I'm in a room with a fist sized hole in the wall, that when I looked inside of it discovered there's another wall behind it. what's the point?
I couldn't find an explaination on google.
Most Helpful Guy
Yeah.. I do civil engineering.. That's just called a cavity wall. As you know, air is a good insulator but usually there is a 'filling' between the two walls for better insulation but in your cases there isn't so I guess that's just an empty cavity.. So the purpose of that is for better retention of heat.4
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