2021-10-13 17:48:58 UTC
Yes, it's this again. It does not need to be superinsulated, nor
continually heated, just enough so that being in it sometimes when it's
winter is reasonable.
It's going to get a rather thin layer of floor insulation - 25mm - under
ply, finished with laminate flooring.
The walls are thin concrete slabs, fitted between slotted posts. The
posts are thicker than the slabs between, so there's 25mm of "alcove"
between posts. The posts will have 2x2 vertically against them, leaving
another ~45mm of space to fill with insulation, finished with plasterboard.
Above the plasterboard ceiling, there will be some sort of insulation.
The four doors are another thing; steel frames (square hollow section,
40mm I think), with flat sheets of galvanised attached. They will need
some insulation too. Perhaps fit insulation in and board it over with ply.
This all needs to be cheap; best "bang for buck".
So, I ws thinking of laying 25mm EPS floor insulation sheets, fitting
further 25mm floor insulation between the posts (as it's non-absorbent
re water), inside/over the concrete wall slabs, then having 50mm of
rockwool sanswiched between the EPS and plasterboard. Above the ceiling,
I could lay ordinary glass fibe or rockwool loft insulation, perhaps
150mm thick. The doors could have 50mm rockwool or similar I suppose.
Any comments on effectiveness, or any cheaper useful insulation, please?