"inNeedofHelp" wrote in message
om...
Hi,
We are planning replacing our floorboarded kitchen floor with
chipboard. The boards are in bad nick with being cut over the years
and lifted for electrics and heating. The joists are spaced at 40cm,
from middle to middle
so according to readers digest 18mm Chippy would be fine.

http://www.readersdigest.co.uk/diy/webpages/274_275.htm

I am wondering if 22mm would be better as I will have less packing out
to do, to bring the floor to the same level as the hall as the current
floorboards are around 25mm thick. Or should I stick to 18mm and use
something to pack it up to the height of hall?



I would probably use 7" x 1" PAR because it's not tongued and grooved. It
means you don't make a mess if you ever need to get to any electrics etc.
It's more expensive than chipboard but when planed will be the nominal 22mm.
It's also fairly moisture resistant and won't swell. It can also take
varnish and look good. Just my two pennies worth!