Sigh. Having sanded and varnished most of my downstairs floors
(suspended over a space too small to access), fitted new skirtings, a
hearth and a fireplace (which seemed like quite enough work at the
time), I'm now wishing that I'd really bitten the bullet, taken up the
floorboards and insulated underneath. Even if I'd demolished most of
the tongues in the process, I could have ripped them into straight-
edged boards.

I have one room to go, and might go the whole hog there (ironically
it's a spare room). But for the rest of the ground floor, the idea of
pulling off all the skirtings (how else to remove the T&G boards whose
ends go under them, and are fixed with brads an inch from the wall?),
and doing the floors again, is heartbreaking, though I might just bite
the bullet when I've completed all the other jobs. Or I'll content
myself with lots of rugs.

Which leaves the Holy Grail, discussed on here before - how to
insulate under a suspended timber floor, with no access from
underneath, without removing the floor.

Cheers
Richard