Over boarding?

[p4ulo]

I use hardibacker, black drywall screws (usually 25mm) and I make a countersink "hole" with the end of a HSS 10mm drill bit, only needs about 3 turns as when it bites it shreds through quick. Nice clean finish then. Agreed, no need to pre-drill all the way through, and the Hardibacker screws you can get a rubbish (IIRC they snap)

 

[RDTiling]

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

Hardie wlll cost you more to buy than the ply wood, but it is a far superior product to plywood.

With the issues you have in the height department, Hardie will solve that too.

It is fitted i line with how others have said, or you could look at fitting DItra over the chipboard, however that again would push up the costs.

 

[Russell brown]

Think I'm going to go with ply. I've not seen hardi backer done, until then I'll go with what I know and just screw a 4" centres. I'm not saying ply is better Im just not sure I'll do hardi backer right until I've seen someone do it.

 

[widler]

Russell ,if you can ply you can hardie, it's easier and better

 

[Stef]

Russell ,if you can ply you can hardie, it's easier and better

Definitely, it's probably one of those jobs that are easier than they look.
I mix my adhesive up wetter than normal & lay board then walk over it & screw it down tight.
I'm dreading the repeat customer phone call that's been laid on Hardie, to go back & rip up floor as they don't like the tiles now.
Those floors ain't budging.

 

[Russell brown]

But you only fix hardi around the edges?, what centres?.

 

[widler]

Hardie has pre marked holes Russell, edges and middle,it's just like plasterboard a ceiling in 4x3s ,same amount of screws and staggerd the same,, I just use a no more ply knife to cut straight and a grinder for awkward cuts , outside obviously [emoji15]

 

[Stef]

But you only fix hardi around the edges?, what centres?.

Roughly 35 screws for a sheet of Hardie, fixed on 200/300 centres.

 

[Russell brown]

What's the price of hardi?. PM if you like.


Russ ( Russell sounds like I'm getting told off )

 

[RDTiling]

Think I'm going to go with ply. I've not seen hardi backer done, until then I'll go with what I know and just screw a 4" centres. I'm not saying ply is better Im just not sure I'll do hardi backer right until I've seen someone do it.

Once you have laid the boards and taped the joints, it should look something like this.

 

[Dash J]

I got told off someone from James hardie that you only need 12 screws per board!!!!

 

[Stef]

I got told off someone from James hardie that you only need 12 screws per board!!!!

They shouldn't be giving out that advice, this is from the product & installation guide.

 

[widler]

I got told off someone from James hardie that you only need 12 screws per board!!!!

That will be no more ply, if someone from James hardie told you that,thy don't know the product !

 

[Ian]

Have a look at this Russ, I did it a while back http://www.tilersforums.com/43-tiling-forum/58805-installation-hardiebacker-250-500-a.html