https://community.graphisoft.com/t5/Modeling/Why-does-zone-not-trim-to-multi-plane-roof/m-p/251575#M132787 <DIV class="actalk-migrated-content"><T>Works fine for single plane .... but <BR /> Why does zone not trim to multi-plane roof ?<BR /> <BR /> see screenshot</T></DIV><BR /><span class="lia-inline-image-display-wrapper" image-alt="Why_does_zone_not_trim.jpg" style="width: 999px;"><img src="https://community.graphisoft.com/t5/image/serverpage/image-id/11871iDC45FE3263350208/image-size/large?v=v2&amp;px=999" role="button" title="Why_does_zone_not_trim.jpg" alt="Why_does_zone_not_trim.jpg" /></span> Tue, 23 May 2023 12:27:30 GMT Michael 2023-05-23T12:27:30Z https://community.graphisoft.com/t5/Modeling/Why-does-zone-not-trim-to-multi-plane-roof/m-p/251575#M132787 <DIV class="actalk-migrated-content"><T>Works fine for single plane .... but <BR /> Why does zone not trim to multi-plane roof ?<BR /> <BR /> see screenshot</T></DIV><BR /><span class="lia-inline-image-display-wrapper" image-alt="Why_does_zone_not_trim.jpg" style="width: 999px;"><img src="https://community.graphisoft.com/t5/image/serverpage/image-id/11871iDC45FE3263350208/image-size/large?v=v2&amp;px=999" role="button" title="Why_does_zone_not_trim.jpg" alt="Why_does_zone_not_trim.jpg" /></span> Tue, 23 May 2023 12:27:30 GMT https://community.graphisoft.com/t5/Modeling/Why-does-zone-not-trim-to-multi-plane-roof/m-p/251575#M132787 Michael 2023-05-23T12:27:30Z https://community.graphisoft.com/t5/Modeling/Why-does-zone-not-trim-to-multi-plane-roof/m-p/251576#M132788 Strange, it trims just fine in my ArchiCAD 18 copy.<BR /> Maybe something is going on with the geometry of the Roof. You could try to recreate the Roof and try to trim again. Sun, 08 Mar 2015 16:05:20 GMT https://community.graphisoft.com/t5/Modeling/Why-does-zone-not-trim-to-multi-plane-roof/m-p/251576#M132788 Laszlo Nagy 2015-03-08T16:05:20Z