hardibacker

[wayne]

just been to price a kitchen floor up and the customer has put 38 sqm of hardibacker down onto t+g boards. no addy is under the boards so would i still be ok to tile onto it?

 

[Varley]

See how steady the floor is but for a floor of that size I would say it should really have had addy down aswell.

 

[grumpygrouter]

If a problem develops in the future then Hardie will not entertain it, as their installation literature states a 6mm notch trowel bed of adhesive. I assume it was 6mm hardie i.e. hardie 250 not 500?

 

[GazTech]

just been to price a kitchen floor up and the customer has put 38 sqm of hardibacker down onto t+g boards. no addy is under the boards so would i still be ok to tile onto it?

Can you confirm the thickness of the Hardiebacker plz....Gaz

 

[wetdec]

If not used adhesive how then are they fixed ?

If the boards do not have all under adhesive support and the boards beneath have dips and high points you will get deflection and eventually cracking of the tile surface.


tiler


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[wayne]

i didnt notice whether it was the 250 or 500. i am not really clued up on hardibacker as i use no more ply myself. i just remeber something about using addy under the boards

 

[GazTech]

i didnt notice whether it was the 250 or 500. i am not really clued up on hardibacker as i use no more ply myself. i just remeber something about using addy under the boards

The 12mm board gives you the best go at it, we at Bal will recommend 10mm backerboard overlay with spf or rapid flexi adhesive Wayne. 6mm version overlayed, glued or not has to be two part flexi .....Gaz

 

[wetdec]

I think you have 2 ways forward m8

You either lift them and use a flexi underneath or you re-screw them at 150mm centres. Personally if you go for the rescrew option I would get the customer to do it and ensure its clear you are responsible just for the tiling.

tiler


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tiler

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[Pawelzik]

If a problem develops in the future then Hardie will not entertain it, as their installation literature states a 6mm notch trowel bed of adhesive....

:iagree:with grumpy as this clarifies all guarantee questions. Screwing down I wouldn´t recommand as screws can be regarded to be possible sonic bridges.