https://community.graphisoft.com/t5/Modeling/Trimming-Walls-to-Roof/m-p/243557#M129483 Thanks, I will change the priority of the walls, that was it!<BR /> Cheers<BR /> Naomi Mon, 14 Nov 2016 11:20:36 GMT ngoldie 2016-11-14T11:20:36Z https://community.graphisoft.com/t5/Modeling/Trimming-Walls-to-Roof/m-p/243555#M129481 <DIV class="actalk-migrated-content"><T>Hi,<BR /> <BR /> I'm having trouble with the trim elements to roof shell. Every time I do it the walls still show on outline on top of the roof which then shows up in plan.<BR /> See image attached. Is there anyway to trim it so it isn't showing the outline on top of the roof?</T></DIV> Tue, 23 May 2023 12:19:50 GMT https://community.graphisoft.com/t5/Modeling/Trimming-Walls-to-Roof/m-p/243555#M129481 ngoldie 2023-05-23T12:19:50Z https://community.graphisoft.com/t5/Modeling/Trimming-Walls-to-Roof/m-p/243556#M129482 You are using priority based connections, which means that those walls/collumns etc have a building material which has a higher priority than your roof currently has.<BR /> <BR /> Either fix this or use Solid Element Operations instead of Trim.<BR /> <BR /> Trimming is the more intelligent option where your walls and collumns would pass through the 'weaker' materials and stop at the 'stronger' core, provided you set this up correctly.<BR /> <BR /> Solid Element Operations as the name implies just defaults to the solid elements (walls, roofs etc all are solids) as a whole to substract, interfere, exclude etc etc Mon, 14 Nov 2016 10:47:57 GMT https://community.graphisoft.com/t5/Modeling/Trimming-Walls-to-Roof/m-p/243556#M129482 Erwin Edel 2016-11-14T10:47:57Z https://community.graphisoft.com/t5/Modeling/Trimming-Walls-to-Roof/m-p/243557#M129483 Thanks, I will change the priority of the walls, that was it!<BR /> Cheers<BR /> Naomi Mon, 14 Nov 2016 11:20:36 GMT https://community.graphisoft.com/t5/Modeling/Trimming-Walls-to-Roof/m-p/243557#M129483 ngoldie 2016-11-14T11:20:36Z