Tiling on multiple layers

[kevinwalters]

I wish to tile my conservatory.
I have just fitted an engineered oak floor to the lounge and there is a step down of approximately 1" to the laminated wooden floor in the conservatory.
I have checked and believe the following to be correct. The conservatory had a screed concrete floor interspaced with wooden batons, the next layer is a fibreboard (not ply) floorboard on which the laminated wooden floor is fitted. All of the flooring is stable with no flex or movement.
My question is (as it is a large area 21 sq/m) can I increase the height by bonding and screwing an inexpensive material such as osb or Chipboard
Note I have no damp problems

assistance appreciated

 

[skitzee2k]

I would say ply it rather than chipboard, BS min is 15mm ply, so anything above that is fine. Just make sure it is screwed down a lot, would suggest every 300mm. Once that is done, SBR it and you're ready to go.

 

[tictic]

you could just get back to the screed and fit a backerboard..wedi/marmox etc they range in sizes from 6mm - 60mm so depending on thickness off your tiles and adhesive you could get a b/board size to siut.

 

[skitzee2k]

As tictic said, that is probably the ideal situation. May run into cost problems there though as you'll be looking at around £600 to redo with wediboard based on a 50mm depth (14 boards). Marmol would probably be a bit cheaper, but even at a very good trade rate it might cost more pennies than it is worth.

 

[tictic]

1"=25mm
so 12.5mm b/board..hardie/aquapanel/wedi...etc then tile@8mm then bed of adhesive should get you there or abouts.

backerboards 1200x900 around £12-15..buying a few ask for more %..

 

[skitzee2k]

That is about right if he doesn't strip back to screed, which once you add the thickness of laminate and fibreboard, i'd imagine you'd need something thicker than 12.5m aquapanel/hardi/marmol/wedi. Each mm costs money.