Maybe you could increase contrast a little in photoshop.
One thing though - you have the sky in this shot and the sky is too bright for the rest of the shot - it's blown out.
You *could* use a filter on your camera to tone the sky down or you *could* take multiple shots at different exposures and blend them together later.
But - a much easier way to avoid this is to recompose the shot - so, maybe looking down more and more the camera around so you get more of the old greenhouse and bricks in the shot (after all, the are the interesting part, as well as the roller).
Shots like this are almost guaranteed to blow out in the sky so my advice is - take the sky out of shot - that way it doesn't become an issue
It's a nice shot though and has interesting textures.
Also - blown out parts of a shot don't really matter as long as they don't mean the rest of the shot is too dark. If your camera tries to average out between the sky and the foreground, the foreground will end up too dark.
But - don;t worry about the odd hot spot in your photos.
another idea would be to retake the shot in the early morning or late afternoon...you get a much warmer light then and the sky is not that high up in the 'Kelvins' ...yup, nice shot
Agree with John's idea of a tighter crop!