|
Barry,
I went through exactly the same thought process.
Yes, it can get hot in summer... but that's when to open the roof!
Never had any significant issues with condensation, even in UK winters.
The additional support frame is no more than basically a few lengths of 2" x 2" and one sheet of 6mm ply cut into strips to make the side and end seals.
The "trick", if there is one, is to find a suitable shed with a slightly gabled roof which can be removed leaving only the walls.
I'm sure Paul can supply more detail.
For the overall investment a few hundred $$$ - I think around $350 all up the TSO has given ten years of satisfactory performance, and hopefully has another ten ahead of it.
Edit: from the photo you can see the simplicity of the inner frame....
|