Thanks for the further ideas, and for following up – much appreciated!
I must admit that after two very frustrating days looking for a
replacement, and after some sense of relief (from here, thank you!)
that there were possibilities besides buying a new fridge, I moved the
oven onto the dining room table (better insulated this time, of
course), placed the melted section on top of the fridge (not properly,
just as somewhere to put it) and haven’t been back to it since. I
really need to get onto it.
Tai Fu true about the plastic. I had foil in between, which is no
insulation obviously, but I thought it would reflect infrared away,
and as the oven is quite raised up on plastic feet, I thought it would
be sufficient, as it has been at previous apartments. But there was
even a mark “Max 60C” on the fridge, and as a physics teacher I really
should have known better. I’ll PM you.
One potential problem with the steel idea (maybe) is that directly
under it is polystyrene, which has browned slightly but is ok, but if
heat were to be placed on it it would certainly melt, probably
destroying the fridge. And a steel top would look like it’s
heat-resistant. Perhaps I could tell the landlord that it can’t hold
heat, but that begs the question of what the point of the steel is. I
also wonder about building in an insulation mat on top of the steel
sheet, if that idea can work.
I’ll update back here when I eventually get it sorted. Thanks again everyone!