**Exhibit 21**

**Subsidiaries of Headwaters Incorporated**

*Subsidiaries are 100% owned (either directly or indirectly) except where noted otherwise. 

**American Lignite Energy,LLC**, a Delaware limited liability company (40% ownership) 

**Atlantic Shutter Systems, Inc.**, a South Carolinacorporation 

**Blue Flint Ethanol LLC**, a Delaware limited liability company (51% ownership) 

**Chihuahua Stone LLC**, a Utah limited liability company 

**Covol Engineered Fuels, LC**, a Utah limited liability company 

**CovolFuels No. 2, LLC**, a Utah limited liability company 

**Covol Fuels No. 3, LLC**, a Utah limited liabilitycompany 

**Covol Fuels No. 4, LLC**, a Utah limited liability company 

**Covol Fuels No. 5, LLC**, a Utah limited liability company 

**Dutch Quality Stone, Inc.**, an Ohio corporation 

**Eldorado G-Acquisition Co.**, a Utah corporation 

**Eldorado SC-AcquisitionCo**., a Utah corporation 

**Eldorado Stone Acquisition Co**., LLC, a Utah limited liability company 

**Eldorado Stone Funding Co., LLC**, a Utah limited liability company 

**Eldorado Stone LLC**, a Delaware limited liability company 

**Eldorado Stone Operations LLC**, a Utah limited liability company 

**Eldorado Stone Philippines, Inc.**, a Philippines corporation (99% ownership) 

**Environmental TechnologiesGroup, LLC**, a Utah limited liability company 

**Evonik Headwaters LLP**, a United Kingdom limited liability partnership(50% ownership) 

**Evonik Headwaters Korea Co., Ltd.**, a South Korean corporation (50% ownership) 

**FlexCrete Building Systems, LC**, a Utah limited liability company (90% ownership) 

**Global Climate Reserve Corporation**, a Utah corporation 

**HCM Stone, LLC**, a Utah limited liability company 

**HCM Utah, LLC**, aUtah limited liability company 

**HES Ethanol Holdings, LLC**, a Utah limited liability company 

**Headwaters CTL, LLC**, a Utah limited liability company 

**Headwaters Clean Carbon Services LLC**, a Utah limited liability company (50.1% ownership) 

**Headwaters Construction Materials, LLC**, a Texas limited liability company 

**Headwaters Construction Materials, Inc.**, a Utah corporation 

**Headwaters Energy Services Corp.**, a Utahcorporation 

**Headwaters Ethanol Operators, LLC**, a Utah limited liability company 

**Headwaters Heavy Oil, LLC**, a Utah limited liability company 

**Headwaters Heavy Oil Canada, ULC**, a Nova Scotia, Canada unlimited liability corporation 

**Headwaters Refinery Investments Co**., a Utah corporation 

**Headwaters Resources, Inc.**, a Utah corporation 

**Headwaters ResourcesLimited**, a New Brunswick, Canada corporation 

**Headwaters Services Corporation**, a Utah corporation 

**Headwaters Synfuel Investments**, LLC, a Utah limited liability company 

**Headwaters Technology Innovation Group, Inc.**, a Utah corporation 

**Inspire Services, LLC**, a Michigan limited liability company 

**L-B Stone LLC**, a Utah limited liability company 

**Metamora Products Corporation**, a Michigan corporation 

**Metamora ProductsCorporation of Elkland**, a Pennsylvania corporation 

**MTP, Inc.**, an Ohio corporation 

**Piedras Headwaters, S. de RL de CV**, a Mexican limited liability variable stock company 

**Stonecraft Manufacturing, LLC**, an Ohio limited liability company 

**Stonecraft Sales, LLC**, a Michigan limited liability company 

**Tapco Europe Limited**, a United Kingdom corporation 

**Tapco International Corporation**, a Michigan corporation