This is to transform an outside courtyard with deck into a flexible usable greenhouse / wintergarten space which is beautiful and enjoyable all year round.
The deck has brick walls on three sides and looks on to a natural rock wall. The area is approx 7x5x8x7m as a quadrilateral (see plans).
It has a wooden decking floor.
Budget approx $10k
Castlemaine, Victoria, Australia is a fairly extreme climate: in summer temperatures are frequently up to 40 degrees C while in winter down below 0 degrees C (105-25 F).
The house is designed to warm naturally with the winter sun. I want to enhance the solar passive functionality of the house, and create an extra living space by enclosing the courtyard with transparent acrylic / glass / plastic so that the sun can heat up the space in winter. Probably need to enclose it down to the ground as the decking (which is approx 300mm above ground) is not a solid floor.
So it creates a beautiful greenhouse, livingroom and sauna area.
I want the space to be flexible in the sense that it can be easily opened up or closed depending on the weather conditions, perhaps with a combination of flexible PVC blinds which can be rolled up, or windows which can be slid open or closed.
Ideally I would like the whole setup or part of it to be packed away in summer to be a more open (i.e. open to the sky) area like it currently is.
So part of the design challenge is about beauty and part is about simplicity of construction and deconstruction. Part of it (over the existing sliding doors) could remain to protect the sauna from the elements and also to provide some shading on a part of the courtyard.
Design should be for the enclosing roof and also consider the placement of objects in the room (i.e. 4 person sauna, hammock, garden beds, maybe some beautiful rocks or another bench / comfy chairs to rest in).
Design needs to consider both winter and summer extremes.
So in summer it should be about a design that works in very hot temperatures with the sun directly overhead, so much of the glass structure could be packed down easily (i.e. say in a days work?) and the remaining roof would protect the sauna from the elements, and provide a bit of shade for the courtyard.
There should be a door of some kind to the grassy bit next to the deck.
Occasionally it hails in winter so the choice of materials would be important to not be damaged in hail storms.
I want to use materials that allow for a clear view of the outside sky and the lovely rock wall to the north. I am thinking something like 6-8mm acrylic which costs approx $100-120 / sqm.
The house is quite blocky and angular / yang so it would be great to have more yin / curvy / textural elements in the greenhouse.
An idea I had recently was to think about how to use a roll of clear PVC plastic over a series of beams at different heights which would give a curved appearance to the roof. Maybe the roll could be rolled away when not required?
I am also planning to paint or render the bricks with a textured stone paint.
Note goal of flexibility in previous section is important.
I would like the ceiling to be higher than the bricks to give an expansive feel to the room.
It needs to be practical to maintain (i.e. to clean the glass / plastic when required)