Like someone else who posted here recently, I have a bit of second floor
which slightly overhangs the rest of the building (essentially in front
of the front door, making a covered but open porch area). I have
seriously considered a boiling oil hatch, but think I might leave that
for another day.
Currently I just have the joists there. I need to insulate it, and
cover it up, so what I was planning to do was:
- Screw some kingspan to the underside of the joists, to ensure the
joists don't act as a cold bridge.
- Screw some ply under the kingspan to cover it.
- Add some additional insulation between the joists, above the kingspan.
In fact I have a bunch of plasterboard backed kingspan offcuts that I
might use here, so would attach it plasterboard side up (so plasterboard
side faces upwards).
Does this sound like a sensible approach?