This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Hallway insulation. Common building insulations inside an apartment building in Mississauga Ontario Canada Own Achim Hering Thermal insulation Construction materials Rockwool Buildings in Mississauga June in Canada in Mississauga Corridors
Page 2023 Free-images.com. All images are Public Domain