loss prevention rather than only pricing risk after the fact
• Wildfire and hurricane-driven insurance retrenchment in California and Florida creates a direct commercial incentive for more resilient building materials, independent of any climate motivation
• Reaching institutional investors sometimes still comes down to one well-placed relationship — a former radio guest’s connection to Biz Stone unlocked Plantd’s first meaningful round
• As Plantd scales into a genuine manufacturing business, its capital strategy is shifting from pure equity toward a mix that includes debt, typical of capital-intensive physical-product companies