charlieB wrote:
In process of buying 1920's detached house.
Original part of house has suspended wooden ground floor, 20 year old
extensions on south and east sides are solid floor, leaving 4 airbricks
on North wall and 2 on west wall to provide ventillation under original
floor.

Following full structural survey, Surveyor's advice is to make the rest
of the ground floor solid as well - don't really want to do this on
grounds on cost and disruption - and reckon that its overkill as well.

Current state of underfloor timbers cannot be inspected at present, but
there is no real flex in the wood floor.

Does anyone have ant experience of pumping air under the floor to
maintain air movement - thought is to pump air into the South East
corner, "positively pressurizing the underfloor area forcing air to
exit via airbricks in North and West walls.

Any better ideas?

thanks
Charlie

If there isn't a problem showing there may not be one. Your surveyor is
covering himself (and advising you) just in case.