“[The Natural Resources Defense Council] agrees… that the beneficial use of encapsulated fly ash in products, such as bricks, is sound and is a major source of the reduction of greenhouse gas emissions that should be encouraged.”

Fly ash facts

Fly ash overview

An introduction to fly ash, providing detail on where it comes from, its safety, ways it’s been beneficially reused for years, and pending legislation to encourage reuse. Includes technical detail on fly ash types and constituents.

The Natural Resources Defense Council on fly ash
As noted by the NRDC above, fly ash encapsulation is a key part of the emissions solution.

The US Environmental Protection Agency on the beneficial reuse of fly ash
The EPA voices their support for continued beneficial use of fly ash in building products such as CalStar’s bricks and pavers.

The U.S. Green Building Council on the beneficial reuse of fly ash in building materials
The USGBC states their support for the reuse of fly ash and its continued contribution to LEED credits.

Independent third-party analysis of product environmental safety
Our process for making fly ash into bricks and pavers binds the materials within a strong matrix that holds even if exposed to the acids that can be found in landfills.. Test results on our products from nationally accredited third-party laboratories have been reviewed and analyzed by Gradient, a respected environmental consultancy in Cambridge, Massachusetts. They find that “the presence of coal fly ash metals in newly manufactured CalStar bricks is not expected to result in any exposures of health concern.”