> 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.md).

# Roof Surface Construction

In the system, specifications for roof surfaces can be defined. When a roof surface is generated through roof layout calculation, different information is adopted from the specification. All these values are then stored in the roof surface. A subsequent change to the specification is not automatically applied to roof surfaces that have already been calculated.

After invoking the function 'Roof layout calculation -- Manage roof surface specifications', the dialog box for defining roof surface specifications opens.

Using the selection list at the top of the dialog box, existing settings can be selected. With the diskette icon you can save the current setting under the same name or under a new name. Via the management icon, new specifications can be created, including by adopting existing roof surface specifications, and existing specifications can be modified or deleted. See 'Save settings' in the 'General Help' manual for more information.

The following values can be configured for each specification.


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