1st tile job DIY... advice needed.

[AliGage]

6mm ply is no good. What's currently down there. Boards? Chip? Old tlles etc

 

[HorribleHagar]

6mm ply is no good. What's currently down there. Boards? Chip? Old tlles etc

Chip and 9mm ply ontop.. Too thin/weak?

 

[Ian]

Chip and 9mm ply ontop.. Too thin/weak?

Yeah too thin, get the floor back to the chipboard, sort any deflection out, then overboard with 6mm hardiebacker.

 

[AliGage]

As above Hagar. But you need to sort out any defection first. Then as Bri says, glue and screw hardiebacker over the top.

 

[HorribleHagar]

As above Hagar. But you need to sort out any defection first. Then as Bri says, glue and screw hardiebacker over the top.

I need to SLC the chipboard then GLUE and screw the hardie down?

I guess that means I will have to SLC twice... once on the chip board and once on the hardie.

 

[Ian]

I need to SLC the chipboard then GLUE and screw the hardie down?

I guess that means I will have to SLC twice... once on the chip board and once on the hardie.

You don't need to SLC the chipboard, just make sure there is no deflection before you glue (with tile adhesive) and screw the HB.

 

[HorribleHagar]

You don't need to SLC the chipboard, just make sure there is no deflection before you glue (with tile adhesive) and screw the HB.

The crux is that I have a bowl thing going on with the chipboard. The middle of the floor is 1 cm lower than the edges of the room.
To remove deflection I would have to spread the adhesive on quite thick.

 

[DHTiling]

Adhesive will not remove deflection...?

 

[HorribleHagar]

Edit: just realised single part flex can be applied at 12mm in localised areas..

 

[Martyn Leeds]

I've just cooked my tea for me & the Mrs. Gonna be opening a restaurant next week. If anyone wants a vip table, just let me know