Hi

As I posted a few weeks ago, I was about to embark on tiling a wooden
floor. I have tiled floors before but not on a wooden one.

The floor was a floating chipboard floor which I covered in 12mm marine
ply and screwed every 6" in every direction. I then painted with a coat of
PVA and water.

Over the weekend (it now being wednesday morning) I tiled about half the
floor (30 tiles) using Unibond ready mixed tile adhesive for wooden
floors.

I then stayed off the floor until this morngin but noticed that about 5 or
6 of the tiles still move up and down by a few mm's. I assumed that I
hadnt glued it properyl so I took one of the tiles up (which happened to
be at an edge). I found that the glue underneath hadnt really set
particularly hard - it was easy to scrape the glue off the floor with an
old chisel.

Im assuming that the glue sets when the moisture evaporates. If this is
correct, does hte fact that the ply is waterproof, thick and painted with
glue make this understandable ? or is something else wrong ?

If it makes any differenece, the tiles are big (45cmx45cm) so there are
less grouting gaps where the air can get in ? Im not sure about the logic
of this but anyway !

Thanks

Tim