J JMKL #1 Member · 6 posts 1 Jun 2025 at 9:26 PM JMKL Member 6 posts 1 Jun 2025 at 9:26 PM #1 Hello! I was about to install fresh air vents but encountered a sheet of metal about 1mm thick behind the asbestos board, does anyone know what this is? It is above a window. Thanks in advance! #70s-house #metal
Hello! I was about to install fresh air vents but encountered a sheet of metal about 1mm thick behind the asbestos board, does anyone know what this is? It is above a window. Thanks in advance!