Chipboard, Hardie backer primer!

[STEvieXE]

Hey guys think I may be about to make a boo boo!

I am tiling a chipboard floor, firstly over boarding with Hardiebacker. I have cut all the Hardie, hoovered the floor and just primed the floor with neat primer g.

While waiting on the primer g drying (having lunch) I was just reading over the data sheet and I'm not sure its a suitable primer for my job.

Can anyone shed any light on this? And if its wrong must I remove it or just prime over with a more suitable Primer?

 

[Stef]

What adhesive are you using?
I take it it's a Mapei?
Make sure the primer doesn't skin, it's years since I've used primer G but I'm more than certain I've used it neat without a problem.
You can prime the Hardie once fitted but you don't have to, you can wipe it with a cloth or sponge but I prime everything I tile.

 

[STEvieXE]

Keraflex maxi is the adhesive so am I good to start?

 

[STEvieXE]

My post maybe confusing but I am talking about priming the chipboard before overboarding

 

[Stef]

That's what I was meaning, you must prime the chipboard before sticking adhesive to it.
You may be getting mixed up with priming Hardie as they say you don't need to but as I say I prime everything I tile.

 

[STEvieXE]

So is primer g suitable for the chipboard?

 

[Stef]

So is primer g suitable for the chipboard?

Yeah, as long as it hasn't skinned on the surface it will be fine.

 

[Tile seller]

As stated above,primer g needs to be watered down so that it absorbs into the substrate material, as apposed to sitting on the surface like a skin. So,as long as its soaked in all's fine. You can use it neat so long as the substrate is porous enough for it t soak in.

Keraflex maxi doesn't look to be a recommended adhesive onto chipboard by Mapei. Keraquick with latex plus would perhaps be better. Looks like Mapei like an s2 to be used with chip board.

 

[Dave]

If you are boarding with hardibacker , then adhesive doesn't have to be S2 etc , it's simply to take up voids , the screws hold it in situ. Then you tile with suitable adhesive.

 

[Stef]

If you are boarding with hardibacker , then adhesive doesn't have to be S2 etc , it's simply to take up voids , the screws hold it in situ. Then you tile with suitable adhesive.

As Dave says, it doesn't even need to be a flexi for fixing Hardie.
I always use a flexi for wooden substrates as it sits better in me head.