Hardiebacker

[harry]

Hi when dabbing hardibacker onto brickwork would you recommend the 6mm or the 12 mm ?

thanks Harry

 

[thfc191]

I'd use 12mm for walls extra strength and 6mm for floors , im just starting out , so also check the other guys opinions

 

[DHTiling]

You do not Dab Hardi backer...:ninja:

HardieBacker EN installation 200810 masonry walls.pdf

 

[harry]

You do not Dab Hardi backer...:ninja:

HardieBacker EN installation 200810 masonry walls.pdf

thanks dave wasnt aware of that, 6mm notched trowel is no good for this job as its an old property and the walls are all over the place ! hence why i was going to dab them, whats the max kg per m2 on bare plasterboard ? i was hoping to fix travertine 410 x300 to my shower area in my property that I`m renovating ,
thanks.

 

[DHTiling]

32 kg inc addy and grout.


Weigh a mtr of tiles and add 3 to 4 kg for adhesive and grout.

 

[harry]

32 kg inc addy and grout.


Weigh a mtr of tiles and add 3 to 4 kg for adhesive and grout.

cheers Dave, also when I mentioned dabbing the hardibacker I was going to use drywall adhesive that plasteres use to dab boards as we all know how hard that sets and then add some additional screws...

 

[Scott]

I asked my supplier last week the weight of their travertine, they said its 20kg per metre, so given the addy and grout it should be ok for plasterboard?

If im wrong im sure someone will tell me.......

 

[DHTiling]

cheers Dave, also when I mentioned dabbing the hardibacker I was going to use drywall adhesive that plasteres use to dab boards as we all know how hard that sets and then add some additional screws...

I can only say what hardibacker passed onto me..I cannot say whether your method will be ok.. as the dry wall normally sticks to the paper lining of plasterboard and not cement boards..

 

[White Room]

I would'nt use dry wall adhesive with a cement board

 

[harry]

I would'nt use dry wall adhesive with a cement board

for what reasons whitebeam ?

 

[Diamond Pool Finishers]

i would use addy and go for full bed/fix of board, your finish is only as good as your backing!!

 

[The Legend; Phil Hobson RIP]

Hi Harry, I have Never used Hardibacker on walls. But I use Wedi or Marmox, on brick work I think flex adhesive would be better. Mapei or the like, not sure if Hardiebacker is suitable for dot and dab.

 

[White Room]

The reason being it was'nt designed for the purpose, dry wall adhesive is for gypsum boards even certain metal systems.

You may get a reaction between the two materials which cause a failure if moisture penetrates the gypsum and cement.

 

[harry]

The reason being it was'nt designed for the purpose, dry wall adhesive is for gypsum boards even certain metal systems.

You may get a reaction between the two materials which cause a failure if moisture penetrates the gypsum and cement.

Thanks for all your replies and info, due to the bare brick work been very uneven ( 120 yr old house ) so a full bed of adhesive is not possible, i think I will have to dab it out with plasterboard and then fit a homelux tanking kit ..

 

[doug boardley]

why not use a sand/cement render for your bare blockwork?