Priming Insulation Boards - TilersForums.com

[MW Smith Ceramics]

I always prime Hardi & no more ply but just run over cement boards with a very damp sponge before fixing onto them....

 

[Stef]

I always prime Hardi & no more ply but just run over cement boards with a very damp sponge before fixing onto them....

Hardie is a cement board.
They state you only need to wipe over boards with a damp sponge but I prime them as there isn't going to be an adverse reaction to doing it..
Almost everything I tile gets primed.

 

[hmtiling]

I prime insulation boards so the ufh sticks to them better

 

[Doggit]

is that xps boards as well, and if so (as I'm about to lay some) what ratio primer to water please

 

[LM]

is that xps boards as well, and if so (as I'm about to lay some) what ratio primer to water please

It depends on the make of primer, they all have different densities. It'll tell you in the data sheet. Treat it like your priming a skimmed wall, first coat well diluted 2 or 3-1 to allow it to soak in and second coat 2-1 or neat, it depends on the primer

 

[Doggit]

Thanks for that; I'm using Setcrete acrylic prinmer on the job, and it's 1:4 for porous material, and neat for impervious.