> For the complete documentation index, see [llms.txt](https://docs.pollination.solutions/user-manual/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.pollination.solutions/user-manual/model-editor/workflows/exporting-the-exterior-envelope.md).

# Exporting the Exterior Envelope

Sometimes all you need is the building envelope. You can use the [Merge Rooms](/user-manual/model-editor/commands/alphabetically/me_merge_rooms.md) command with a high tolerance value to merge the rooms on the floor together quickly. This is also a necessary step for creating [core and perimeter models](/user-manual/model-editor/workflows/creating-core-and-perimeter-models.md).