mlv wrote:

Noise insulation and fire resistance are other reasons for
adding insulation.


I am considering putting 100mm of insulation under the loft conversion floor
to help keep the heat downstairs.

Ah, missed the bungalow bit - hence why the BCO did not insist on it for
fire protection (rules are less strict going from one storey to two than
they are for two to three)

I'd have thought a good dose of insulation just under the tiles would be
the best bet like cellotex/kingspan etc or am I missing something?

You will need this as well, otherwise the loft rooms will be a tad
freezing!


Yes, I'll be having that too!

TBH, the under tile insulation is all you need in the bits covered by
floor - since those rooms will presumably be heated and not dissimilar
in temperature to the rest of the house the heat flow into them will be
limited.

--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/