This post technically spans a couple of days but just a minor technicality ..
Some great photos of the framing to get an idea of size. The floorplan looks quite roomy however the height is a bit low - only so much you can really do without a massive change in the structure after all.
The view from the front with the massive steel I-Beam in place to hold up the roof rafters. This is bedded into the brick work against the party wall and follows the existing roof line at the front with a combination of the original joists and extensions towards the gable side. On the other side 50 x 150 mm (2x6 inch) roof joists to hold the dormer with a some wedges to get the right slope. The insulation is placed on top of this.
I have no idea how they managed to lift this thing up there .. other videos show some wooden platforms or pulley systems (see here). I didn't see either happening in our loft so I imagine it must either have been 1) magic and/or 2) a pack of stealth, ninja weightlifters. Either way, it's up there now an looks pretty solid.
And the front steel beam across the front to support the floor joists. Given that the joists can't extend right to the front load bearing wall due to the slope of the rafters, this intermediary beam is needed to take the weight.
A video from a similar install to show how it's done (here). This was a 3 part beam vs our one piece so I can only wonder how they managed to move this in our house. My guess is ninja weightlifters.
The photo below shows the new 2x6 floor joists sitting above the old 2x4 ceiling joists. There is a gap to ensure any flex (if even possible) of the 2x6's won't translate into cracked plaster ceilings. The insulation was kept in between to 1) save our heating bills - as it's &#@&^ cold at the moment and 2) noise dampening from the kids down below - we'll be thankful for that I'm sure.
And here is the joists for the bathroom. Great to see the size of everything to get a feel for the space. We're busy trying to figure out bathroom layouts and sanitary-ware - but that feels like the subject of another blog post. Stay tuned.
Finally, the bedroom/bathroom wall framed in. To the right will be the doors to the Juliet balcony which should let plenty of light through.