Over boarding?

[Russell brown]

I've got a kitchen floor to tile with a porcelain tile. The floor at the minute is t&g chipboard which I'm planning on over boarding. The two questions I have is would you use ply or hardibacker board as I've never used it but as height is an issue would 6mm be good enough? As there's no deflection. Also normally I only overboard bathrooms and as I have normally taken the flooring up to re route pipes I don't charge them to overboard the flooring. What do people carge per metre? I've got just under 30m2 to do.

Russ

 

[Old Mod]

Yeah 6mm Hardi for over boarding is fine.
Not allowed to discuss pricing in an open forum, but I charge my hourly rate plus mats, if that's any use to you Russ.

 

[Russell brown]

I usually use ply, never used hardibacker before, is the cost around the same and is it fixed the same?

 

[Stef]

I try not to tile to ply now, not a good surface to tile to & has had it's day, Hardie or thermal board all day long now.
Most of the ply isn't wbp & delaminates far too easily.

 

[Russell brown]

I try not to tile to ply now, not a good surface to tile to & has had it's day, Hardie or thermal board all day long now.
Most of the ply isn't wbp & delaminates far too easily.

I only use far eastern as I find wbp is crap and delaminates as you say.

 

[Old Mod]

Fixing Hardi isn't difficult. Stick it down with a single part adhesive, Hardi say non flex, most of us use flexi tho. Then screw down in pre marked spaces on the board. Just stagger your joints. I find it best to pre drill and countersink first.

 

[Stef]

Fixing Hardi isn't difficult. Stick it down with a single part adhesive, Hardi say non flex, most of us use flexi tho. Then screw down in pre marked spaces on the board. Just stagger your joints. I find it best to pre drill and countersink first.

What screws you using?
I've never pre drilled Hardie, I use turbo golds or reisser cutter & they drive in fine.

 

[Old Mod]

Usually turbos Stef, I just get irritated if they don't countersink properly or they crush the edges. :smilewinkgrin:

 

[Stef]

Usually turbos Stef, I just get irritated if they don't countersink properly or they crush the edges. :smilewinkgrin:

Do you use a drill /driver or an impact driver?
I use my impact & can sometimes drive the screw too far & go through the board.

 

[Old Mod]

Do you use a drill /driver or an impact driver?
I use my impact & can sometimes drive the screw too far & go through the board.

Haha same same! Yeah impact usually.
I think it's safe to say you don't NEED to pre drill, but certainly if I have a labourer he does the pre drilling haha

 

[Stef]

Haha, can't have the Labrador standing about doing nothing..

 

[Old Mod]

Nope!

 

[thickbed]

I used some 25mm self drilling screws with hardi worked very very well

 

[ttt tiling]

Ditra Mat , that's what it was invented for

 

[White Room]

With the Turbo screws I just tap them in lightly with a hammer and then screw...