On Sep 10, 10:37*am, "george (dicegeorge)"
wrote:
Robert Laws wrote:

xxx



Just to clarify; *I want to build in sympathy with the rest of the
house. *This means no T+G (and no chipboard of course). * It means
using boards similar to the ones I already have even though better
quality ones might be available.

Why not tongue and groove?
The difference wont show,
but if the wood does expand or contract there wont be so many draughts.
Or does the secret nailing stop the groove being an expansion joint?

http://wiki.diyfaq.org.uk/index.php?...n_a_Wood_Floor

And on this subject when improving victorian floors
is it a good idea to put kingspan under them to insulate them
and should we put a plastic vapour barrier on top of the kingspan
or would that trap any spills of water in the house
and cause more rot than the condensations it's supposed to stop?


I plan to add 100mm celotex under the floor wedged between joists.
Indeed Building Control will probably demand this sicne I wil be
"renovating a thermal unit".

I'll be nailing them striaght down with old fashioned flooring brads.

T+G is not quite invisible: the board edges are all exactly the same
heigth so you lose that slight uneveness which is part fo the
character. Also it makes lifting boards for access more difficult.

I wodnered about the need for an underfloor vapour barrier. I agree
that it's more likely to be a trap for spilled water. In fact I worry
aboty teh celotex on thos egrounds also.

Robert