PVC as an alternative to aluminum is as durable, infact some would say moreso. It has better insulative properties, and withstands temperature changes better, it has a great thermal rating and is used extensively throughout Europe, and now here for insulative windows and doors. They are quick to manufacture making them cost effective and quick to install, over time I have seen the sheen fade, but is restored once washed. Aluminum can do all of these things too, but unless they go through a powder coated process, their durability and finish is not as long lasting. However they have better colour options. PVC is white, and although is paintable, it is not a primed surface, so if it's white you want, then great, but if you have a tendency to change colour, I would stick with aluminum or timber. Stregthof PVC varies from thickness, it is a polymer and is formed with application tolerances in mind, meaning the strength required from balustrades or fencing sections are easily achieved in it's manufacture by the process it goes through. Connectors and jointing systems keep componentry flexible and sturdy. they have been used as our storm water conduits cor some time, and withstand constant submersion to water, and bearing weight. I would say that makes them durable and long lasting. I would be confident in this balustrade and by appearances, looks just as good.

Hi Leah. As you like timber what about using a decorative timber screen to fit that space? Enough decoration to give privacy, but open enough so light can come through. Kind of like a picture that draws your eye rather than an ugly square of glass. I'm sure houzz has an article showing these decorative screens in various styles. I have some typical geometrical chinese wooden windows in mind, but I'm sure you could find some laser cut specialist to do your design in metal, or a carpenter to do it in wood.

Great looking house. I'd paint the brick work all the same colour makes it look more grander. Keep the balcony same as the other part looks like it should be there then. Steps either need painting or cleaning. Is the driveway bricks clean too?

I’ve pondered on this one and while it’s hard to tell without pics and knowing the room size, layout and light I’d consider something like these but to the ceiling.