After looking around the basement, I took another look around the rest of the factory in more detail.
I found a large sign on one of the old office walls with the word 'Klinger' engraved on. It looked to be some sort of mural or an art piece with the companies logo printed on.
I also found the entrance to the roof. Some vital establishing shots could be captured from up here.
I finally come across a hedge trimmer lying in the middle of one of the rooms. We could use some props like in our trailer, e.g. weapons the mutated workers use...
I took another photo of the outside of the building but in different weather. The first visit was clear skies but I took this photo on a cloudy day. From this, we can get an idea of what the factory will look like in different lighting and weather. We can decide then in what weather we want to shoot the outside of the factory.