Cement board installation

[Tony Griffin]

Can l put cement board over normal floor boards. They are slightly uneven here and there. Adhesive and screw washer fixings? Thanks.

 

[Spare Tool]

Yes, the adhesive fills any discrepancies in the floorboards, for 6mm cement boards use 25mm screws no washers needed, stagger boards and tape joints..

 

[Tony Griffin]

Brilliant thank you Andy. Any particular recommended adhesive and screws that are best to use? I mean particular type of screw.

 

[Spare Tool]

25mm turbo gold screws, adhesive wise I'd personally use Ultra SPES..

 

[CJ]

Or Hardibacker foam spray adhesive

 

[J Sid]

I was told today B.S. states min 10mm for over boarding. @Paul C. can you confirm this?

 

[Spare Tool]

I was told today B.S. states min 10mm for over boarding. @Paul C. can you confirm this?

New BS Julian? Haven't heard that one, wonder what Mr Hardibacker thinks about that news...

 

[Flintstone]

I'm sure he's got his own bs for that bs, Andy !

 

[J Sid]

that's what bal technical said today when asked why there boards are 10mm thick "because that's British Standard for overboarding on floors"

 

[Spare Tool]

Surely for that to have become BS, BS would have had to test every 6mm cement board available and concluded they were useless... Anybody from BAL we can tag on here? ...and if not, why not?

 

[One Day]

that's what bal technical said today when asked why there boards are 10mm thick "because that's British Standard for overboarding on floors"

And it just so happens that BAL board is what thickness???
And who sits on the board for advising standards???

 

[One Day]

And who is the most cynical forum member ???

 

[Spare Tool]

Well after reading this I'm up there with the cynical..

 

[Spare Tool]

@Tony Griffin sorry this has disrupted your thread... I have over boarded more floorboard floors in 6mm hardi than I care to remember so please crack on, do it properly to the manufacturers specification's and don't worry...
This won't be the last we hear of this but I don't think its fair to discuss it in this particular thread..

 

[Tony Griffin]

No worries, it's interesting stuff. Thanks for your advice. It is gratefully taken on board