mark wrote:
"mark" wrote in message
...
I am about to fit a chipboard floor.

The existing concrete floor has been covered with a dpm and fixed with
25mm by 50mm battens to receive the chipboard with jablite in between.

Should I screw/nail the chipboard to the battens or just glue the
chipboard to itself along the t&g joints.

If glue, which glue?


Conclusion:
Just lay it unfixed.
If it squeaks, rattles or rolls then sink some screws into the affected
area.
Remember to mark batten positions on wall.

I've just been laying a chipboard floor, if you don't secure it I found
it to creak as the tongue and grooves flex slightly and bounce a lot
when you walk on it. In the end I glued up all the tongue and grooves,
and glued it down to the joists. Very solid and silent job resulted,
much better than when I just had the boards resting under gravity.

The manufacturer gives details of how to install he

http://www.kronospan.co.uk/102449.file.dld

Note:

"We have already described how Kronofloor will react to changes in
moisture. To eliminate any problems after installation the following
instructions must be implemented. These guidelines apply to both joisted
and floating floors. Allow a clear movement gap of 2mm per metre run of
floor at each wall and an absolute minimum gap of 12mm at each wall.
Gaps should be left around rigid up stands including pipes. For floors
where the movement gap cannot be dealt with at the perimeter alone or
which are in excess of 6 metres long e.g. corridors, intermediate
expansion gaps (minimum 12mm), should be incorporated. Expansion gaps
can be hidden at door thresholds. Do not allow the movement gap to be
obstructed with debris and maintain perimeter gaps using packers or
wedges. Remove immediately after adhesive has set."

As for glue, in the tongue and grooves I used:

http://www.toolstation.com/shop/Adhe.../sd3198/p61864
(excellent stuff all round)

and to the joists I used:

http://www.toolstation.com/shop/Adhe.../sd3199/p10243

to provide a bit tolerance to the unevenness of Victorian joists.

I also fastened it down every 400mm with 1 1/2" wood screws, clearance
drilled through the chipboard so as to pull it down hard to the joist.
Any potential for movement or flexing results in creaks. Next job is to
lay Amtico after the plaster has been...