# Adjusted CO2-threshold for constructions with special conditions according to BR18 **URL:** \ **Category:** Help\ **Created:** [January 23, 2025, 12:47pm UTC](https://community.realtimelca.com/t/adjusted-co2-threshold-for-constructions-with-special-conditions-according-to-br18/237 "2025-01-23T12:47:24Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![MarkLabrosse](https://dub1.discourse-cdn.com/flex005/user_avatar/community.realtimelca.com/marklabrosse/32/206_2.png) [@MarkLabrosse](https://community.realtimelca.com/u/MarkLabrosse)\ **Post date:** [January 23, 2025, 12:47pm UTC](https://community.realtimelca.com/t/adjusted-co2-threshold-for-constructions-with-special-conditions-according-to-br18/237/1 "2025-01-23T12:47:24Z")
Hi community In the danish LCA method in BR18, it is allowed to exceed the national CO2-threshold, if your building has special conditions, such as bad geotechnical properties of the ground, high level of safety (CC3 or higher), etc. ![image](https://europe1.discourse-cdn.com/flex005/uploads/realtimelca/original/1X/89d8107567c32fbbc36595587a134c59f79e55c4.png) The conditions are explained here [https://www.bygningsreglementet.dk/Bilag/B2/Bilag\_2/Tabel\_9#f00f6d89-6367-439e-baff-981c21725ab7](https://www.bygningsreglementet.dk/Bilag/B2/Bilag_2/Tabel_9#f00f6d89-6367-439e-baff-981c21725ab7) or here [https://www.bygningsreglementet.dk/tekniske-bestemmelser/11/brv/version-2-bygningers-klimapaavirkning/kap-2\_4/](https://www.bygningsreglementet.dk/tekniske-bestemmelser/11/brv/version-2-bygningers-klimapaavirkning/kap-2_4/) Is it possible to adjust the CO2-threshold in RTLCA after correcting for materials/constructions effected by special conditions? ---
**Author:** ![martinromby](https://dub1.discourse-cdn.com/flex005/user_avatar/community.realtimelca.com/martinromby/32/22_2.png) [@martinromby](https://community.realtimelca.com/u/martinromby)\ **Post date:** [January 24, 2025, 3:38pm UTC](https://community.realtimelca.com/t/adjusted-co2-threshold-for-constructions-with-special-conditions-according-to-br18/237/2 "2025-01-24T15:38:38Z")
Hi @MarkLabrosse We don’t have a specific feature developed for this, but you can use the custom calculationtype and adjust the threshold as needed. Br Martin ---
**Author:** ![MarkLabrosse](https://dub1.discourse-cdn.com/flex005/user_avatar/community.realtimelca.com/marklabrosse/32/206_2.png) [@MarkLabrosse](https://community.realtimelca.com/u/MarkLabrosse)\ **Post date:** [January 27, 2025, 10:43am UTC](https://community.realtimelca.com/t/adjusted-co2-threshold-for-constructions-with-special-conditions-according-to-br18/237/3 "2025-01-27T10:43:01Z")
I guess we could make a custom excel-spreadsheet that does this manually for now, but doing it manually would be rather time consuming and would make the `Emissions Overview` graph in the `Insights`-view obsolete. I would say that adding this feature is a fairly high priority to make RTLCA compliant with BR18 🤔 Don’t know, if I’m the only one that feels so 😅 ---
**Author:** ![ThomasM](https://avatars.discourse-cdn.com/v4/letter/t/50afbb/32.png) [@ThomasM](https://community.realtimelca.com/u/ThomasM)\ **Post date:** [May 1, 2025, 11:52am UTC](https://community.realtimelca.com/t/adjusted-co2-threshold-for-constructions-with-special-conditions-according-to-br18/237/4 "2025-05-01T11:52:35Z")
I really hope this will be implemented. Whenever we have special conditions, we have to do the calculations in LCAbyg instead. Thomas ---
**Author:** ![MarkLabrosse](https://dub1.discourse-cdn.com/flex005/user_avatar/community.realtimelca.com/marklabrosse/32/206_2.png) [@MarkLabrosse](https://community.realtimelca.com/u/MarkLabrosse)\ **Post date:** [May 1, 2025, 1:30pm UTC](https://community.realtimelca.com/t/adjusted-co2-threshold-for-constructions-with-special-conditions-according-to-br18/237/5 "2025-05-01T13:30:17Z")
Hi Thomas I’m not allowed to share excel files on the forum, so I have added my custom tool for calculating the compensation on my git. I added a little tutorial. > **[GitHub - labrossemp/RealTime-LCA](https://github.com/labrossemp/RealTime-LCA)** > > Contribute to labrossemp/RealTime-LCA development by creating an account on GitHub. It takes a few minutes, but it’s better than using LCAbyg 😜 But yes, I also hope that they prioritize this feature! ---
**Author:** ![ThomasM](https://avatars.discourse-cdn.com/v4/letter/t/50afbb/32.png) [@ThomasM](https://community.realtimelca.com/u/ThomasM)\ **Post date:** [May 2, 2025, 5:26am UTC](https://community.realtimelca.com/t/adjusted-co2-threshold-for-constructions-with-special-conditions-according-to-br18/237/6 "2025-05-02T05:26:44Z")
Hi Mark Thanks a lot. Appreciate it. Definitely better than using LCAbyg 😉 ---
**Author:** ![martinromby](https://dub1.discourse-cdn.com/flex005/user_avatar/community.realtimelca.com/martinromby/32/22_2.png) [@martinromby](https://community.realtimelca.com/u/martinromby)\ **Post date:** [May 13, 2025, 7:51pm UTC](https://community.realtimelca.com/t/adjusted-co2-threshold-for-constructions-with-special-conditions-according-to-br18/237/7 "2025-05-13T19:51:16Z")
> [@MarkLabrosse](#): > > But yes, I also hope that they prioritize this feature! Thanks a lot for that contribution Mark! I’ve added that to our Særlige forhold ticket. Should make it easier for the devs to develop. Br Martin ---
**Author:** ![MarkLabrosse](https://dub1.discourse-cdn.com/flex005/user_avatar/community.realtimelca.com/marklabrosse/32/206_2.png) [@MarkLabrosse](https://community.realtimelca.com/u/MarkLabrosse)\ **Post date:** [May 20, 2025, 1:26pm UTC](https://community.realtimelca.com/t/adjusted-co2-threshold-for-constructions-with-special-conditions-according-to-br18/237/8 "2025-05-20T13:26:13Z")
Hi everyone Someone reported an error in the excel file. I’ve fixed the error and re-uploadet the file: > **[GitHub - labrossemp/BR18-special-conditions-in-RealTimeLCA](https://github.com/labrossemp/BR18-special-conditions-in-RealTimeLCA/tree/main)** > > main Also gave it a little face lift Happy LCA-ing to you all 😉