> For the complete documentation index, see [llms.txt](https://docs.buildingtransparency.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.buildingtransparency.org/ec3/material-categories.md).

# Material categories

- [Processed Glass](https://docs.buildingtransparency.org/ec3/material-categories/processed-glass.md): This page provides additional descriptions on the different types of processed glass included in the EC3 database so that users can ensure they find EPDs that are appropriate for their needs.
- [Painting & Coating](https://docs.buildingtransparency.org/ec3/material-categories/painting-and-coating.md): This page provides additional descriptions of the paint category in the EC3 database to help users understand how EPD results are defined, reported, and compared.