https://community.graphisoft.com/t5/Modeling/Wood-Sheathing-amp-Intersection-Properties/m-p/132109#M70417 Changing the Insulation Intersection Property (IP) to 651 Fixes this situation, but I am afraid that it may create different IP conflicts down the road.<BR /> <BR /> Here is a few of the IP that I have changed (on the right) from the default AC17 residential (on the left). Tue, 04 Feb 2014 18:47:01 GMT Anonymous 2014-02-04T18:47:01Z https://community.graphisoft.com/t5/Modeling/Wood-Sheathing-amp-Intersection-Properties/m-p/132108#M70416 <DIV class="actalk-migrated-content"><T>I have altered a few of the Default AC17 Intersection Properties for some of the Building Materials (BM) and have also added a few new materials like Wood Joist, Wood Rim. I am curious what others are doing?<BR /> <BR /> attached is a section with (2) floor and wall intersections. The wall contains a BM called "Wood Sheathing" that I believe is a default BM (I also created a Wood OSB). The upper wall and floor intersection is good, but the lower wall is not. What is any advice in this situation?</T></DIV><BR /><span class="lia-inline-image-display-wrapper" image-alt="Intersection Properties.png" style="width: 762px;"><img src="https://community.graphisoft.com/t5/image/serverpage/image-id/15625i6D750CEE45448F49/image-size/large?v=v2&amp;px=999" role="button" title="Intersection Properties.png" alt="Intersection Properties.png" /></span> Wed, 24 May 2023 07:04:21 GMT https://community.graphisoft.com/t5/Modeling/Wood-Sheathing-amp-Intersection-Properties/m-p/132108#M70416 Anonymous 2023-05-24T07:04:21Z https://community.graphisoft.com/t5/Modeling/Wood-Sheathing-amp-Intersection-Properties/m-p/132109#M70417 Changing the Insulation Intersection Property (IP) to 651 Fixes this situation, but I am afraid that it may create different IP conflicts down the road.<BR /> <BR /> Here is a few of the IP that I have changed (on the right) from the default AC17 residential (on the left). Tue, 04 Feb 2014 18:47:01 GMT https://community.graphisoft.com/t5/Modeling/Wood-Sheathing-amp-Intersection-Properties/m-p/132109#M70417 Anonymous 2014-02-04T18:47:01Z