topic Re: Converting Slab (Decke) to Roof in Archicad Without Losing Properties in Modeling

Converting Slab (Decke) to Roof in Archicad Without Losing Properties

ananas — Fri, 27 Jun 2025 13:04:00 GMT

Is it possible to replace a slab with a roof element in Archicad to create a sloped surface, while keeping all associated data, such as labels, solid element operations (SEOs), classifications, and any linked properties?
I need to model a sloped slab, so I’m considering switching to a roof element, but I’d like to avoid losing any information already linked to the slab.

Re: Converting Slab (Decke) to Roof in Archicad Without Losing Properties

Eduardo Rolon — Fri, 27 Jun 2025 14:17:42 GMT

No.

Workaround is to create the roof and relink dims, labels etc before deleting the slab.

You can try using try using "transfer settings" for Classifications and Properties but it might just be easier to do it manually.

Re: Converting Slab (Decke) to Roof in Archicad Without Losing Properties

Laszlo Nagy — Fri, 27 Jun 2025 20:05:46 GMT

You could also try modeling a Roof the bottom of which would be at the desired top surface of the Slab, and use the Roof as an SEO Operator to subtract the top of the Slab. That way, you will have a Slab that has a sloped top surface, and you still have all that associated data.

Re: Converting Slab (Decke) to Roof in Archicad Without Losing Properties

Funfun Yan — Sun, 29 Jun 2025 06:08:55 GMT

so tricky a trick! but why so many years GS not develope a function when the user tick a function called "slope floor", then the slab can input slope value.

Re: Converting Slab (Decke) to Roof in Archicad Without Losing Properties

Laszlo Nagy — Sun, 29 Jun 2025 09:05:52 GMT

That is always a good question the GS Product Team is facing constantly: which tool/function/feature to implement.

There is actually a wish about Flat Roofs:

https://community.graphisoft.com/t5/Wishlist/Improved-flat-roof-drawing-mesh-with-composite-structure-and/idi-p/660508

And there is another one about unifying the Slab and Roof tools:

https://community.graphisoft.com/t5/Wishlist/Unify-and-improve-the-Slab-and-Roof-Tools/idi-p/660720

You can vote for either of them to show your support.

Re: Converting Slab (Decke) to Roof in Archicad Without Losing Properties

Funfun Yan — Sun, 06 Jul 2025 05:59:41 GMT

The wish is close, I can'nt vote anymore. I think the vote is closed.

Re: Converting Slab (Decke) to Roof in Archicad Without Losing Properties

Laszlo Nagy — Mon, 07 Jul 2025 19:05:31 GMT

The two above wishes are still open, but you have to have SSA/Forward or a Subscription associated with your profile to be able to vote:

"Customers with Forward subscriptions/SSA/service contracts can enter new wishes or show their support for existing ones by voting on them!"

https://community.graphisoft.com/t5/Our-Community/Wishlist-guidelines/ta-p/631148

Re: Converting Slab (Decke) to Roof in Archicad Without Losing Properties

Funfun Yan — Mon, 07 Jul 2025 07:09:36 GMT

OK then. Unfortunately, my licence ended in June. I am looking forward to see the improvements in this function.

Re: Converting Slab (Decke) to Roof in Archicad Without Losing Properties

Barry Kelly — Mon, 07 Jul 2025 07:37:36 GMT

I doubt this will ever happen in a hotfix for the current version.

It means a revamp of the slab tool (or a completely new tool), so I am guessing it would only be in a future version for which you will then need to re-new your licence to see it.

Barry.

Re: Converting Slab (Decke) to Roof in Archicad Without Losing Properties

Funfun Yan — Wed, 09 Jul 2025 08:09:11 GMT

I doubt too. Given the current attitude of GS, rewriting a fundamental feature like the floor slab is basically impossible.