What we going to cover in this article is to create a simple 270mm brick cavity wall and also a simple internal 110 mm wall. The critical part is to make sure the cavities close and also that the two wall types connect correctly as per the screenshot of the plan below.

South African cavity- and internal wall types in Revit 01

Creating the 270mm cavity wall.

The first step is to create the 270mm cavity walls consisting of two Brick Layers of 110mm each and an Air layer of 50mm wide. Note the Brick Layers we assign the Substrate (2) function to. Two things that you need to do is to firstly make sure the two Brick layers are outside of the Core Boundary so that Wrapping is enabled. In the screenshot below the core boundary is indicated by the grey layers at row 2 and 4. Also make sure you have set the Default Wrapping settings as indicated. This will enable the wall to wrap once a component is inserted into the wall. Also note the cavities wrap at the ends.

Here is the screenshot of the 270mm wall.

South African cavity- and internal wall types in Revit 02

Creating the 110mm internal wall.

Once the 270mm wall has been created you can Edit and Duplicate the wall. Name it 110mm for instance and delete two of the three layers as below. Now to make the 110mm wall connect seamlessly with the 270mm cavity wall you need to do the following: Click inside the cell of the Function column as shown and delete the text out of the cell. Click the Preview button twice. The Preview button is located at the bottom of the dialogue box. Then click OK.

South African cavity- and internal wall types in Revit 03

Now go to a plan view and draw the connection and you’ll have a seamless connection.

PS: You can repeat the same process with a 220mm or 230mm internal wall types as you did with the 110mm wall type.