Solid Tools not recognizing solid

My solid inspector says the model is clean, I have since exploded it and remade it into a component, and picked apart the whole model. Yet, I cannot understand why solidtools is not picking it up as a solid. I have attached the file. Notice how the site itself is solid, but the house is not.

Cheers, GMM
24.0722_SketchupCommunity_Help_SundownModel.skp (310.5 KB)

Sometimes Solid Inspector 2 will miss things. In this case it’s missing the following which Solid Inspector identified.

I fixed it by pulling the face above the roof skin in a little bit and erasing unneeded edges.

In reality that location wouldn’t work the way you had it modeled as there’d be no thickness there anyway.

Fixed version:
24.0722_SketchupCommunity_Help_SundownModel.skp (231.5 KB)

The older Solid Inspector extension does not like the edge marked in red in the image below (x-ray mode turned on). You can also see it plainly in the attached image with a section cut through it. Four faces share that edge, which is not allowed for a SketchUp solid and would not 3D print correctly because it requires an infinitely thin connection. This is probably a special case that Solid Inspector 2 does not handle correctly.

What an interesting case! Thanks for that!