To see a short video of how the windows are being installed go here:

<span style="font-size: medium;"><a href="https://www.dropbox.com/sc/ske0gjxh3p9ldqa/OkXi_v0O4i">https://www.dropbox.com/sc/ske0gjxh3p9ldqa/OkXi_v0O4i</a></span>

Note the builders are not wearing hard hats, are riding on a pallet without guard rails or restraints. At the end of the video they bump into the newly laid tiles and crack one so at that point I stopped videoing and walked away.