This job was quite a tough one, certainly for such a small and simple floor.
A well known high Street store won the job originally to supply and fit a kitchen and to tile the floor over electric UFH.
The fitter, after laying 4sqm of 600x600 porcelain from porcelanosa confessed to not being up to the job.
I got called round by the home owner to effectively see if I'd take over. I had to remove the tiling that had been done. Tiles came up easy, discovering then that they weren't back buttered and a 6mm notch was used straight over the cable.
When I put my laser out to check the levels of the remaining floor the line bounced all over the place as I was wandering around (+/-10mm)
Drilled a hole through the insulation boards to discover it was a floater!!
At this stage the kitchen had already been fitted too. Oh dear oh Dear.
So, with height being a massive issue, and the kitchen already in place the options of fixing, replacing or over boarding the floor with 18mm ply all went out the window.
Very nervously and tentatively I opted for 12mm hardie, fixed with a 10mm notch laid in brick fashion and perpendicular to the chipboard. This ment that each join of hardie on the narrow side of the boards fell halfway between any joins in the chipboard. Basically cross bonding the floor. (hope this is all Making sense)
I then screwed the boards down using 30mm turbo golds every 4 inches. A total of 77 screws to a board. 2000 screws throughout the whole floor.
It worked. ALL deflection was eliminated!
It's not necessarily the route I would opt for for any floating floors I come across in the future. But, it did/does work!
@Dan I'm confused now. I have a main image in the JOTM album which brings you here. Then at the top of my first post theres a link to all my images for that job.
