Part of our previously mentioned 17th century Norfolk cottage is a much more
recently built single storey annexe. It has a steeply pitched roof (to
match the rest of the property) and access to this roof space by a small
door in one of the bedrooms. It is wonderful storage space.

The floor timbers are standard 4" x 2" with the standard (then) 4" of
glassfibre insulation. It is loosely floored with moderately thin, but
adequate planks (the previous owner worked for Boulton and Paul and seems to
have access to an inexhaustible supply of timber).

I want to screw down these planks and make the floor more stable - but -
what should I do for insulation? Do I raise each floor timber so I can put
say 2" more insulation under the floor? Do I cram in 2" more insulation to
the existing space? How should this situation be approached - given that
funds are quite tight and I'm not really looking to spend much. I suspect
some sort of compromise will be the answer - but what?

TIA

Keith