Bumpy floor best solution

[Terrytibbs9]

Hi, two parts to this!

1) I am about to tile my kitchen 3x3m with porcelian.
However the floor is all over the place. Has multiple lumps and drops etc.

Should I laytex, then board? What is the best solution without raising the floor height too much??

2) 14sqm ceramic floor tiles. At the moment it's just floor boards. Not springing, sound condition. Can I just board with 12mm ply? Or should I use backer board?? Again want to keep the height difference down, as its a hallway leading into 4 rooms!

Looking for the cheapest option.........obviously!

 

[kilty55]

cheapest option will fail terrytibbs

the floor would need boarded and levelled before tiling started tibbs,if sound you could use backer boards such as aquapanel

 

[Bubblecraft]

Hi & welcome to TF. I would glue & screw 6mm hardibacker boards. Keeps your height at a minimum & a good substrate to tile on.

 

[Terrytibbs9]

That was quick! Cheers guys. So would I need to laytex the bumpy floor before laying backing board? Or will the board overcome any lumps and bumps?

 

[Bubblecraft]

Depending on how bad your floor is. You will need to knock off the worst of it then the rest can be lost in the adhesive (providing no bits are higher than 4mm if using a 10mm notch trowel)

 

[SJPurdy]

for the hallway the advise above to use a suitable 6mm tile backer board (glued and screwed) is good.
For the kitchen floor you do not state what the construction of the floor is. If it is a solid screed that has been badly done then using a suitable self levelling compound should suffice; but if it is a timber tongue groove boarded floor that is up and down then the best solution would be to remove the timber; level up the joists; add noggins at 300 c/c if necessary; lay 18mm exterior grade ply; then 6mm tile backer board.
Steve

 

[beanz]

If you lay 18mm ply on joists, you could save on height by using ditra, rather than backer boards.. Need to make sure there's no deflection in that floor though