How do you merge walls in Sketchup?
Right-click on the selection and choose “Intersect.” From the options, choose “Intersect with Model.” Click off the object to deselect it. If you now triple-click on that area again, you will see that both of the objects you used are now selected, proving that they are now one merged object.
How do you convert to solid in SketchUp?
For SketchUp to realize something is a solid, you have to make it into either a group or a component first. Another thing: Solid groups and components can’t have other groups and/or components nested inside them. Making a solid doesn’t require any special tools.