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

 

[Dumbo]

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?

You don't want bal on here because all you will hear is their propaganda like telling everyone they've invented a loose lay Matt when its been around for years and all of sudden bs comes to the conclusion you can't use ply on walls just as bal bring out a tile board which actually gets mentioned in the standards .

 

[Perry]

I myself have never used 6 mm cement boards on a timber floor. Always used 10 mm Delta type board for as long as I can remember.

 

[Qwerty]

I myself have never used 6 mm cement boards on a timber floor. Always used 10 mm Delta type board for as long as I can remember.

Same

 

[Waluigi]

I only use the foam if I’ve got UFH or a wet room. For years I used 12mm Aquapanel, starting from the early 90’s. The 6mm Aquapanel wasn’t available then. Now it’s Hardiebacker, often as low as 6mm.

Oh and of course I used ply too. Back when even the WBP from Wickes was great quality stuff.

 

[Flintstone]

I use 10mm XPS boards on some bathrooms, and when underfloor heating is being used. I never really use them on general floor areas, kitchen diner etc, i always go for the Hardie

 

[Spare Tool]

Regardless of peoples preferences to overboarding floors to state its now BS to use minimum 10mm cement board needs backing up IMO, Ive emailed BAL and await a response..

 

[Blunt Tool]

10mm Jackoboard from CTD glued and screwed every time

 

[Dumbo]

Regardless of peoples preferences to overboarding floors to state its now BS to use minimum 10mm cement board needs backing up IMO, Ive emailed BAL and await a response..

Being a cynical I would want them to quote chapter and verse of bs and not just their interpretation .

 

[Tony Griffin]

View attachment 106020 10mm Jackoboard from CTD glued and screwed every time

Are they the 1200x600 boards in your picture?

 

[Blunt Tool]

Are they the 1200x600 boards in your picture?

Yes