15 reasons not to choose Hardy board ?

[Ajax123]

Of course you can use hardi over concrete. I've done it several times with no issue...

 

[Perry]

Have always gone with marmox type boards on floors or tanking, as you have to tank cement boards.

 

[afright]

Not only to be a tiler but a boffin as well.

 

[The D]

Of course you can use hardi over concrete. I've done it several times with no issue...

did you drill and screw or did you fix with just adhesive??

 

[Ajax123]

did you drill and screw or did you fix with just adhesive??

Well........ I used it before I knew you were supposed to stick it down to fill the voids. I drilled, plugged and screwed it every 200mm or so ( used the on board grid as the measure) the floor underneath was levelled using a leveling compound first though so it was good and flat. I used the hardi because the levelling compound did not stick the the concrete properly and delaminates in a couple of patches. That was about 3 years ago and it is fine so far.

 

[Ajax123]

Well........ I used it before I knew you were supposed to stick it down to fill the voids. I drilled, plugged and screwed it every 200mm or so ( used the on board grid as the measure) the floor underneath was levelled using a leveling compound first though so it was good and flat. I used the hardi because the levelling compound did not stick the the concrete properly and delaminates in a couple of patches. That was about 3 years ago and it is fine so far.

ive also used it on a couple of screeds one was stuck and screwed the other was just stuck as there was wet UFH in the screed

 

[Andy Allen]

Well........ I used it before I knew you were supposed to stick it down to fill the voids. I drilled, plugged and screwed it every 200mm or so ( used the on board grid as the measure) the floor underneath was levelled using a leveling compound first though so it was good and flat. I used the hardi because the levelling compound did not stick the the concrete properly and delaminates in a couple of patches. That was about 3 years ago and it is fine so far.

did you level over one of your gypsum screeds.....:sofahide: