> For the complete documentation index, see [llms.txt](https://docs.dietrichs.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.dietrichs.com/dietrichs-intelligent-documentation/docs-de-en/design-program/modellbereiche/dach/dachflachenausfuhrung/durchdringungen.md).

# Penetrations

{% embed url="<https://youtu.be/bPrZLEBKCtA>" %}

**Exterior walls run from bottom to level**: The walls are automatically trimmed with the roof surfaces as soon as they contact a roof surface. Here you can specify up to which level the exterior walls should run. Anything that protrudes above the bottom edge of the level set here will be cut off.

**Interior walls run from bottom to level**: Interior walls are also automatically trimmed with the roof skin. A separate setting can be made for interior walls, since they often need to be trimmed differently than exterior walls.

**Dormer walls run from top to level**: Dormer walls are also automatically trimmed with the roof skin. In contrast to exterior and interior walls, they are cut from above onto the roof surface.

**Normal ceilings run to level**: For ceilings you can set a ceiling type 'intermediate ceiling' or 'boundary ceiling'. This specifies up to which level of the roof surface the intermediate ceilings should run. See also the section 'Trimming of ceiling and roof levels'.

**Boundary ceilings run to level**: For ceilings you can set a ceiling type 'intermediate ceiling' or 'boundary ceiling'. This specifies up to which level of the roof surface the boundary ceilings should run. See also the section 'Trimming of ceiling and roof levels'.

**Kink level for surface areas**: Here the level is defined from which the separation of surface areas (eaves area -- developed area) should continue at a right angle. See also chapter 'Eaves areas'.

### Interruption of levels by walls

With this setting you can control the penetration of roof levels with wall levels in more detail:

**Roof levels**: In this field you specify the roof level for which you want to make a more detailed setting.

**Wall type**: The setting applies to a specific wall type that you select here. This allows you to control whether the setting should apply to all exterior walls, only to the eave walls, or possibly only to the verge walls. The same options exist for interior walls.

**Level, offset**: Using two level numbers you can define the wall area within which the roof levels should be cut out. With the offset, this area can also be shifted so that a roof level ends inside a wall level.


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.dietrichs.com/dietrichs-intelligent-documentation/docs-de-en/design-program/modellbereiche/dach/dachflachenausfuhrung/durchdringungen.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.