Walls are translucent ?!

My walls and furniture seem to be translucent, can anyone please help to make them solid again, I don’t know how this happened?
Thank you

Could you share the SKP file so we can see what’s happening?

Here is a link to my 3D warehouse where I have uploaded my model

Thank you

I can’t seem to post the link of my 3D warehouse, would you know how to do so?

You got it. To get to the model you have to click the 3D Warehouse logo at the bottom right.

The problem with your model is you have Back Edges turned on. Hit K and they should toggle off or go to View>Edges Styles and deselect Back Edges.

Thank you so much for your help! Must of accidentally clicked “K”!

Probably that’s how it happened. Glad to help.