CompanyClimateHardware
CleanFiber
CleanFiber makes high-performance, carbon-negative cellulose building insulation from recycled corrugated cardboard. Using a proprietary wet separation and liquid borate infusion process, it produces a cleaner, lower-dust insulation that performs better than legacy newsprint-based cellulose. Based in Buffalo, New York, the company has scaled rapidly since opening commercial production in 2020 and was named the #1 fastest-growing manufacturing company in America on the 2024 Inc. 5000.
2013Founded
BuffaloHQ
$20M (U.S. Department of Energy)Grant
cellulose insulationrecycled cardboardcarbon-negativebuilding materialsdecarbonizationsustainable construction